/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/mts.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 22:11:04,172 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 22:11:04,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 22:11:04,204 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 22:11:04,255 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 [2021-06-12 22:11:04,282 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 22:11:04,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 22:11:04,283 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 22:11:04,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 22:11:04,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 22:11:04,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 22:11:04,285 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 22:11:04,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 22:11:04,285 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 22:11:04,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 22:11:04,285 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 22:11:04,286 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 22:11:04,286 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:11:04,287 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 22:11:04,287 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 22:11:04,288 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 22:11:04,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 22:11:04,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 22:11:04,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 22:11:04,533 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 22:11:04,534 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 22:11:04,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl [2021-06-12 22:11:04,535 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/mts.wvr.bpl' [2021-06-12 22:11:04,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 22:11:04,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 22:11:04,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 22:11:04,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 22:11:04,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 22:11:04,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 22:11:04,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 22:11:04,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 22:11:04,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 22:11:04,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,605 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... [2021-06-12 22:11:04,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 22:11:04,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 22:11:04,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 22:11:04,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 22:11:04,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 22:11:04,664 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 22:11:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 22:11:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 22:11:04,665 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 22:11:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 22:11:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 22:11:04,665 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 22:11:04,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 22:11:04,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 22:11:04,665 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-12 22:11:04,666 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-12 22:11:04,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-12 22:11:04,667 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 22:11:04,838 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 22:11:04,838 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 22:11:04,839 INFO L202 PluginConnector]: Adding new model mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:11:04 BoogieIcfgContainer [2021-06-12 22:11:04,840 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 22:11:04,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 22:11:04,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 22:11:04,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 22:11:04,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 10:11:04" (1/2) ... [2021-06-12 22:11:04,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4294e8e5 and model type mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 10:11:04, skipping insertion in model container [2021-06-12 22:11:04,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mts.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 10:11:04" (2/2) ... [2021-06-12 22:11:04,844 INFO L111 eAbstractionObserver]: Analyzing ICFG mts.wvr.bpl [2021-06-12 22:11:04,848 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 22:11:04,848 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 22:11:04,848 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 22:11:04,848 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 22:11:04,873 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-12 22:11:04,887 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-12 22:11:04,899 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 22:11:04,899 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 22:11:04,899 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 22:11:04,899 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 22:11:04,899 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 22:11:04,899 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 22:11:04,899 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 22:11:04,900 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 22:11:04,905 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2021-06-12 22:11:04,920 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:04,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 22:11:04,927 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:04,928 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:04,928 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:04,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:04,931 INFO L82 PathProgramCache]: Analyzing trace with hash -361716151, now seen corresponding path program 1 times [2021-06-12 22:11:04,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:04,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678739323] [2021-06-12 22:11:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:05,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:05,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678739323] [2021-06-12 22:11:05,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678739323] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:11:05,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:11:05,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:11:05,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614817218] [2021-06-12 22:11:05,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 22:11:05,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 22:11:05,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:11:05,082 INFO L87 Difference]: Start difference. First operand has 114 states, 112 states have (on average 2.8035714285714284) internal successors, (314), 113 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:05,137 INFO L93 Difference]: Finished difference Result 154 states and 436 transitions. [2021-06-12 22:11:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 22:11:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-12 22:11:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:05,147 INFO L225 Difference]: With dead ends: 154 [2021-06-12 22:11:05,147 INFO L226 Difference]: Without dead ends: 154 [2021-06-12 22:11:05,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 22:11:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-06-12 22:11:05,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 133. [2021-06-12 22:11:05,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2021-06-12 22:11:05,205 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 18 [2021-06-12 22:11:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:05,205 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2021-06-12 22:11:05,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2021-06-12 22:11:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 22:11:05,207 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:05,207 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:05,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 22:11:05,209 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:05,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2043191081, now seen corresponding path program 1 times [2021-06-12 22:11:05,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:05,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567733965] [2021-06-12 22:11:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:05,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:05,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567733965] [2021-06-12 22:11:05,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567733965] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 22:11:05,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 22:11:05,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 22:11:05,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964874761] [2021-06-12 22:11:05,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 22:11:05,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 22:11:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 22:11:05,251 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:05,284 INFO L93 Difference]: Finished difference Result 158 states and 448 transitions. [2021-06-12 22:11:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 22:11:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-12 22:11:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:05,286 INFO L225 Difference]: With dead ends: 158 [2021-06-12 22:11:05,286 INFO L226 Difference]: Without dead ends: 158 [2021-06-12 22:11:05,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 22:11:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-06-12 22:11:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-06-12 22:11:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2021-06-12 22:11:05,293 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2021-06-12 22:11:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:05,293 INFO L482 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2021-06-12 22:11:05,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2021-06-12 22:11:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:11:05,294 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:05,294 INFO L472 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] [2021-06-12 22:11:05,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 22:11:05,295 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:05,295 INFO L82 PathProgramCache]: Analyzing trace with hash -219246905, now seen corresponding path program 1 times [2021-06-12 22:11:05,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:05,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181345271] [2021-06-12 22:11:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:05,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:05,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:05,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181345271] [2021-06-12 22:11:05,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181345271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:05,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19547840] [2021-06-12 22:11:05,787 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 [2021-06-12 22:11:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 22:11:05,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:06,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:06,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:06,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-12 22:11:06,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:06,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:06,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-06-12 22:11:06,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:06,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:06,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-06-12 22:11:06,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:06,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2021-06-12 22:11:06,196 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:06,246 INFO L628 ElimStorePlain]: treesize reduction 54, result has 43.2 percent of original size [2021-06-12 22:11:06,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:11:06,248 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:153, output treesize:35 [2021-06-12 22:11:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:06,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19547840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:06,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:06,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:11:06,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325806126] [2021-06-12 22:11:06,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:06,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:06,291 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:06,583 INFO L93 Difference]: Finished difference Result 330 states and 935 transitions. [2021-06-12 22:11:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:11:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:11:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:06,585 INFO L225 Difference]: With dead ends: 330 [2021-06-12 22:11:06,585 INFO L226 Difference]: Without dead ends: 315 [2021-06-12 22:11:06,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:11:06,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-12 22:11:06,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 224. [2021-06-12 22:11:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2021-06-12 22:11:06,593 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2021-06-12 22:11:06,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:06,593 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2021-06-12 22:11:06,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:06,594 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2021-06-12 22:11:06,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:11:06,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:06,595 INFO L472 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] [2021-06-12 22:11:06,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 22:11:06,805 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:06,806 INFO L82 PathProgramCache]: Analyzing trace with hash -387055997, now seen corresponding path program 2 times [2021-06-12 22:11:06,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:06,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206197312] [2021-06-12 22:11:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:07,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:07,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206197312] [2021-06-12 22:11:07,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206197312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:07,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882192777] [2021-06-12 22:11:07,085 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 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 [2021-06-12 22:11:07,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:07,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 22:11:07,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:07,343 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:07,343 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 21 treesize of output 17 [2021-06-12 22:11:07,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:07,354 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:11:07,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 16 treesize of output 13 [2021-06-12 22:11:07,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:07,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:07,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-06-12 22:11:07,365 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:07,372 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:11:07,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2021-06-12 22:11:07,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:07,406 INFO L628 ElimStorePlain]: treesize reduction 49, result has 38.0 percent of original size [2021-06-12 22:11:07,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:11:07,411 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:145, output treesize:31 [2021-06-12 22:11:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:07,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882192777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:07,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:07,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-12 22:11:07,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823274054] [2021-06-12 22:11:07,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:11:07,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:07,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:11:07,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:11:07,492 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-06-12 22:11:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:07,936 INFO L93 Difference]: Finished difference Result 374 states and 1077 transitions. [2021-06-12 22:11:07,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:11:07,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:11:07,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:07,938 INFO L225 Difference]: With dead ends: 374 [2021-06-12 22:11:07,938 INFO L226 Difference]: Without dead ends: 359 [2021-06-12 22:11:07,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 540.8ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:11:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-12 22:11:07,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 229. [2021-06-12 22:11:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2021-06-12 22:11:07,946 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2021-06-12 22:11:07,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:07,946 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2021-06-12 22:11:07,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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) [2021-06-12 22:11:07,946 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2021-06-12 22:11:07,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:11:07,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:07,947 INFO L472 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] [2021-06-12 22:11:08,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 22:11:08,163 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:08,164 INFO L82 PathProgramCache]: Analyzing trace with hash -88282549, now seen corresponding path program 3 times [2021-06-12 22:11:08,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:08,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854345538] [2021-06-12 22:11:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:08,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:08,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:08,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854345538] [2021-06-12 22:11:08,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854345538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:08,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648485981] [2021-06-12 22:11:08,388 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 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 [2021-06-12 22:11:08,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:11:08,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:08,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 22:11:08,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:08,621 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:11:08,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:11:08,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:08,628 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:11:08,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 36 [2021-06-12 22:11:08,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:08,667 INFO L628 ElimStorePlain]: treesize reduction 38, result has 54.8 percent of original size [2021-06-12 22:11:08,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-12 22:11:08,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:08,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:08,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:11:08,692 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:173, output treesize:27 [2021-06-12 22:11:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:08,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648485981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:08,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:08,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:11:08,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66497075] [2021-06-12 22:11:08,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:08,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:08,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:08,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:08,777 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:09,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:09,026 INFO L93 Difference]: Finished difference Result 296 states and 831 transitions. [2021-06-12 22:11:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:11:09,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:11:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:09,028 INFO L225 Difference]: With dead ends: 296 [2021-06-12 22:11:09,028 INFO L226 Difference]: Without dead ends: 281 [2021-06-12 22:11:09,028 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 380.4ms TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:11:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-06-12 22:11:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 241. [2021-06-12 22:11:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:09,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2021-06-12 22:11:09,035 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2021-06-12 22:11:09,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:09,035 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2021-06-12 22:11:09,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2021-06-12 22:11:09,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 22:11:09,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:09,036 INFO L472 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] [2021-06-12 22:11:09,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 22:11:09,249 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1482543051, now seen corresponding path program 4 times [2021-06-12 22:11:09,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:09,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922674238] [2021-06-12 22:11:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:09,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:09,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922674238] [2021-06-12 22:11:09,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922674238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:09,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651162669] [2021-06-12 22:11:09,424 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 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 [2021-06-12 22:11:09,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:09,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:09,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 22:11:09,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:09,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:09,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 24 [2021-06-12 22:11:09,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:09,634 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:11:09,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2021-06-12 22:11:09,634 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:09,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:09,683 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:11:09,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 17 [2021-06-12 22:11:09,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:09,693 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:11:09,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 13 [2021-06-12 22:11:09,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:09,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:09,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:11:09,738 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:153, output treesize:73 [2021-06-12 22:11:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:09,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651162669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:09,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:09,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:11:09,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292891006] [2021-06-12 22:11:09,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:09,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:09,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:09,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:09,849 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:10,189 INFO L93 Difference]: Finished difference Result 425 states and 1233 transitions. [2021-06-12 22:11:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 22:11:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-12 22:11:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:10,192 INFO L225 Difference]: With dead ends: 425 [2021-06-12 22:11:10,192 INFO L226 Difference]: Without dead ends: 410 [2021-06-12 22:11:10,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 444.0ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:11:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-12 22:11:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 247. [2021-06-12 22:11:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.9186991869918697) internal successors, (718), 246 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 718 transitions. [2021-06-12 22:11:10,198 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 718 transitions. Word has length 22 [2021-06-12 22:11:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:10,199 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 718 transitions. [2021-06-12 22:11:10,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 718 transitions. [2021-06-12 22:11:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:10,199 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:10,199 INFO L472 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] [2021-06-12 22:11:10,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:10,413 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:10,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:10,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1258502875, now seen corresponding path program 5 times [2021-06-12 22:11:10,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:10,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072109692] [2021-06-12 22:11:10,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:10,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:10,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072109692] [2021-06-12 22:11:10,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072109692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:10,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524648274] [2021-06-12 22:11:10,455 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 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 [2021-06-12 22:11:10,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:11:10,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:10,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:10,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524648274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:10,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:10,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:11:10,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329874628] [2021-06-12 22:11:10,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:10,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:10,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:10,551 INFO L87 Difference]: Start difference. First operand 247 states and 718 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:10,870 INFO L93 Difference]: Finished difference Result 619 states and 1783 transitions. [2021-06-12 22:11:10,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:11:10,871 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:10,873 INFO L225 Difference]: With dead ends: 619 [2021-06-12 22:11:10,873 INFO L226 Difference]: Without dead ends: 619 [2021-06-12 22:11:10,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:11:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-06-12 22:11:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 297. [2021-06-12 22:11:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 3.050675675675676) internal successors, (903), 296 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 903 transitions. [2021-06-12 22:11:10,881 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 903 transitions. Word has length 24 [2021-06-12 22:11:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:10,881 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 903 transitions. [2021-06-12 22:11:10,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 903 transitions. [2021-06-12 22:11:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:10,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:10,882 INFO L472 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] [2021-06-12 22:11:11,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 22:11:11,097 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:11,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2060145577, now seen corresponding path program 6 times [2021-06-12 22:11:11,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:11,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496265261] [2021-06-12 22:11:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:11,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496265261] [2021-06-12 22:11:11,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496265261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120146856] [2021-06-12 22:11:11,131 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 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 [2021-06-12 22:11:11,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:11:11,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:11,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:11,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:11,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120146856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:11,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:11,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:11,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053269328] [2021-06-12 22:11:11,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:11,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:11,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:11,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:11,240 INFO L87 Difference]: Start difference. First operand 297 states and 903 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:11,939 INFO L93 Difference]: Finished difference Result 1078 states and 2992 transitions. [2021-06-12 22:11:11,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:11:11,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:11,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:11,945 INFO L225 Difference]: With dead ends: 1078 [2021-06-12 22:11:11,945 INFO L226 Difference]: Without dead ends: 1078 [2021-06-12 22:11:11,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=540, Invalid=2010, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:11:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2021-06-12 22:11:11,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 302. [2021-06-12 22:11:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 3.083056478405316) internal successors, (928), 301 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 928 transitions. [2021-06-12 22:11:11,955 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 928 transitions. Word has length 24 [2021-06-12 22:11:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:11,955 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 928 transitions. [2021-06-12 22:11:11,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:11,956 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 928 transitions. [2021-06-12 22:11:11,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:11,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:11,958 INFO L472 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] [2021-06-12 22:11:12,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 22:11:12,177 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash -705917075, now seen corresponding path program 7 times [2021-06-12 22:11:12,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:12,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347225250] [2021-06-12 22:11:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:12,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:12,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347225250] [2021-06-12 22:11:12,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347225250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:12,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834884699] [2021-06-12 22:11:12,227 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 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 [2021-06-12 22:11:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:12,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:12,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834884699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:12,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:12,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:12,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835405273] [2021-06-12 22:11:12,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:12,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:12,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:12,369 INFO L87 Difference]: Start difference. First operand 302 states and 928 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:12,982 INFO L93 Difference]: Finished difference Result 951 states and 2692 transitions. [2021-06-12 22:11:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:11:12,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:12,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:12,986 INFO L225 Difference]: With dead ends: 951 [2021-06-12 22:11:12,986 INFO L226 Difference]: Without dead ends: 951 [2021-06-12 22:11:12,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 402.3ms TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:11:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-06-12 22:11:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 293. [2021-06-12 22:11:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.0616438356164384) internal successors, (894), 292 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 894 transitions. [2021-06-12 22:11:12,995 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 894 transitions. Word has length 24 [2021-06-12 22:11:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:12,995 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 894 transitions. [2021-06-12 22:11:12,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 894 transitions. [2021-06-12 22:11:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:12,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:12,996 INFO L472 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] [2021-06-12 22:11:13,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:13,209 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:13,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash -731730967, now seen corresponding path program 1 times [2021-06-12 22:11:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:13,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126188945] [2021-06-12 22:11:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:13,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:13,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126188945] [2021-06-12 22:11:13,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126188945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194596780] [2021-06-12 22:11:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:13,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:11:13,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:13,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194596780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:13,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:11:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781060419] [2021-06-12 22:11:13,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:11:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:11:13,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:11:13,327 INFO L87 Difference]: Start difference. First operand 293 states and 894 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:13,420 INFO L93 Difference]: Finished difference Result 669 states and 1943 transitions. [2021-06-12 22:11:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:11:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:13,423 INFO L225 Difference]: With dead ends: 669 [2021-06-12 22:11:13,423 INFO L226 Difference]: Without dead ends: 663 [2021-06-12 22:11:13,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-12 22:11:13,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 413. [2021-06-12 22:11:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 3.1699029126213594) internal successors, (1306), 412 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1306 transitions. [2021-06-12 22:11:13,431 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1306 transitions. Word has length 24 [2021-06-12 22:11:13,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:13,432 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1306 transitions. [2021-06-12 22:11:13,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1306 transitions. [2021-06-12 22:11:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:13,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:13,433 INFO L472 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] [2021-06-12 22:11:13,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 22:11:13,650 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:13,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1168699675, now seen corresponding path program 8 times [2021-06-12 22:11:13,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:13,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127150436] [2021-06-12 22:11:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:13,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:13,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127150436] [2021-06-12 22:11:13,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127150436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307150281] [2021-06-12 22:11:13,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:13,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:13,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:13,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:13,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307150281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:13,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:13,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:11:13,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74062990] [2021-06-12 22:11:13,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:13,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:13,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:13,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:13,799 INFO L87 Difference]: Start difference. First operand 413 states and 1306 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:13,956 INFO L93 Difference]: Finished difference Result 710 states and 2124 transitions. [2021-06-12 22:11:13,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:11:13,956 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:13,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:13,958 INFO L225 Difference]: With dead ends: 710 [2021-06-12 22:11:13,958 INFO L226 Difference]: Without dead ends: 672 [2021-06-12 22:11:13,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:11:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-06-12 22:11:13,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 515. [2021-06-12 22:11:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.17704280155642) internal successors, (1633), 514 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1633 transitions. [2021-06-12 22:11:13,968 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1633 transitions. Word has length 24 [2021-06-12 22:11:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:13,968 INFO L482 AbstractCegarLoop]: Abstraction has 515 states and 1633 transitions. [2021-06-12 22:11:13,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:13,969 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1633 transitions. [2021-06-12 22:11:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:13,969 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:13,969 INFO L472 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] [2021-06-12 22:11:14,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:14,185 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:14,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1874657007, now seen corresponding path program 2 times [2021-06-12 22:11:14,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:14,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062244216] [2021-06-12 22:11:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:14,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:14,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062244216] [2021-06-12 22:11:14,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062244216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:14,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296828854] [2021-06-12 22:11:14,217 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 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 [2021-06-12 22:11:14,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:14,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:11:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:14,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296828854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:14,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:14,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:11:14,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589528191] [2021-06-12 22:11:14,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:11:14,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:11:14,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:11:14,304 INFO L87 Difference]: Start difference. First operand 515 states and 1633 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:14,388 INFO L93 Difference]: Finished difference Result 830 states and 2453 transitions. [2021-06-12 22:11:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 22:11:14,388 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:14,392 INFO L225 Difference]: With dead ends: 830 [2021-06-12 22:11:14,392 INFO L226 Difference]: Without dead ends: 830 [2021-06-12 22:11:14,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-06-12 22:11:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 530. [2021-06-12 22:11:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 3.153119092627599) internal successors, (1668), 529 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1668 transitions. [2021-06-12 22:11:14,413 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1668 transitions. Word has length 24 [2021-06-12 22:11:14,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:14,413 INFO L482 AbstractCegarLoop]: Abstraction has 530 states and 1668 transitions. [2021-06-12 22:11:14,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1668 transitions. [2021-06-12 22:11:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:14,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:14,414 INFO L472 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] [2021-06-12 22:11:14,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:14,630 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:14,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:14,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1073628723, now seen corresponding path program 9 times [2021-06-12 22:11:14,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:14,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62987375] [2021-06-12 22:11:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:14,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62987375] [2021-06-12 22:11:14,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62987375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:14,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110488188] [2021-06-12 22:11:14,665 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 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 [2021-06-12 22:11:14,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:11:14,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:14,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:14,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:14,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110488188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:14,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:14,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:14,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380884487] [2021-06-12 22:11:14,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:14,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:14,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:14,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:14,753 INFO L87 Difference]: Start difference. First operand 530 states and 1668 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:15,007 INFO L93 Difference]: Finished difference Result 1196 states and 3492 transitions. [2021-06-12 22:11:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:11:15,007 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:15,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:15,011 INFO L225 Difference]: With dead ends: 1196 [2021-06-12 22:11:15,011 INFO L226 Difference]: Without dead ends: 1196 [2021-06-12 22:11:15,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:11:15,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-06-12 22:11:15,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 542. [2021-06-12 22:11:15,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.1497227356746764) internal successors, (1704), 541 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1704 transitions. [2021-06-12 22:11:15,024 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1704 transitions. Word has length 24 [2021-06-12 22:11:15,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:15,024 INFO L482 AbstractCegarLoop]: Abstraction has 542 states and 1704 transitions. [2021-06-12 22:11:15,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,024 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1704 transitions. [2021-06-12 22:11:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:15,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:15,025 INFO L472 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] [2021-06-12 22:11:15,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 22:11:15,240 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1858542817, now seen corresponding path program 10 times [2021-06-12 22:11:15,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:15,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561056073] [2021-06-12 22:11:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:15,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:15,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561056073] [2021-06-12 22:11:15,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561056073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:15,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793727589] [2021-06-12 22:11:15,272 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 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 [2021-06-12 22:11:15,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:15,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:15,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:15,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:15,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793727589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:15,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:15,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:15,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453411526] [2021-06-12 22:11:15,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:15,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:15,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:15,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:15,363 INFO L87 Difference]: Start difference. First operand 542 states and 1704 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:15,729 INFO L93 Difference]: Finished difference Result 1492 states and 4245 transitions. [2021-06-12 22:11:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:11:15,729 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:15,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:15,734 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 22:11:15,734 INFO L226 Difference]: Without dead ends: 1492 [2021-06-12 22:11:15,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:11:15,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-06-12 22:11:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 586. [2021-06-12 22:11:15,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1555555555555554) internal successors, (1846), 585 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1846 transitions. [2021-06-12 22:11:15,748 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1846 transitions. Word has length 24 [2021-06-12 22:11:15,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:15,749 INFO L482 AbstractCegarLoop]: Abstraction has 586 states and 1846 transitions. [2021-06-12 22:11:15,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:15,749 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1846 transitions. [2021-06-12 22:11:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:15,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:15,750 INFO L472 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] [2021-06-12 22:11:15,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:15,965 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash 775520161, now seen corresponding path program 11 times [2021-06-12 22:11:15,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:15,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350729763] [2021-06-12 22:11:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:15,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:15,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350729763] [2021-06-12 22:11:15,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350729763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:15,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529735556] [2021-06-12 22:11:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:11:16,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:16,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:16,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529735556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:16,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:16,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:11:16,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414211975] [2021-06-12 22:11:16,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:16,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:16,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:16,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:16,090 INFO L87 Difference]: Start difference. First operand 586 states and 1846 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:16,307 INFO L93 Difference]: Finished difference Result 1258 states and 3765 transitions. [2021-06-12 22:11:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:11:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:16,312 INFO L225 Difference]: With dead ends: 1258 [2021-06-12 22:11:16,312 INFO L226 Difference]: Without dead ends: 1248 [2021-06-12 22:11:16,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:11:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-12 22:11:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 758. [2021-06-12 22:11:16,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 3.224570673712021) internal successors, (2441), 757 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 2441 transitions. [2021-06-12 22:11:16,328 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 2441 transitions. Word has length 24 [2021-06-12 22:11:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:16,328 INFO L482 AbstractCegarLoop]: Abstraction has 758 states and 2441 transitions. [2021-06-12 22:11:16,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:16,329 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 2441 transitions. [2021-06-12 22:11:16,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:16,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:16,330 INFO L472 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] [2021-06-12 22:11:16,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 22:11:16,541 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:16,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:16,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2048369017, now seen corresponding path program 12 times [2021-06-12 22:11:16,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:16,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596754604] [2021-06-12 22:11:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:16,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:16,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596754604] [2021-06-12 22:11:16,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596754604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:16,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630912021] [2021-06-12 22:11:16,582 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 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 [2021-06-12 22:11:16,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:11:16,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:16,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:16,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:16,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630912021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:16,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:16,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 22:11:16,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223583935] [2021-06-12 22:11:16,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:16,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:16,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:16,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:16,692 INFO L87 Difference]: Start difference. First operand 758 states and 2441 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:16,934 INFO L93 Difference]: Finished difference Result 1329 states and 4025 transitions. [2021-06-12 22:11:16,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:11:16,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:16,938 INFO L225 Difference]: With dead ends: 1329 [2021-06-12 22:11:16,938 INFO L226 Difference]: Without dead ends: 1329 [2021-06-12 22:11:16,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:11:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-06-12 22:11:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 764. [2021-06-12 22:11:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 3.220183486238532) internal successors, (2457), 763 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:16,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 2457 transitions. [2021-06-12 22:11:16,952 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 2457 transitions. Word has length 24 [2021-06-12 22:11:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:16,952 INFO L482 AbstractCegarLoop]: Abstraction has 764 states and 2457 transitions. [2021-06-12 22:11:16,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:16,952 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 2457 transitions. [2021-06-12 22:11:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:16,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:16,953 INFO L472 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] [2021-06-12 22:11:17,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:17,169 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1490304735, now seen corresponding path program 13 times [2021-06-12 22:11:17,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:17,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747024371] [2021-06-12 22:11:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:17,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:17,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747024371] [2021-06-12 22:11:17,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747024371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:17,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358509905] [2021-06-12 22:11:17,201 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 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 [2021-06-12 22:11:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:17,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:17,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358509905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:17,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:17,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:17,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529805303] [2021-06-12 22:11:17,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:17,276 INFO L87 Difference]: Start difference. First operand 764 states and 2457 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:17,589 INFO L93 Difference]: Finished difference Result 1548 states and 4638 transitions. [2021-06-12 22:11:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:11:17,589 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:17,594 INFO L225 Difference]: With dead ends: 1548 [2021-06-12 22:11:17,594 INFO L226 Difference]: Without dead ends: 1544 [2021-06-12 22:11:17,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 179.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:11:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-06-12 22:11:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 772. [2021-06-12 22:11:17,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 3.204928664072633) internal successors, (2471), 771 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:17,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 2471 transitions. [2021-06-12 22:11:17,610 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 2471 transitions. Word has length 24 [2021-06-12 22:11:17,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:17,610 INFO L482 AbstractCegarLoop]: Abstraction has 772 states and 2471 transitions. [2021-06-12 22:11:17,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:17,610 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 2471 transitions. [2021-06-12 22:11:17,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:17,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:17,611 INFO L472 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] [2021-06-12 22:11:17,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-12 22:11:17,825 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:17,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1541712485, now seen corresponding path program 14 times [2021-06-12 22:11:17,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:17,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625315349] [2021-06-12 22:11:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:17,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:17,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:17,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625315349] [2021-06-12 22:11:17,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625315349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:17,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436162595] [2021-06-12 22:11:17,856 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 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 [2021-06-12 22:11:17,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:17,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:17,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436162595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:17,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:17,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:17,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25074621] [2021-06-12 22:11:17,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:17,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:17,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:17,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:17,966 INFO L87 Difference]: Start difference. First operand 772 states and 2471 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:18,697 INFO L93 Difference]: Finished difference Result 2734 states and 8136 transitions. [2021-06-12 22:11:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:11:18,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:18,706 INFO L225 Difference]: With dead ends: 2734 [2021-06-12 22:11:18,706 INFO L226 Difference]: Without dead ends: 2734 [2021-06-12 22:11:18,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:11:18,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2021-06-12 22:11:18,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 841. [2021-06-12 22:11:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.3107142857142855) internal successors, (2781), 840 states have internal predecessors, (2781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2781 transitions. [2021-06-12 22:11:18,731 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2781 transitions. Word has length 24 [2021-06-12 22:11:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:18,731 INFO L482 AbstractCegarLoop]: Abstraction has 841 states and 2781 transitions. [2021-06-12 22:11:18,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2781 transitions. [2021-06-12 22:11:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:18,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:18,733 INFO L472 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] [2021-06-12 22:11:18,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 22:11:18,949 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:18,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1224350167, now seen corresponding path program 15 times [2021-06-12 22:11:18,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:18,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952031443] [2021-06-12 22:11:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:18,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:18,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952031443] [2021-06-12 22:11:18,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952031443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:18,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382858914] [2021-06-12 22:11:18,983 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 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 [2021-06-12 22:11:19,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:11:19,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:19,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:19,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:19,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382858914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:19,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:19,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:19,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469101655] [2021-06-12 22:11:19,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:19,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:19,086 INFO L87 Difference]: Start difference. First operand 841 states and 2781 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:19,709 INFO L93 Difference]: Finished difference Result 2693 states and 8043 transitions. [2021-06-12 22:11:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:11:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:19,714 INFO L225 Difference]: With dead ends: 2693 [2021-06-12 22:11:19,714 INFO L226 Difference]: Without dead ends: 2693 [2021-06-12 22:11:19,715 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1966, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:11:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2693 states. [2021-06-12 22:11:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2693 to 831. [2021-06-12 22:11:19,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 3.289156626506024) internal successors, (2730), 830 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:19,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 2730 transitions. [2021-06-12 22:11:19,738 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 2730 transitions. Word has length 24 [2021-06-12 22:11:19,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:19,738 INFO L482 AbstractCegarLoop]: Abstraction has 831 states and 2730 transitions. [2021-06-12 22:11:19,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:19,738 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 2730 transitions. [2021-06-12 22:11:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:19,739 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:19,739 INFO L472 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] [2021-06-12 22:11:19,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:19,955 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:19,956 INFO L82 PathProgramCache]: Analyzing trace with hash 936318707, now seen corresponding path program 16 times [2021-06-12 22:11:19,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:19,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160217737] [2021-06-12 22:11:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:19,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:19,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160217737] [2021-06-12 22:11:19,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160217737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:19,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195968427] [2021-06-12 22:11:19,990 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 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 [2021-06-12 22:11:20,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:20,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:20,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:20,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:20,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195968427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:20,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:20,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:11:20,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911824181] [2021-06-12 22:11:20,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:20,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:20,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:20,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:20,079 INFO L87 Difference]: Start difference. First operand 831 states and 2730 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:20,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:20,633 INFO L93 Difference]: Finished difference Result 2677 states and 7780 transitions. [2021-06-12 22:11:20,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:11:20,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:20,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:20,638 INFO L225 Difference]: With dead ends: 2677 [2021-06-12 22:11:20,638 INFO L226 Difference]: Without dead ends: 2677 [2021-06-12 22:11:20,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:11:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-12 22:11:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 845. [2021-06-12 22:11:20,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2997630331753554) internal successors, (2785), 844 states have internal predecessors, (2785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:20,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2785 transitions. [2021-06-12 22:11:20,661 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2785 transitions. Word has length 24 [2021-06-12 22:11:20,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:20,662 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2785 transitions. [2021-06-12 22:11:20,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2785 transitions. [2021-06-12 22:11:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:20,663 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:20,663 INFO L472 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] [2021-06-12 22:11:20,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-12 22:11:20,869 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:20,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2008635681, now seen corresponding path program 17 times [2021-06-12 22:11:20,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:20,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414173043] [2021-06-12 22:11:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:20,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:20,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414173043] [2021-06-12 22:11:20,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414173043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:20,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369115436] [2021-06-12 22:11:20,896 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 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 [2021-06-12 22:11:20,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:11:20,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:20,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:20,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:20,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369115436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:20,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:20,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:11:20,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041907344] [2021-06-12 22:11:20,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:20,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:20,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:20,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:20,985 INFO L87 Difference]: Start difference. First operand 845 states and 2785 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:21,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:21,490 INFO L93 Difference]: Finished difference Result 2474 states and 7308 transitions. [2021-06-12 22:11:21,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:11:21,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:21,500 INFO L225 Difference]: With dead ends: 2474 [2021-06-12 22:11:21,501 INFO L226 Difference]: Without dead ends: 2470 [2021-06-12 22:11:21,501 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 304.1ms TimeCoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:11:21,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2021-06-12 22:11:21,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 845. [2021-06-12 22:11:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.2973933649289098) internal successors, (2783), 844 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:21,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2783 transitions. [2021-06-12 22:11:21,523 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2783 transitions. Word has length 24 [2021-06-12 22:11:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:21,523 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 2783 transitions. [2021-06-12 22:11:21,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:21,523 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2783 transitions. [2021-06-12 22:11:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:21,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:21,526 INFO L472 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] [2021-06-12 22:11:21,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:21,741 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:21,741 INFO L82 PathProgramCache]: Analyzing trace with hash 2817957, now seen corresponding path program 18 times [2021-06-12 22:11:21,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:21,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300109881] [2021-06-12 22:11:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:21,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:21,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300109881] [2021-06-12 22:11:21,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300109881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:21,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429686935] [2021-06-12 22:11:21,773 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 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 [2021-06-12 22:11:21,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:11:21,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:21,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:21,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429686935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:21,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:21,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:21,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12839853] [2021-06-12 22:11:21,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:21,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:21,892 INFO L87 Difference]: Start difference. First operand 845 states and 2783 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:22,473 INFO L93 Difference]: Finished difference Result 2514 states and 7408 transitions. [2021-06-12 22:11:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:11:22,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:22,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:22,478 INFO L225 Difference]: With dead ends: 2514 [2021-06-12 22:11:22,478 INFO L226 Difference]: Without dead ends: 2514 [2021-06-12 22:11:22,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=480, Invalid=1590, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:11:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-06-12 22:11:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 853. [2021-06-12 22:11:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.3039906103286385) internal successors, (2815), 852 states have internal predecessors, (2815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2815 transitions. [2021-06-12 22:11:22,501 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2815 transitions. Word has length 24 [2021-06-12 22:11:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:22,501 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2815 transitions. [2021-06-12 22:11:22,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2815 transitions. [2021-06-12 22:11:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:22,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:22,503 INFO L472 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] [2021-06-12 22:11:22,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 22:11:22,717 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:22,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1052559437, now seen corresponding path program 19 times [2021-06-12 22:11:22,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:22,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100115222] [2021-06-12 22:11:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:22,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:22,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100115222] [2021-06-12 22:11:22,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100115222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:22,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893967657] [2021-06-12 22:11:22,748 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 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 [2021-06-12 22:11:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:22,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:22,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:22,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893967657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:22,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:22,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:22,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297148921] [2021-06-12 22:11:22,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:22,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:22,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:22,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:22,840 INFO L87 Difference]: Start difference. First operand 853 states and 2815 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:23,414 INFO L93 Difference]: Finished difference Result 2332 states and 6984 transitions. [2021-06-12 22:11:23,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:11:23,415 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:23,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:23,418 INFO L225 Difference]: With dead ends: 2332 [2021-06-12 22:11:23,418 INFO L226 Difference]: Without dead ends: 2328 [2021-06-12 22:11:23,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=460, Invalid=1432, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:11:23,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-06-12 22:11:23,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 853. [2021-06-12 22:11:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.301643192488263) internal successors, (2813), 852 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2813 transitions. [2021-06-12 22:11:23,437 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2813 transitions. Word has length 24 [2021-06-12 22:11:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:23,437 INFO L482 AbstractCegarLoop]: Abstraction has 853 states and 2813 transitions. [2021-06-12 22:11:23,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2813 transitions. [2021-06-12 22:11:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:23,439 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:23,439 INFO L472 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] [2021-06-12 22:11:23,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 22:11:23,655 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:23,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:23,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1615861683, now seen corresponding path program 3 times [2021-06-12 22:11:23,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:23,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607452797] [2021-06-12 22:11:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:23,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:23,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607452797] [2021-06-12 22:11:23,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607452797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:23,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109031512] [2021-06-12 22:11:23,680 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 [2021-06-12 22:11:23,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 22:11:23,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:23,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 22:11:23,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109031512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:23,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:23,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 22:11:23,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997160986] [2021-06-12 22:11:23,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 22:11:23,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 22:11:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 22:11:23,750 INFO L87 Difference]: Start difference. First operand 853 states and 2813 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:23,822 INFO L93 Difference]: Finished difference Result 929 states and 3034 transitions. [2021-06-12 22:11:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 22:11:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:23,824 INFO L225 Difference]: With dead ends: 929 [2021-06-12 22:11:23,824 INFO L226 Difference]: Without dead ends: 929 [2021-06-12 22:11:23,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-06-12 22:11:23,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 780. [2021-06-12 22:11:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.3029525032092426) internal successors, (2573), 779 states have internal predecessors, (2573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2573 transitions. [2021-06-12 22:11:23,839 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2573 transitions. Word has length 24 [2021-06-12 22:11:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:23,840 INFO L482 AbstractCegarLoop]: Abstraction has 780 states and 2573 transitions. [2021-06-12 22:11:23,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2573 transitions. [2021-06-12 22:11:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:23,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:23,842 INFO L472 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] [2021-06-12 22:11:24,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:24,057 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:24,057 INFO L82 PathProgramCache]: Analyzing trace with hash -685661939, now seen corresponding path program 20 times [2021-06-12 22:11:24,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:24,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923388421] [2021-06-12 22:11:24,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:24,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:24,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923388421] [2021-06-12 22:11:24,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923388421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251465644] [2021-06-12 22:11:24,088 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 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 [2021-06-12 22:11:24,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:24,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:24,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:24,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251465644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:24,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:24,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:11:24,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483959024] [2021-06-12 22:11:24,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:11:24,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:24,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:11:24,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:11:24,156 INFO L87 Difference]: Start difference. First operand 780 states and 2573 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:24,416 INFO L93 Difference]: Finished difference Result 1555 states and 4761 transitions. [2021-06-12 22:11:24,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:11:24,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-12 22:11:24,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:24,418 INFO L225 Difference]: With dead ends: 1555 [2021-06-12 22:11:24,418 INFO L226 Difference]: Without dead ends: 1555 [2021-06-12 22:11:24,419 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 145.6ms TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:11:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2021-06-12 22:11:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 842. [2021-06-12 22:11:24,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.296076099881094) internal successors, (2772), 841 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2772 transitions. [2021-06-12 22:11:24,432 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2772 transitions. Word has length 24 [2021-06-12 22:11:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:24,432 INFO L482 AbstractCegarLoop]: Abstraction has 842 states and 2772 transitions. [2021-06-12 22:11:24,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2772 transitions. [2021-06-12 22:11:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:24,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:24,434 INFO L472 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] [2021-06-12 22:11:24,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 22:11:24,648 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1217017513, now seen corresponding path program 21 times [2021-06-12 22:11:24,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:24,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806993388] [2021-06-12 22:11:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:24,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:24,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806993388] [2021-06-12 22:11:24,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806993388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:24,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427426611] [2021-06-12 22:11:24,680 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 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 [2021-06-12 22:11:24,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:11:24,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:24,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:24,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427426611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:24,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:24,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:11:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029807423] [2021-06-12 22:11:24,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:11:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:24,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:11:24,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:11:24,750 INFO L87 Difference]: Start difference. First operand 842 states and 2772 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:24,957 INFO L93 Difference]: Finished difference Result 1605 states and 4891 transitions. [2021-06-12 22:11:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:11:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-12 22:11:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:24,959 INFO L225 Difference]: With dead ends: 1605 [2021-06-12 22:11:24,959 INFO L226 Difference]: Without dead ends: 1605 [2021-06-12 22:11:24,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:11:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-12 22:11:24,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 896. [2021-06-12 22:11:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.2905027932960893) internal successors, (2945), 895 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2945 transitions. [2021-06-12 22:11:24,973 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2945 transitions. Word has length 24 [2021-06-12 22:11:24,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:24,973 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2945 transitions. [2021-06-12 22:11:24,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:24,973 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2945 transitions. [2021-06-12 22:11:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:24,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:24,975 INFO L472 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] [2021-06-12 22:11:25,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:25,193 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:25,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:25,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2131830039, now seen corresponding path program 22 times [2021-06-12 22:11:25,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:25,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144985523] [2021-06-12 22:11:25,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:25,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144985523] [2021-06-12 22:11:25,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144985523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118224970] [2021-06-12 22:11:25,218 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 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 [2021-06-12 22:11:25,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:25,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:25,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:25,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:11:25,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118224970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:25,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:25,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 22:11:25,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783340204] [2021-06-12 22:11:25,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 22:11:25,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:25,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 22:11:25,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 22:11:25,283 INFO L87 Difference]: Start difference. First operand 896 states and 2945 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:25,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:25,460 INFO L93 Difference]: Finished difference Result 1524 states and 4690 transitions. [2021-06-12 22:11:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:11:25,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-12 22:11:25,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:25,462 INFO L225 Difference]: With dead ends: 1524 [2021-06-12 22:11:25,462 INFO L226 Difference]: Without dead ends: 1520 [2021-06-12 22:11:25,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:11:25,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2021-06-12 22:11:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 896. [2021-06-12 22:11:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.288268156424581) internal successors, (2943), 895 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2943 transitions. [2021-06-12 22:11:25,476 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2943 transitions. Word has length 24 [2021-06-12 22:11:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:25,476 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 2943 transitions. [2021-06-12 22:11:25,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2943 transitions. [2021-06-12 22:11:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:25,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:25,477 INFO L472 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] [2021-06-12 22:11:25,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 22:11:25,693 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1241435117, now seen corresponding path program 23 times [2021-06-12 22:11:25,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:25,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94817593] [2021-06-12 22:11:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:25,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:25,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94817593] [2021-06-12 22:11:25,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94817593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:25,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767059494] [2021-06-12 22:11:25,721 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 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 [2021-06-12 22:11:25,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:11:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:25,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767059494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:25,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:25,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:11:25,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116627673] [2021-06-12 22:11:25,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:11:25,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:25,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:11:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:11:25,791 INFO L87 Difference]: Start difference. First operand 896 states and 2943 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:25,991 INFO L93 Difference]: Finished difference Result 1508 states and 4652 transitions. [2021-06-12 22:11:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:11:25,992 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-12 22:11:25,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:25,993 INFO L225 Difference]: With dead ends: 1508 [2021-06-12 22:11:25,993 INFO L226 Difference]: Without dead ends: 1496 [2021-06-12 22:11:25,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:11:25,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-06-12 22:11:26,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 904. [2021-06-12 22:11:26,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 3.276854928017719) internal successors, (2959), 903 states have internal predecessors, (2959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:26,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 2959 transitions. [2021-06-12 22:11:26,009 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 2959 transitions. Word has length 24 [2021-06-12 22:11:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:26,009 INFO L482 AbstractCegarLoop]: Abstraction has 904 states and 2959 transitions. [2021-06-12 22:11:26,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:26,010 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 2959 transitions. [2021-06-12 22:11:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:26,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:26,011 INFO L472 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] [2021-06-12 22:11:26,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 22:11:26,221 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:26,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:26,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1243112745, now seen corresponding path program 24 times [2021-06-12 22:11:26,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:26,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787456180] [2021-06-12 22:11:26,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:26,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:26,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787456180] [2021-06-12 22:11:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787456180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:26,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020093616] [2021-06-12 22:11:26,251 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 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 [2021-06-12 22:11:26,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:11:26,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:26,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:26,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:26,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:26,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020093616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:26,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:26,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:26,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384385289] [2021-06-12 22:11:26,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:26,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:26,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:26,348 INFO L87 Difference]: Start difference. First operand 904 states and 2959 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:26,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:26,780 INFO L93 Difference]: Finished difference Result 2412 states and 7565 transitions. [2021-06-12 22:11:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:11:26,780 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:26,782 INFO L225 Difference]: With dead ends: 2412 [2021-06-12 22:11:26,783 INFO L226 Difference]: Without dead ends: 2412 [2021-06-12 22:11:26,783 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 291.9ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:11:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2021-06-12 22:11:26,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 960. [2021-06-12 22:11:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 3.367049009384776) internal successors, (3229), 959 states have internal predecessors, (3229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3229 transitions. [2021-06-12 22:11:26,800 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3229 transitions. Word has length 24 [2021-06-12 22:11:26,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:26,800 INFO L482 AbstractCegarLoop]: Abstraction has 960 states and 3229 transitions. [2021-06-12 22:11:26,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:26,800 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3229 transitions. [2021-06-12 22:11:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:26,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:26,801 INFO L472 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] [2021-06-12 22:11:27,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:27,004 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:27,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1522949907, now seen corresponding path program 25 times [2021-06-12 22:11:27,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:27,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075025786] [2021-06-12 22:11:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:27,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075025786] [2021-06-12 22:11:27,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075025786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:27,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666641272] [2021-06-12 22:11:27,041 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 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 [2021-06-12 22:11:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:27,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:27,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:27,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666641272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:27,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:27,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:27,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456778274] [2021-06-12 22:11:27,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:27,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:27,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:27,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:27,141 INFO L87 Difference]: Start difference. First operand 960 states and 3229 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:27,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:27,561 INFO L93 Difference]: Finished difference Result 2335 states and 7372 transitions. [2021-06-12 22:11:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:11:27,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:27,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:27,564 INFO L225 Difference]: With dead ends: 2335 [2021-06-12 22:11:27,564 INFO L226 Difference]: Without dead ends: 2335 [2021-06-12 22:11:27,564 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:11:27,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2335 states. [2021-06-12 22:11:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2335 to 957. [2021-06-12 22:11:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:11:27,587 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:11:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:27,587 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:11:27,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:11:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:27,588 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:27,588 INFO L472 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] [2021-06-12 22:11:27,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:27,797 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash 637718967, now seen corresponding path program 26 times [2021-06-12 22:11:27,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:27,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141656633] [2021-06-12 22:11:27,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:27,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:27,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141656633] [2021-06-12 22:11:27,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141656633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:27,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061149786] [2021-06-12 22:11:27,827 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 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 [2021-06-12 22:11:27,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:27,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061149786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:27,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:27,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:11:27,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523461443] [2021-06-12 22:11:27,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:27,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:27,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:27,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:27,915 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:28,283 INFO L93 Difference]: Finished difference Result 2285 states and 7121 transitions. [2021-06-12 22:11:28,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:11:28,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:28,286 INFO L225 Difference]: With dead ends: 2285 [2021-06-12 22:11:28,286 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 22:11:28,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 226.5ms TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:11:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 22:11:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 963. [2021-06-12 22:11:28,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 22:11:28,302 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 22:11:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:28,302 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 22:11:28,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,302 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 22:11:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:28,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:28,303 INFO L472 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] [2021-06-12 22:11:28,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:28,519 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:28,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:28,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1710035941, now seen corresponding path program 27 times [2021-06-12 22:11:28,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:28,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761496027] [2021-06-12 22:11:28,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:28,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761496027] [2021-06-12 22:11:28,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761496027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:28,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660764624] [2021-06-12 22:11:28,548 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 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 [2021-06-12 22:11:28,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:11:28,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:28,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:28,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:28,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660764624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:28,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:28,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:11:28,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616401232] [2021-06-12 22:11:28,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:28,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:28,633 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:28,955 INFO L93 Difference]: Finished difference Result 2176 states and 6849 transitions. [2021-06-12 22:11:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:11:28,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:28,957 INFO L225 Difference]: With dead ends: 2176 [2021-06-12 22:11:28,957 INFO L226 Difference]: Without dead ends: 2172 [2021-06-12 22:11:28,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:11:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-06-12 22:11:28,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 957. [2021-06-12 22:11:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:11:28,973 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:11:28,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:28,974 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:11:28,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:11:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:28,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:28,975 INFO L472 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] [2021-06-12 22:11:29,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:29,175 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:29,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:29,176 INFO L82 PathProgramCache]: Analyzing trace with hash -295781783, now seen corresponding path program 28 times [2021-06-12 22:11:29,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:29,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145051244] [2021-06-12 22:11:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:29,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:29,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145051244] [2021-06-12 22:11:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145051244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760669919] [2021-06-12 22:11:29,207 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:11:29,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:29,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:29,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:29,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760669919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:29,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:29,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:29,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899444842] [2021-06-12 22:11:29,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:29,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:29,305 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:29,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:29,635 INFO L93 Difference]: Finished difference Result 2199 states and 6893 transitions. [2021-06-12 22:11:29,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:11:29,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:29,638 INFO L225 Difference]: With dead ends: 2199 [2021-06-12 22:11:29,638 INFO L226 Difference]: Without dead ends: 2199 [2021-06-12 22:11:29,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:11:29,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-12 22:11:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 963. [2021-06-12 22:11:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.367983367983368) internal successors, (3240), 962 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3240 transitions. [2021-06-12 22:11:29,654 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3240 transitions. Word has length 24 [2021-06-12 22:11:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:29,654 INFO L482 AbstractCegarLoop]: Abstraction has 963 states and 3240 transitions. [2021-06-12 22:11:29,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3240 transitions. [2021-06-12 22:11:29,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:29,655 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:29,655 INFO L472 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] [2021-06-12 22:11:29,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:29,856 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:29,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1351159177, now seen corresponding path program 29 times [2021-06-12 22:11:29,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:29,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610758108] [2021-06-12 22:11:29,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:29,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:29,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610758108] [2021-06-12 22:11:29,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610758108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:29,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653859365] [2021-06-12 22:11:29,893 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 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 [2021-06-12 22:11:29,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:11:29,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:29,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:29,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:29,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653859365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:29,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:29,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:29,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064038922] [2021-06-12 22:11:29,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:29,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:29,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:29,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:29,983 INFO L87 Difference]: Start difference. First operand 963 states and 3240 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:30,316 INFO L93 Difference]: Finished difference Result 2156 states and 6791 transitions. [2021-06-12 22:11:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:11:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:30,319 INFO L225 Difference]: With dead ends: 2156 [2021-06-12 22:11:30,319 INFO L226 Difference]: Without dead ends: 2152 [2021-06-12 22:11:30,319 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:11:30,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2152 states. [2021-06-12 22:11:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2152 to 957. [2021-06-12 22:11:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 3.3629707112970713) internal successors, (3215), 956 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 3215 transitions. [2021-06-12 22:11:30,335 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 3215 transitions. Word has length 24 [2021-06-12 22:11:30,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:30,336 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 3215 transitions. [2021-06-12 22:11:30,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 3215 transitions. [2021-06-12 22:11:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:30,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:30,337 INFO L472 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] [2021-06-12 22:11:30,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-12 22:11:30,553 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1252113, now seen corresponding path program 30 times [2021-06-12 22:11:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:30,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163976452] [2021-06-12 22:11:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:30,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:30,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163976452] [2021-06-12 22:11:30,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163976452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:30,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129375873] [2021-06-12 22:11:30,585 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 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 [2021-06-12 22:11:30,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:11:30,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:30,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:30,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:30,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129375873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:30,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:30,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:30,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947456815] [2021-06-12 22:11:30,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:30,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:30,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:30,660 INFO L87 Difference]: Start difference. First operand 957 states and 3215 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 22:11:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:30,962 INFO L93 Difference]: Finished difference Result 2097 states and 6377 transitions. [2021-06-12 22:11:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:11:30,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-06-12 22:11:30,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:30,964 INFO L225 Difference]: With dead ends: 2097 [2021-06-12 22:11:30,964 INFO L226 Difference]: Without dead ends: 2097 [2021-06-12 22:11:30,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 187.9ms TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:11:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-12 22:11:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1047. [2021-06-12 22:11:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.378585086042065) internal successors, (3534), 1046 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3534 transitions. [2021-06-12 22:11:30,981 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3534 transitions. Word has length 24 [2021-06-12 22:11:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:30,981 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3534 transitions. [2021-06-12 22:11:30,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 22:11:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3534 transitions. [2021-06-12 22:11:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:30,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:30,983 INFO L472 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] [2021-06-12 22:11:31,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:31,183 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:31,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:31,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1073569087, now seen corresponding path program 31 times [2021-06-12 22:11:31,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:31,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294976229] [2021-06-12 22:11:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:31,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:31,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294976229] [2021-06-12 22:11:31,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294976229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:31,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894054247] [2021-06-12 22:11:31,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:11:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:31,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:31,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894054247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:31,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:31,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:31,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569575347] [2021-06-12 22:11:31,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:31,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:31,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:31,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:31,294 INFO L87 Difference]: Start difference. First operand 1047 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 22:11:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:31,551 INFO L93 Difference]: Finished difference Result 1963 states and 6051 transitions. [2021-06-12 22:11:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:11:31,551 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-06-12 22:11:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:31,553 INFO L225 Difference]: With dead ends: 1963 [2021-06-12 22:11:31,553 INFO L226 Difference]: Without dead ends: 1959 [2021-06-12 22:11:31,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:11:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2021-06-12 22:11:31,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1047. [2021-06-12 22:11:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.376673040152964) internal successors, (3532), 1046 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3532 transitions. [2021-06-12 22:11:31,582 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3532 transitions. Word has length 24 [2021-06-12 22:11:31,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:31,582 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3532 transitions. [2021-06-12 22:11:31,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 22:11:31,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3532 transitions. [2021-06-12 22:11:31,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:31,583 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:31,583 INFO L472 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] [2021-06-12 22:11:31,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 22:11:31,797 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1960561683, now seen corresponding path program 32 times [2021-06-12 22:11:31,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:31,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236581691] [2021-06-12 22:11:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:31,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:31,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236581691] [2021-06-12 22:11:31,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236581691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:31,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777731746] [2021-06-12 22:11:31,825 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 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 [2021-06-12 22:11:31,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:31,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:31,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:31,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777731746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:31,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:31,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:11:31,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047818681] [2021-06-12 22:11:31,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:11:31,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:31,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:11:31,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:11:31,899 INFO L87 Difference]: Start difference. First operand 1047 states and 3532 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 22:11:32,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:32,087 INFO L93 Difference]: Finished difference Result 1728 states and 5494 transitions. [2021-06-12 22:11:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:11:32,087 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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 [2021-06-12 22:11:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:32,089 INFO L225 Difference]: With dead ends: 1728 [2021-06-12 22:11:32,089 INFO L226 Difference]: Without dead ends: 1716 [2021-06-12 22:11:32,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:11:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2021-06-12 22:11:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1047. [2021-06-12 22:11:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.372848948374761) internal successors, (3528), 1046 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:32,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3528 transitions. [2021-06-12 22:11:32,103 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3528 transitions. Word has length 24 [2021-06-12 22:11:32,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:32,103 INFO L482 AbstractCegarLoop]: Abstraction has 1047 states and 3528 transitions. [2021-06-12 22:11:32,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 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) [2021-06-12 22:11:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3528 transitions. [2021-06-12 22:11:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:32,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:32,104 INFO L472 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] [2021-06-12 22:11:32,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:32,313 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:32,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1288275347, now seen corresponding path program 33 times [2021-06-12 22:11:32,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:32,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966464401] [2021-06-12 22:11:32,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:32,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:32,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966464401] [2021-06-12 22:11:32,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966464401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:32,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353440050] [2021-06-12 22:11:32,343 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 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 [2021-06-12 22:11:32,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:11:32,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:32,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:32,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353440050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:32,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:32,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:32,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878621659] [2021-06-12 22:11:32,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:32,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:32,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:32,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:32,444 INFO L87 Difference]: Start difference. First operand 1047 states and 3528 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:32,745 INFO L93 Difference]: Finished difference Result 1821 states and 5719 transitions. [2021-06-12 22:11:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:11:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:32,748 INFO L225 Difference]: With dead ends: 1821 [2021-06-12 22:11:32,748 INFO L226 Difference]: Without dead ends: 1821 [2021-06-12 22:11:32,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:11:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-06-12 22:11:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1119. [2021-06-12 22:11:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.370304114490161) internal successors, (3768), 1118 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3768 transitions. [2021-06-12 22:11:32,763 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3768 transitions. Word has length 24 [2021-06-12 22:11:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:32,763 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3768 transitions. [2021-06-12 22:11:32,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3768 transitions. [2021-06-12 22:11:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:32,765 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:32,765 INFO L472 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] [2021-06-12 22:11:32,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 22:11:32,980 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1951314555, now seen corresponding path program 34 times [2021-06-12 22:11:32,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:32,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503995447] [2021-06-12 22:11:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:33,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503995447] [2021-06-12 22:11:33,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503995447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:33,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758931809] [2021-06-12 22:11:33,012 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 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 [2021-06-12 22:11:33,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:33,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:33,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:33,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758931809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:33,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:33,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 22:11:33,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791324598] [2021-06-12 22:11:33,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:11:33,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:33,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:11:33,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:11:33,103 INFO L87 Difference]: Start difference. First operand 1119 states and 3768 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:33,343 INFO L93 Difference]: Finished difference Result 1790 states and 5648 transitions. [2021-06-12 22:11:33,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:11:33,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:33,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:33,346 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 22:11:33,346 INFO L226 Difference]: Without dead ends: 1786 [2021-06-12 22:11:33,346 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-06-12 22:11:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-06-12 22:11:33,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1119. [2021-06-12 22:11:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.368515205724508) internal successors, (3766), 1118 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3766 transitions. [2021-06-12 22:11:33,361 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3766 transitions. Word has length 24 [2021-06-12 22:11:33,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:33,361 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3766 transitions. [2021-06-12 22:11:33,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3766 transitions. [2021-06-12 22:11:33,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 22:11:33,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:33,363 INFO L472 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] [2021-06-12 22:11:33,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:33,563 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:33,564 INFO L82 PathProgramCache]: Analyzing trace with hash -860517803, now seen corresponding path program 35 times [2021-06-12 22:11:33,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:33,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620117784] [2021-06-12 22:11:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:33,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620117784] [2021-06-12 22:11:33,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620117784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:33,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767552042] [2021-06-12 22:11:33,593 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 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 [2021-06-12 22:11:33,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:11:33,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:33,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:11:33,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:33,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:33,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767552042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:33,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:33,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 22:11:33,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027757616] [2021-06-12 22:11:33,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:11:33,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:33,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:11:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:11:33,678 INFO L87 Difference]: Start difference. First operand 1119 states and 3766 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:33,820 INFO L93 Difference]: Finished difference Result 1649 states and 5332 transitions. [2021-06-12 22:11:33,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:11:33,820 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-12 22:11:33,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:33,822 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 22:11:33,822 INFO L226 Difference]: Without dead ends: 1637 [2021-06-12 22:11:33,822 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:11:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2021-06-12 22:11:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1119. [2021-06-12 22:11:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1119 states, 1118 states have (on average 3.3649373881932023) internal successors, (3762), 1118 states have internal predecessors, (3762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 3762 transitions. [2021-06-12 22:11:33,837 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 3762 transitions. Word has length 24 [2021-06-12 22:11:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:33,837 INFO L482 AbstractCegarLoop]: Abstraction has 1119 states and 3762 transitions. [2021-06-12 22:11:33,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 3762 transitions. [2021-06-12 22:11:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:33,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:33,838 INFO L472 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] [2021-06-12 22:11:34,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:34,053 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1270661831, now seen corresponding path program 4 times [2021-06-12 22:11:34,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:34,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228658085] [2021-06-12 22:11:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:34,464 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-12 22:11:34,669 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-12 22:11:34,863 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-12 22:11:35,051 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-12 22:11:35,185 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-12 22:11:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:35,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228658085] [2021-06-12 22:11:35,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228658085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:35,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206572277] [2021-06-12 22:11:35,238 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 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 [2021-06-12 22:11:35,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:11:35,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:35,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:11:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,706 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 26 treesize of output 16 [2021-06-12 22:11:35,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,714 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 26 treesize of output 16 [2021-06-12 22:11:35,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,721 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 21 [2021-06-12 22:11:35,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,727 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 18 [2021-06-12 22:11:35,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,733 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 31 treesize of output 16 [2021-06-12 22:11:35,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,740 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 39 treesize of output 23 [2021-06-12 22:11:35,741 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,746 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 [2021-06-12 22:11:35,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,752 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 44 treesize of output 26 [2021-06-12 22:11:35,753 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,758 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 21 treesize of output 10 [2021-06-12 22:11:35,759 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,765 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 21 [2021-06-12 22:11:35,770 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,776 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 44 treesize of output 26 [2021-06-12 22:11:35,777 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,783 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 41 treesize of output 22 [2021-06-12 22:11:35,784 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,789 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 18 [2021-06-12 22:11:35,790 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,795 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 16 [2021-06-12 22:11:35,796 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,802 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 [2021-06-12 22:11:35,802 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:35,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:35,806 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 39 treesize of output 23 [2021-06-12 22:11:35,807 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:35,874 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-06-12 22:11:35,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:11:35,876 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-06-12 22:11:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:35,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206572277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:35,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:35,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:11:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892983697] [2021-06-12 22:11:35,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:11:35,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:35,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:11:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:11:35,923 INFO L87 Difference]: Start difference. First operand 1119 states and 3762 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:36,656 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-12 22:11:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:36,943 INFO L93 Difference]: Finished difference Result 1517 states and 4955 transitions. [2021-06-12 22:11:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:11:36,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:36,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:36,945 INFO L225 Difference]: With dead ends: 1517 [2021-06-12 22:11:36,945 INFO L226 Difference]: Without dead ends: 1502 [2021-06-12 22:11:36,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1797.1ms TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:11:36,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-06-12 22:11:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1141. [2021-06-12 22:11:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1141 states, 1140 states have (on average 3.362280701754386) internal successors, (3833), 1140 states have internal predecessors, (3833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1141 states to 1141 states and 3833 transitions. [2021-06-12 22:11:36,960 INFO L78 Accepts]: Start accepts. Automaton has 1141 states and 3833 transitions. Word has length 26 [2021-06-12 22:11:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:36,960 INFO L482 AbstractCegarLoop]: Abstraction has 1141 states and 3833 transitions. [2021-06-12 22:11:36,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1141 states and 3833 transitions. [2021-06-12 22:11:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:36,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:36,961 INFO L472 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] [2021-06-12 22:11:37,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:37,177 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash -757736185, now seen corresponding path program 5 times [2021-06-12 22:11:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:37,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810309384] [2021-06-12 22:11:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:37,539 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-12 22:11:37,663 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-12 22:11:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:37,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:37,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810309384] [2021-06-12 22:11:37,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810309384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:37,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509307968] [2021-06-12 22:11:37,861 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 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 [2021-06-12 22:11:37,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:11:37,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:11:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:38,397 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-06-12 22:11:38,444 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_5], 3=[v_prenex_9, v_prenex_7]} [2021-06-12 22:11:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:38,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:38,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:38,452 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 18 [2021-06-12 22:11:38,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:38,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:38,459 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 25 treesize of output 15 [2021-06-12 22:11:38,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:38,576 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-06-12 22:11:38,576 INFO L628 ElimStorePlain]: treesize reduction 73, result has 74.2 percent of original size [2021-06-12 22:11:38,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:38,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:38,581 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 34 treesize of output 20 [2021-06-12 22:11:38,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:38,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:38,634 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-12 22:11:38,634 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 54 [2021-06-12 22:11:38,637 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:38,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:38,681 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-12 22:11:38,681 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-06-12 22:11:38,683 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:38,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:38,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:11:38,718 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:322, output treesize:59 [2021-06-12 22:11:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:38,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509307968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:38,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:38,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:11:38,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109475019] [2021-06-12 22:11:38,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:11:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:11:38,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:11:38,796 INFO L87 Difference]: Start difference. First operand 1141 states and 3833 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:39,212 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 62 [2021-06-12 22:11:39,441 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 69 [2021-06-12 22:11:39,669 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2021-06-12 22:11:39,839 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-12 22:11:39,991 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2021-06-12 22:11:40,168 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2021-06-12 22:11:40,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:40,548 INFO L93 Difference]: Finished difference Result 1563 states and 5076 transitions. [2021-06-12 22:11:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:11:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:40,550 INFO L225 Difference]: With dead ends: 1563 [2021-06-12 22:11:40,550 INFO L226 Difference]: Without dead ends: 1533 [2021-06-12 22:11:40,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2261.7ms TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:11:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-06-12 22:11:40,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1150. [2021-06-12 22:11:40,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 3.3568320278503045) internal successors, (3857), 1149 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3857 transitions. [2021-06-12 22:11:40,564 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3857 transitions. Word has length 26 [2021-06-12 22:11:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:40,564 INFO L482 AbstractCegarLoop]: Abstraction has 1150 states and 3857 transitions. [2021-06-12 22:11:40,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3857 transitions. [2021-06-12 22:11:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:40,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:40,565 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:40,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:40,766 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:40,766 INFO L82 PathProgramCache]: Analyzing trace with hash 833693123, now seen corresponding path program 36 times [2021-06-12 22:11:40,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:40,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589244890] [2021-06-12 22:11:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:41,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:41,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589244890] [2021-06-12 22:11:41,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589244890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:41,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633327448] [2021-06-12 22:11:41,257 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 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 [2021-06-12 22:11:41,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:11:41,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:41,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:11:41,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:41,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:41,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,970 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 40 treesize of output 20 [2021-06-12 22:11:41,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:41,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,978 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 55 treesize of output 24 [2021-06-12 22:11:41,979 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:41,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:41,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:41,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 24 [2021-06-12 22:11:41,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:41,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:41,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:41,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:41,996 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 51 treesize of output 25 [2021-06-12 22:11:41,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,011 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 44 treesize of output 14 [2021-06-12 22:11:42,012 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,020 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 56 treesize of output 28 [2021-06-12 22:11:42,020 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,028 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 23 [2021-06-12 22:11:42,028 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,036 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 38 treesize of output 20 [2021-06-12 22:11:42,037 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,045 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 18 [2021-06-12 22:11:42,046 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,053 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 18 [2021-06-12 22:11:42,054 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,061 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 53 treesize of output 24 [2021-06-12 22:11:42,062 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,069 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 34 treesize of output 12 [2021-06-12 22:11:42,070 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,077 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 45 treesize of output 23 [2021-06-12 22:11:42,078 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,085 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 47 treesize of output 25 [2021-06-12 22:11:42,089 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,096 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 52 treesize of output 28 [2021-06-12 22:11:42,097 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:42,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:42,101 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 44 treesize of output 18 [2021-06-12 22:11:42,102 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,124 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-12 22:11:42,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:11:42,125 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-12 22:11:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:42,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633327448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:42,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:42,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:11:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48629339] [2021-06-12 22:11:42,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:11:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:42,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:11:42,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:11:42,151 INFO L87 Difference]: Start difference. First operand 1150 states and 3857 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:42,836 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-06-12 22:11:43,510 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2021-06-12 22:11:43,689 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 66 [2021-06-12 22:11:43,846 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 73 [2021-06-12 22:11:44,187 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-06-12 22:11:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:44,286 INFO L93 Difference]: Finished difference Result 1615 states and 5216 transitions. [2021-06-12 22:11:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:11:44,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:44,289 INFO L225 Difference]: With dead ends: 1615 [2021-06-12 22:11:44,289 INFO L226 Difference]: Without dead ends: 1600 [2021-06-12 22:11:44,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2256.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:11:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-12 22:11:44,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1180. [2021-06-12 22:11:44,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.340966921119593) internal successors, (3939), 1179 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:44,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3939 transitions. [2021-06-12 22:11:44,303 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3939 transitions. Word has length 26 [2021-06-12 22:11:44,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:44,303 INFO L482 AbstractCegarLoop]: Abstraction has 1180 states and 3939 transitions. [2021-06-12 22:11:44,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:44,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3939 transitions. [2021-06-12 22:11:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:44,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:44,305 INFO L472 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] [2021-06-12 22:11:44,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 22:11:44,505 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:44,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1638740299, now seen corresponding path program 6 times [2021-06-12 22:11:44,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:44,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398943108] [2021-06-12 22:11:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:45,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:45,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398943108] [2021-06-12 22:11:45,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398943108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:45,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128310070] [2021-06-12 22:11:45,125 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 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 [2021-06-12 22:11:45,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:11:45,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:45,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:11:45,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:45,607 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-06-12 22:11:45,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:45,663 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 26 treesize of output 16 [2021-06-12 22:11:45,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,805 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-12 22:11:45,805 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.6 percent of original size [2021-06-12 22:11:45,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:45,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:45,811 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 25 treesize of output 15 [2021-06-12 22:11:45,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 22:11:45,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,909 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.8 percent of original size [2021-06-12 22:11:45,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:45,914 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 34 treesize of output 20 [2021-06-12 22:11:45,915 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:45,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:45,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:45,956 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 21 [2021-06-12 22:11:45,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:45,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:11:45,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:11:45,992 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-12 22:11:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:46,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128310070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:46,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:46,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:11:46,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457931828] [2021-06-12 22:11:46,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:11:46,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:11:46,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:11:46,063 INFO L87 Difference]: Start difference. First operand 1180 states and 3939 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:46,272 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 38 [2021-06-12 22:11:47,043 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 22:11:47,337 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2021-06-12 22:11:47,491 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-06-12 22:11:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:47,583 INFO L93 Difference]: Finished difference Result 1620 states and 5225 transitions. [2021-06-12 22:11:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:11:47,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:47,585 INFO L225 Difference]: With dead ends: 1620 [2021-06-12 22:11:47,586 INFO L226 Difference]: Without dead ends: 1605 [2021-06-12 22:11:47,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 2085.4ms TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:11:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2021-06-12 22:11:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1189. [2021-06-12 22:11:47,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 3.3383838383838382) internal successors, (3966), 1188 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3966 transitions. [2021-06-12 22:11:47,600 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3966 transitions. Word has length 26 [2021-06-12 22:11:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:47,600 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3966 transitions. [2021-06-12 22:11:47,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3966 transitions. [2021-06-12 22:11:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:47,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:47,601 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:47,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:11:47,802 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:47,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1105845433, now seen corresponding path program 37 times [2021-06-12 22:11:47,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:47,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888135223] [2021-06-12 22:11:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:48,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:48,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888135223] [2021-06-12 22:11:48,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888135223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:48,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764314024] [2021-06-12 22:11:48,290 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 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 [2021-06-12 22:11:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:48,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:11:48,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,907 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 34 treesize of output 12 [2021-06-12 22:11:48,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,915 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 44 treesize of output 14 [2021-06-12 22:11:48,915 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,923 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 53 treesize of output 24 [2021-06-12 22:11:48,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,931 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 56 treesize of output 28 [2021-06-12 22:11:48,932 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,943 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 23 [2021-06-12 22:11:48,943 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,951 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 55 treesize of output 24 [2021-06-12 22:11:48,951 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,959 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 47 treesize of output 25 [2021-06-12 22:11:48,960 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,968 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 38 treesize of output 20 [2021-06-12 22:11:48,968 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,976 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 64 treesize of output 24 [2021-06-12 22:11:48,978 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,986 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 18 [2021-06-12 22:11:48,986 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,994 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 52 treesize of output 28 [2021-06-12 22:11:48,994 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:48,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:48,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:48,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-12 22:11:49,003 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:49,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:49,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,009 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 44 treesize of output 18 [2021-06-12 22:11:49,010 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:49,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:49,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,017 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 45 treesize of output 23 [2021-06-12 22:11:49,017 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:49,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:49,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,023 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 40 treesize of output 20 [2021-06-12 22:11:49,024 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:49,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:49,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:11:49,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:11:49,028 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 18 [2021-06-12 22:11:49,029 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:49,066 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-12 22:11:49,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:11:49,070 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-12 22:11:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:49,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764314024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:49,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:49,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:11:49,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749577115] [2021-06-12 22:11:49,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:11:49,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:49,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:11:49,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:11:49,105 INFO L87 Difference]: Start difference. First operand 1189 states and 3966 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:50,372 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2021-06-12 22:11:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:11:51,190 INFO L93 Difference]: Finished difference Result 1800 states and 5747 transitions. [2021-06-12 22:11:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:11:51,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:11:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:11:51,198 INFO L225 Difference]: With dead ends: 1800 [2021-06-12 22:11:51,198 INFO L226 Difference]: Without dead ends: 1785 [2021-06-12 22:11:51,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2215.9ms TimeCoverageRelationStatistics Valid=311, Invalid=1329, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:11:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2021-06-12 22:11:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1201. [2021-06-12 22:11:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 3.3466666666666667) internal successors, (4016), 1200 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:51,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 4016 transitions. [2021-06-12 22:11:51,213 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 4016 transitions. Word has length 26 [2021-06-12 22:11:51,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:11:51,213 INFO L482 AbstractCegarLoop]: Abstraction has 1201 states and 4016 transitions. [2021-06-12 22:11:51,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:51,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 4016 transitions. [2021-06-12 22:11:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:11:51,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:11:51,215 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:11:51,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-12 22:11:51,415 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:11:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:11:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash -2082164277, now seen corresponding path program 38 times [2021-06-12 22:11:51,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:11:51,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784038903] [2021-06-12 22:11:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:11:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:11:51,790 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2021-06-12 22:11:51,908 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-06-12 22:11:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:52,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:11:52,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784038903] [2021-06-12 22:11:52,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784038903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:52,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874481186] [2021-06-12 22:11:52,065 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 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 [2021-06-12 22:11:52,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:11:52,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:11:52,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 22:11:52,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:11:52,544 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-12 22:11:52,544 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 48 [2021-06-12 22:11:52,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:52,605 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-12 22:11:52,605 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 51 [2021-06-12 22:11:52,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:52,662 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-12 22:11:52,662 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 59 [2021-06-12 22:11:52,685 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:52,731 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-12 22:11:52,732 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 41 [2021-06-12 22:11:52,743 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2021-06-12 22:11:52,787 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-06-12 22:11:52,788 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 41 [2021-06-12 22:11:52,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:52,813 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-12 22:11:52,813 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 1 [2021-06-12 22:11:52,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:52,867 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-12 22:11:52,867 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 62 treesize of output 68 [2021-06-12 22:11:52,902 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:52,951 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-06-12 22:11:52,951 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 44 [2021-06-12 22:11:52,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:52,993 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-12 22:11:52,993 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 34 [2021-06-12 22:11:52,994 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:53,052 INFO L354 Elim1Store]: treesize reduction 18, result has 61.7 percent of original size [2021-06-12 22:11:53,052 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 52 [2021-06-12 22:11:53,055 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:53,078 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-12 22:11:53,078 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 1 [2021-06-12 22:11:53,078 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:53,100 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-12 22:11:53,100 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 1 [2021-06-12 22:11:53,101 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:53,144 INFO L354 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2021-06-12 22:11:53,144 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 46 [2021-06-12 22:11:53,147 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:53,182 INFO L354 Elim1Store]: treesize reduction 34, result has 27.7 percent of original size [2021-06-12 22:11:53,183 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 33 [2021-06-12 22:11:53,184 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:53,215 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-06-12 22:11:53,215 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2021-06-12 22:11:53,216 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:53,255 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-06-12 22:11:53,255 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-12 22:11:53,269 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:11:53,883 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 81 [2021-06-12 22:11:53,883 INFO L628 ElimStorePlain]: treesize reduction 383, result has 51.8 percent of original size [2021-06-12 22:11:53,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:11:53,888 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1105, output treesize:411 [2021-06-12 22:11:54,118 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 22:11:54,296 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-06-12 22:11:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:11:54,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874481186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:11:54,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:11:54,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 22:11:54,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925862241] [2021-06-12 22:11:54,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:11:54,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:11:54,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:11:54,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:11:54,387 INFO L87 Difference]: Start difference. First operand 1201 states and 4016 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:11:54,844 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-06-12 22:11:55,410 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-12 22:11:55,652 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70 [2021-06-12 22:11:56,817 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 65 [2021-06-12 22:11:56,958 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-06-12 22:11:57,243 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 51 [2021-06-12 22:11:57,719 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2021-06-12 22:11:58,176 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 87 [2021-06-12 22:11:58,511 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 84 [2021-06-12 22:11:58,756 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2021-06-12 22:11:59,465 WARN L205 SmtUtils]: Spent 614.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2021-06-12 22:12:00,118 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 105 [2021-06-12 22:12:00,772 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 116 [2021-06-12 22:12:01,285 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 91 [2021-06-12 22:12:01,989 WARN L205 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 104 [2021-06-12 22:12:02,170 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-12 22:12:02,373 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 22:12:02,572 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-12 22:12:02,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:02,700 INFO L93 Difference]: Finished difference Result 2410 states and 7510 transitions. [2021-06-12 22:12:02,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 22:12:02,700 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:02,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:02,703 INFO L225 Difference]: With dead ends: 2410 [2021-06-12 22:12:02,703 INFO L226 Difference]: Without dead ends: 2365 [2021-06-12 22:12:02,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 8552.8ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:12:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-06-12 22:12:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 1341. [2021-06-12 22:12:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1340 states have (on average 3.3007462686567166) internal successors, (4423), 1340 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:02,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 4423 transitions. [2021-06-12 22:12:02,722 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 4423 transitions. Word has length 26 [2021-06-12 22:12:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:02,722 INFO L482 AbstractCegarLoop]: Abstraction has 1341 states and 4423 transitions. [2021-06-12 22:12:02,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 4423 transitions. [2021-06-12 22:12:02,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:02,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:02,724 INFO L472 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] [2021-06-12 22:12:02,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:02,924 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:02,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:02,925 INFO L82 PathProgramCache]: Analyzing trace with hash 127735791, now seen corresponding path program 7 times [2021-06-12 22:12:02,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:02,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484470439] [2021-06-12 22:12:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:03,263 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-06-12 22:12:03,459 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-06-12 22:12:03,641 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-06-12 22:12:03,821 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-12 22:12:03,946 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-06-12 22:12:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:03,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:03,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484470439] [2021-06-12 22:12:03,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484470439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:03,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364178733] [2021-06-12 22:12:03,987 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 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 [2021-06-12 22:12:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:04,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:12:04,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:04,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,448 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 39 treesize of output 23 [2021-06-12 22:12:04,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,454 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 39 treesize of output 23 [2021-06-12 22:12:04,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,460 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 31 treesize of output 16 [2021-06-12 22:12:04,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,467 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 26 treesize of output 16 [2021-06-12 22:12:04,467 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,473 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 21 [2021-06-12 22:12:04,474 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,479 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 44 treesize of output 26 [2021-06-12 22:12:04,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,485 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 31 treesize of output 16 [2021-06-12 22:12:04,486 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,491 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 18 [2021-06-12 22:12:04,497 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,502 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 18 [2021-06-12 22:12:04,502 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,508 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 [2021-06-12 22:12:04,508 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,513 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 21 treesize of output 10 [2021-06-12 22:12:04,514 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,520 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 44 treesize of output 26 [2021-06-12 22:12:04,521 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,526 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 21 [2021-06-12 22:12:04,527 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,532 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 [2021-06-12 22:12:04,532 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,538 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 41 treesize of output 22 [2021-06-12 22:12:04,538 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:04,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:04,542 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 26 treesize of output 16 [2021-06-12 22:12:04,542 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:04,603 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-06-12 22:12:04,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:12:04,604 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-12 22:12:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:04,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364178733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:04,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:04,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:12:04,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560068606] [2021-06-12 22:12:04,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:04,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:04,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:04,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:04,648 INFO L87 Difference]: Start difference. First operand 1341 states and 4423 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:05,347 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2021-06-12 22:12:05,586 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-06-12 22:12:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:05,927 INFO L93 Difference]: Finished difference Result 1736 states and 5612 transitions. [2021-06-12 22:12:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:12:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:05,930 INFO L225 Difference]: With dead ends: 1736 [2021-06-12 22:12:05,930 INFO L226 Difference]: Without dead ends: 1721 [2021-06-12 22:12:05,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1964.6ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:12:05,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2021-06-12 22:12:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1352. [2021-06-12 22:12:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.298297557364915) internal successors, (4456), 1351 states have internal predecessors, (4456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4456 transitions. [2021-06-12 22:12:05,954 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4456 transitions. Word has length 26 [2021-06-12 22:12:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:05,954 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4456 transitions. [2021-06-12 22:12:05,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4456 transitions. [2021-06-12 22:12:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:05,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:05,955 INFO L472 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] [2021-06-12 22:12:06,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-12 22:12:06,169 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:06,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1900662225, now seen corresponding path program 8 times [2021-06-12 22:12:06,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:06,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221095184] [2021-06-12 22:12:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:06,476 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-12 22:12:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:06,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:06,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221095184] [2021-06-12 22:12:06,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221095184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:06,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669356005] [2021-06-12 22:12:06,787 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 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 [2021-06-12 22:12:06,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:06,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:06,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:12:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:07,157 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-12 22:12:07,256 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:12:07,257 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-12 22:12:07,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,419 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2021-06-12 22:12:07,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:07,443 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:12:07,443 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 75 [2021-06-12 22:12:07,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,609 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2021-06-12 22:12:07,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:07,631 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:12:07,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-06-12 22:12:07,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,789 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2021-06-12 22:12:07,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:07,810 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:12:07,810 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 49 [2021-06-12 22:12:07,812 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:07,965 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2021-06-12 22:12:07,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:07,985 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:12:07,985 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-12 22:12:07,986 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:08,146 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2021-06-12 22:12:08,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:08,167 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:12:08,167 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 57 [2021-06-12 22:12:08,171 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:08,460 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 127 [2021-06-12 22:12:08,460 INFO L628 ElimStorePlain]: treesize reduction 16, result has 96.2 percent of original size [2021-06-12 22:12:08,479 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:12:08,479 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-12 22:12:08,482 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:08,746 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-06-12 22:12:08,747 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.8 percent of original size [2021-06-12 22:12:08,766 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:12:08,766 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 63 [2021-06-12 22:12:08,767 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:08,896 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-06-12 22:12:08,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:08,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:12:08,913 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:743, output treesize:480 [2021-06-12 22:12:09,178 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-06-12 22:12:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:09,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669356005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:09,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:09,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:12:09,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900128608] [2021-06-12 22:12:09,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:12:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:12:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:12:09,344 INFO L87 Difference]: Start difference. First operand 1352 states and 4456 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:10,077 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-06-12 22:12:10,522 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2021-06-12 22:12:10,678 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-12 22:12:10,875 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2021-06-12 22:12:11,219 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-06-12 22:12:11,385 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2021-06-12 22:12:11,581 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2021-06-12 22:12:11,723 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-12 22:12:12,007 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-06-12 22:12:12,191 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-12 22:12:12,469 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2021-06-12 22:12:12,935 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 80 [2021-06-12 22:12:13,382 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2021-06-12 22:12:13,808 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-06-12 22:12:14,308 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2021-06-12 22:12:14,589 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-06-12 22:12:14,834 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2021-06-12 22:12:14,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:14,911 INFO L93 Difference]: Finished difference Result 2040 states and 6414 transitions. [2021-06-12 22:12:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:12:14,911 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:14,913 INFO L225 Difference]: With dead ends: 2040 [2021-06-12 22:12:14,913 INFO L226 Difference]: Without dead ends: 2025 [2021-06-12 22:12:14,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 5956.1ms TimeCoverageRelationStatistics Valid=332, Invalid=1648, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:12:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-06-12 22:12:14,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1363. [2021-06-12 22:12:14,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 3.3069016152716593) internal successors, (4504), 1362 states have internal predecessors, (4504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 4504 transitions. [2021-06-12 22:12:14,931 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 4504 transitions. Word has length 26 [2021-06-12 22:12:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:14,932 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 4504 transitions. [2021-06-12 22:12:14,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:14,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 4504 transitions. [2021-06-12 22:12:14,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:14,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:14,933 INFO L472 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] [2021-06-12 22:12:15,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-12 22:12:15,134 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:15,134 INFO L82 PathProgramCache]: Analyzing trace with hash 456895363, now seen corresponding path program 9 times [2021-06-12 22:12:15,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:15,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645542917] [2021-06-12 22:12:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:15,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:15,401 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-06-12 22:12:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:15,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:15,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645542917] [2021-06-12 22:12:15,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645542917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:15,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726702582] [2021-06-12 22:12:15,711 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 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 [2021-06-12 22:12:15,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:15,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:15,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:12:15,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:16,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:16,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:16,423 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 21 [2021-06-12 22:12:16,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:16,430 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 18 [2021-06-12 22:12:16,431 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,626 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-06-12 22:12:16,627 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-12 22:12:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,632 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 16 treesize of output 10 [2021-06-12 22:12:16,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:16,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:16,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,706 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 26 treesize of output 16 [2021-06-12 22:12:16,707 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:16,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:16,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:16,775 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:12:16,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:16,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:16,781 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 34 treesize of output 20 [2021-06-12 22:12:16,782 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:16,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:16,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:12:16,836 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-12 22:12:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:16,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726702582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:16,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:16,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:12:16,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375308719] [2021-06-12 22:12:16,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:16,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:16,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:16,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:16,902 INFO L87 Difference]: Start difference. First operand 1363 states and 4504 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:17,110 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2021-06-12 22:12:17,756 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2021-06-12 22:12:17,968 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-12 22:12:18,262 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 62 [2021-06-12 22:12:18,637 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-06-12 22:12:18,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:18,760 INFO L93 Difference]: Finished difference Result 1593 states and 5152 transitions. [2021-06-12 22:12:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:12:18,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:18,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:18,762 INFO L225 Difference]: With dead ends: 1593 [2021-06-12 22:12:18,763 INFO L226 Difference]: Without dead ends: 1578 [2021-06-12 22:12:18,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 2312.1ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:12:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-12 22:12:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1372. [2021-06-12 22:12:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-12 22:12:18,778 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-12 22:12:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:18,778 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-12 22:12:18,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-12 22:12:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:18,780 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:18,780 INFO L472 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] [2021-06-12 22:12:18,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:18,980 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash 289086271, now seen corresponding path program 10 times [2021-06-12 22:12:18,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:18,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641472030] [2021-06-12 22:12:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:19,292 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 61 [2021-06-12 22:12:19,460 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2021-06-12 22:12:19,605 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 22:12:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:19,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:19,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641472030] [2021-06-12 22:12:19,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641472030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:19,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024380107] [2021-06-12 22:12:19,835 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 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 [2021-06-12 22:12:19,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:12:19,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:19,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:12:19,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:20,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-06-12 22:12:20,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,222 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 18 [2021-06-12 22:12:20,223 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,229 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 41 treesize of output 22 [2021-06-12 22:12:20,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,242 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 21 treesize of output 10 [2021-06-12 22:12:20,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,249 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 21 [2021-06-12 22:12:20,249 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,255 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 44 treesize of output 26 [2021-06-12 22:12:20,256 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,262 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 31 treesize of output 16 [2021-06-12 22:12:20,263 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,269 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 26 treesize of output 16 [2021-06-12 22:12:20,270 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,276 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 39 treesize of output 23 [2021-06-12 22:12:20,277 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,283 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 44 treesize of output 26 [2021-06-12 22:12:20,284 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,290 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 26 treesize of output 16 [2021-06-12 22:12:20,290 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,296 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 21 [2021-06-12 22:12:20,296 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,302 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 31 treesize of output 16 [2021-06-12 22:12:20,303 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,308 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:12:20,308 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,313 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 18 [2021-06-12 22:12:20,314 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:20,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:20,317 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 39 treesize of output 23 [2021-06-12 22:12:20,318 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:20,378 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-12 22:12:20,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:12:20,380 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-12 22:12:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:20,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024380107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:20,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:20,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:12:20,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409561971] [2021-06-12 22:12:20,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:12:20,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:12:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:12:20,430 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:12:20,817 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2021-06-12 22:12:21,079 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-12 22:12:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:21,332 INFO L93 Difference]: Finished difference Result 1674 states and 5467 transitions. [2021-06-12 22:12:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:12:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:21,334 INFO L225 Difference]: With dead ends: 1674 [2021-06-12 22:12:21,334 INFO L226 Difference]: Without dead ends: 1659 [2021-06-12 22:12:21,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1512.5ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:12:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-06-12 22:12:21,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1372. [2021-06-12 22:12:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 3.311451495258935) internal successors, (4540), 1371 states have internal predecessors, (4540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:21,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 4540 transitions. [2021-06-12 22:12:21,349 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 4540 transitions. Word has length 26 [2021-06-12 22:12:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:21,349 INFO L482 AbstractCegarLoop]: Abstraction has 1372 states and 4540 transitions. [2021-06-12 22:12:21,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:12:21,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 4540 transitions. [2021-06-12 22:12:21,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:21,351 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:21,351 INFO L472 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] [2021-06-12 22:12:21,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-12 22:12:21,552 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1778429757, now seen corresponding path program 11 times [2021-06-12 22:12:21,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:21,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146739839] [2021-06-12 22:12:21,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:21,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:21,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146739839] [2021-06-12 22:12:21,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146739839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:21,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457182698] [2021-06-12 22:12:21,981 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 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 [2021-06-12 22:12:22,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:12:22,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:22,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:12:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:22,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:22,612 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:22,613 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 29 [2021-06-12 22:12:22,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:22,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:22,633 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:22,633 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 30 [2021-06-12 22:12:22,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:22,828 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2021-06-12 22:12:22,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:22,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:22,847 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 39 [2021-06-12 22:12:22,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:22,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:22,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:22,864 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 44 treesize of output 42 [2021-06-12 22:12:22,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,034 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-06-12 22:12:23,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:23,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:23,052 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 21 treesize of output 29 [2021-06-12 22:12:23,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,075 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:23,075 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 26 treesize of output 28 [2021-06-12 22:12:23,078 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,236 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 22:12:23,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,256 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:12:23,256 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 26 treesize of output 24 [2021-06-12 22:12:23,257 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:23,275 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:12:23,275 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 31 treesize of output 31 [2021-06-12 22:12:23,276 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:23,425 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:12:23,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:23,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:12:23,447 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 12 variables, input treesize:401, output treesize:389 [2021-06-12 22:12:23,640 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-06-12 22:12:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457182698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:23,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:23,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:12:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099359913] [2021-06-12 22:12:23,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:12:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:12:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:12:23,733 INFO L87 Difference]: Start difference. First operand 1372 states and 4540 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:24,168 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2021-06-12 22:12:24,323 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2021-06-12 22:12:24,649 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-06-12 22:12:25,239 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2021-06-12 22:12:25,601 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 96 [2021-06-12 22:12:25,740 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-06-12 22:12:26,090 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 85 [2021-06-12 22:12:26,285 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-12 22:12:26,604 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2021-06-12 22:12:27,056 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 88 [2021-06-12 22:12:27,337 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-06-12 22:12:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:27,444 INFO L93 Difference]: Finished difference Result 2311 states and 7396 transitions. [2021-06-12 22:12:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:12:27,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:27,448 INFO L225 Difference]: With dead ends: 2311 [2021-06-12 22:12:27,448 INFO L226 Difference]: Without dead ends: 2281 [2021-06-12 22:12:27,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 3969.1ms TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:12:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2021-06-12 22:12:27,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 1375. [2021-06-12 22:12:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.3151382823871907) internal successors, (4555), 1374 states have internal predecessors, (4555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:27,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4555 transitions. [2021-06-12 22:12:27,468 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4555 transitions. Word has length 26 [2021-06-12 22:12:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:27,468 INFO L482 AbstractCegarLoop]: Abstraction has 1375 states and 4555 transitions. [2021-06-12 22:12:27,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4555 transitions. [2021-06-12 22:12:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:27,470 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:27,470 INFO L472 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] [2021-06-12 22:12:27,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:27,671 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:27,671 INFO L82 PathProgramCache]: Analyzing trace with hash -746246473, now seen corresponding path program 12 times [2021-06-12 22:12:27,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:27,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742935602] [2021-06-12 22:12:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:27,895 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2021-06-12 22:12:28,031 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-12 22:12:28,155 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2021-06-12 22:12:28,287 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-06-12 22:12:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:28,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:28,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742935602] [2021-06-12 22:12:28,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742935602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:28,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5617133] [2021-06-12 22:12:28,434 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 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 [2021-06-12 22:12:28,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:12:28,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:12:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:28,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,729 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-12 22:12:28,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,743 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:28,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-12 22:12:28,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:28,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-12 22:12:28,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,771 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-12 22:12:28,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,783 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-12 22:12:28,783 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,795 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-12 22:12:28,795 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,808 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-12 22:12:28,809 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,822 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:12:28,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:12:28,824 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,836 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-12 22:12:28,837 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,849 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-12 22:12:28,850 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-12 22:12:28,860 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,872 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 22:12:28,872 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:28,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-06-12 22:12:28,901 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:28,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-12 22:12:28,915 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,925 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 22:12:28,926 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:28,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:28,932 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:12:28,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:12:28,933 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:29,033 INFO L628 ElimStorePlain]: treesize reduction 54, result has 61.4 percent of original size [2021-06-12 22:12:29,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:12:29,034 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-12 22:12:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:29,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5617133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:29,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:29,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:12:29,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505836144] [2021-06-12 22:12:29,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:29,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:29,157 INFO L87 Difference]: Start difference. First operand 1375 states and 4555 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:29,836 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2021-06-12 22:12:30,058 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2021-06-12 22:12:30,260 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-12 22:12:30,381 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-12 22:12:30,557 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2021-06-12 22:12:30,801 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-06-12 22:12:30,977 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2021-06-12 22:12:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:31,519 INFO L93 Difference]: Finished difference Result 1790 states and 5831 transitions. [2021-06-12 22:12:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:12:31,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:31,522 INFO L225 Difference]: With dead ends: 1790 [2021-06-12 22:12:31,522 INFO L226 Difference]: Without dead ends: 1775 [2021-06-12 22:12:31,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2724.1ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:12:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2021-06-12 22:12:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1378. [2021-06-12 22:12:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 3.316630355846042) internal successors, (4567), 1377 states have internal predecessors, (4567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 4567 transitions. [2021-06-12 22:12:31,539 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 4567 transitions. Word has length 26 [2021-06-12 22:12:31,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:31,539 INFO L482 AbstractCegarLoop]: Abstraction has 1378 states and 4567 transitions. [2021-06-12 22:12:31,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 4567 transitions. [2021-06-12 22:12:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:31,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:31,541 INFO L472 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] [2021-06-12 22:12:31,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-12 22:12:31,741 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:31,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:31,742 INFO L82 PathProgramCache]: Analyzing trace with hash 148423883, now seen corresponding path program 13 times [2021-06-12 22:12:31,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:31,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321739405] [2021-06-12 22:12:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:31,929 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2021-06-12 22:12:32,038 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-06-12 22:12:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:32,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:32,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321739405] [2021-06-12 22:12:32,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321739405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:32,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531043159] [2021-06-12 22:12:32,256 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 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 [2021-06-12 22:12:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:12:32,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:32,749 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 22:12:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:32,819 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:12:32,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-12 22:12:32,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:32,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:32,838 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:12:32,839 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 57 [2021-06-12 22:12:32,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:33,002 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-06-12 22:12:33,002 INFO L628 ElimStorePlain]: treesize reduction 211, result has 55.7 percent of original size [2021-06-12 22:12:33,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:33,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-06-12 22:12:33,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:33,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:33,026 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:12:33,026 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 50 [2021-06-12 22:12:33,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:33,123 INFO L628 ElimStorePlain]: treesize reduction 19, result has 90.4 percent of original size [2021-06-12 22:12:33,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:33,132 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:12:33,132 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 30 [2021-06-12 22:12:33,133 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:33,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:33,188 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:12:33,188 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 78 treesize of output 53 [2021-06-12 22:12:33,189 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:33,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:33,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:12:33,223 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:619, output treesize:64 [2021-06-12 22:12:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:33,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531043159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:33,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:33,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:12:33,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637738353] [2021-06-12 22:12:33,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:33,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:33,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:33,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:33,293 INFO L87 Difference]: Start difference. First operand 1378 states and 4567 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:34,058 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-06-12 22:12:34,525 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2021-06-12 22:12:34,745 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2021-06-12 22:12:35,042 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-12 22:12:35,253 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-12 22:12:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:35,408 INFO L93 Difference]: Finished difference Result 2164 states and 6833 transitions. [2021-06-12 22:12:35,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:12:35,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:35,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:35,411 INFO L225 Difference]: With dead ends: 2164 [2021-06-12 22:12:35,411 INFO L226 Difference]: Without dead ends: 2149 [2021-06-12 22:12:35,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2382.2ms TimeCoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:12:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-12 22:12:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1380. [2021-06-12 22:12:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 3.3168963016678754) internal successors, (4574), 1379 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:35,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 4574 transitions. [2021-06-12 22:12:35,429 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 4574 transitions. Word has length 26 [2021-06-12 22:12:35,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:35,430 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 4574 transitions. [2021-06-12 22:12:35,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:35,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 4574 transitions. [2021-06-12 22:12:35,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:35,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:35,431 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:12:35,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-12 22:12:35,633 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:35,633 INFO L82 PathProgramCache]: Analyzing trace with hash -806418041, now seen corresponding path program 39 times [2021-06-12 22:12:35,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:35,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137861388] [2021-06-12 22:12:35,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:36,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137861388] [2021-06-12 22:12:36,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137861388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:36,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223903590] [2021-06-12 22:12:36,265 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 [2021-06-12 22:12:36,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:36,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:36,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:12:36,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:36,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,630 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 42 treesize of output 20 [2021-06-12 22:12:36,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,644 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 49 treesize of output 23 [2021-06-12 22:12:36,645 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,654 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 50 treesize of output 18 [2021-06-12 22:12:36,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,664 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 70 treesize of output 24 [2021-06-12 22:12:36,665 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,674 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 44 treesize of output 20 [2021-06-12 22:12:36,675 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,685 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 45 treesize of output 18 [2021-06-12 22:12:36,685 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,696 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 38 treesize of output 12 [2021-06-12 22:12:36,696 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,708 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 51 treesize of output 25 [2021-06-12 22:12:36,709 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,720 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 18 [2021-06-12 22:12:36,720 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,729 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 62 treesize of output 28 [2021-06-12 22:12:36,730 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,739 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 49 treesize of output 23 [2021-06-12 22:12:36,740 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,749 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 61 treesize of output 24 [2021-06-12 22:12:36,749 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,759 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 48 treesize of output 14 [2021-06-12 22:12:36,760 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,769 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 57 treesize of output 24 [2021-06-12 22:12:36,770 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,777 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 57 treesize of output 25 [2021-06-12 22:12:36,778 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:12:36,783 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 58 treesize of output 28 [2021-06-12 22:12:36,783 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:36,834 INFO L628 ElimStorePlain]: treesize reduction 50, result has 49.5 percent of original size [2021-06-12 22:12:36,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:12:36,835 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1097, output treesize:49 [2021-06-12 22:12:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:36,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223903590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:36,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:36,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-12 22:12:36,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890493027] [2021-06-12 22:12:36,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:12:36,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:36,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:12:36,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:12:36,941 INFO L87 Difference]: Start difference. First operand 1380 states and 4574 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:37,367 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-06-12 22:12:37,759 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 87 [2021-06-12 22:12:38,241 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2021-06-12 22:12:38,882 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 84 [2021-06-12 22:12:39,904 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2021-06-12 22:12:40,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:40,301 INFO L93 Difference]: Finished difference Result 3078 states and 9474 transitions. [2021-06-12 22:12:40,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:12:40,302 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:40,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:40,305 INFO L225 Difference]: With dead ends: 3078 [2021-06-12 22:12:40,305 INFO L226 Difference]: Without dead ends: 2991 [2021-06-12 22:12:40,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 3505.5ms TimeCoverageRelationStatistics Valid=542, Invalid=2764, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:12:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-12 22:12:40,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1413. [2021-06-12 22:12:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3208215297450425) internal successors, (4689), 1412 states have internal predecessors, (4689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:40,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4689 transitions. [2021-06-12 22:12:40,327 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4689 transitions. Word has length 26 [2021-06-12 22:12:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:40,327 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4689 transitions. [2021-06-12 22:12:40,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:40,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4689 transitions. [2021-06-12 22:12:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:40,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:40,329 INFO L472 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] [2021-06-12 22:12:40,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:12:40,530 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:40,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1738294259, now seen corresponding path program 14 times [2021-06-12 22:12:40,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:40,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786821642] [2021-06-12 22:12:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:40,841 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2021-06-12 22:12:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:41,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:41,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786821642] [2021-06-12 22:12:41,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786821642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:41,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241865606] [2021-06-12 22:12:41,022 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 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 [2021-06-12 22:12:41,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:12:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:12:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:41,427 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 22:12:41,837 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2021-06-12 22:12:42,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:42,111 INFO L354 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2021-06-12 22:12:42,111 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 89 [2021-06-12 22:12:42,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:42,130 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-06-12 22:12:42,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 1 [2021-06-12 22:12:42,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:42,665 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 197 [2021-06-12 22:12:42,666 INFO L628 ElimStorePlain]: treesize reduction 788, result has 46.3 percent of original size [2021-06-12 22:12:42,690 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:12:42,690 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 52 [2021-06-12 22:12:42,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:42,849 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2021-06-12 22:12:42,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:42,880 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-12 22:12:42,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 69 [2021-06-12 22:12:42,882 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,039 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2021-06-12 22:12:43,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:43,063 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:12:43,063 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 62 [2021-06-12 22:12:43,065 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,235 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 22:12:43,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:43,255 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:12:43,256 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 55 [2021-06-12 22:12:43,257 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,425 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-12 22:12:43,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:43,448 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:12:43,448 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2021-06-12 22:12:43,452 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,608 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-12 22:12:43,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:43,638 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-12 22:12:43,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 72 [2021-06-12 22:12:43,640 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,788 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:12:43,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:43,815 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-12 22:12:43,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 77 [2021-06-12 22:12:43,817 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:43,959 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-06-12 22:12:43,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:43,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:12:43,978 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1661, output treesize:498 [2021-06-12 22:12:44,200 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2021-06-12 22:12:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:44,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241865606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:44,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:44,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:12:44,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849852232] [2021-06-12 22:12:44,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:12:44,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:44,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:12:44,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:12:44,291 INFO L87 Difference]: Start difference. First operand 1413 states and 4689 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:44,878 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-12 22:12:45,060 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-06-12 22:12:45,212 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-06-12 22:12:45,519 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2021-06-12 22:12:45,762 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-12 22:12:45,937 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 73 [2021-06-12 22:12:46,160 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2021-06-12 22:12:46,498 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 76 [2021-06-12 22:12:47,136 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2021-06-12 22:12:48,739 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 277 DAG size of output: 259 [2021-06-12 22:12:49,399 WARN L205 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 113 [2021-06-12 22:12:49,926 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-06-12 22:12:50,595 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 112 [2021-06-12 22:12:52,402 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 274 DAG size of output: 258 [2021-06-12 22:12:54,336 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 303 DAG size of output: 279 [2021-06-12 22:12:54,895 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-12 22:12:55,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:12:55,323 INFO L93 Difference]: Finished difference Result 2106 states and 6748 transitions. [2021-06-12 22:12:55,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:12:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:12:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:12:55,326 INFO L225 Difference]: With dead ends: 2106 [2021-06-12 22:12:55,326 INFO L226 Difference]: Without dead ends: 2091 [2021-06-12 22:12:55,326 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 10740.0ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:12:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-12 22:12:55,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1409. [2021-06-12 22:12:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-12 22:12:55,344 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-12 22:12:55,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:12:55,344 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-12 22:12:55,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:55,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-12 22:12:55,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:12:55,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:12:55,346 INFO L472 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] [2021-06-12 22:12:55,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable609 [2021-06-12 22:12:55,546 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:12:55,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:12:55,546 INFO L82 PathProgramCache]: Analyzing trace with hash 120761479, now seen corresponding path program 15 times [2021-06-12 22:12:55,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:12:55,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344689732] [2021-06-12 22:12:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:12:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:12:55,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:55,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:12:55,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344689732] [2021-06-12 22:12:55,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344689732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:55,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319827269] [2021-06-12 22:12:55,963 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 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 [2021-06-12 22:12:55,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:12:55,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:12:55,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:12:55,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:12:56,350 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-12 22:12:56,424 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_80, v_prenex_87, v_prenex_85, v_prenex_78], 6=[v_prenex_83, A, v_prenex_76, v_prenex_89]} [2021-06-12 22:12:56,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:56,446 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:12:56,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:12:56,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:56,781 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 153 [2021-06-12 22:12:56,782 INFO L628 ElimStorePlain]: treesize reduction 413, result has 53.5 percent of original size [2021-06-12 22:12:56,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:56,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:56,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:12:56,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:56,940 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-12 22:12:56,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:56,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:56,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:56,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:12:56,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:57,084 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-12 22:12:57,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:57,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:57,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:57,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:12:57,099 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:57,226 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-12 22:12:57,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:57,242 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:12:57,242 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-12 22:12:57,243 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:57,365 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-12 22:12:57,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:57,385 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-12 22:12:57,385 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-12 22:12:57,386 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:57,500 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-12 22:12:57,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:57,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:57,520 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-12 22:12:57,520 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-12 22:12:57,522 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:57,628 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-06-12 22:12:57,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:57,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:12:57,640 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-12 22:12:57,640 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 31 [2021-06-12 22:12:57,642 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:12:57,745 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:12:57,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:12:57,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:12:57,753 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:903, output treesize:216 [2021-06-12 22:12:57,891 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-12 22:12:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:12:57,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319827269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:12:57,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:12:57,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:12:57,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040058926] [2021-06-12 22:12:57,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:12:57,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:12:57,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:12:57,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:12:57,970 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:12:58,357 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-06-12 22:12:58,614 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-12 22:12:58,755 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2021-06-12 22:12:59,591 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 82 [2021-06-12 22:12:59,915 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-12 22:13:00,092 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2021-06-12 22:13:00,779 WARN L205 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 79 [2021-06-12 22:13:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:01,188 INFO L93 Difference]: Finished difference Result 2320 states and 7312 transitions. [2021-06-12 22:13:01,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:13:01,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:01,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:01,191 INFO L225 Difference]: With dead ends: 2320 [2021-06-12 22:13:01,191 INFO L226 Difference]: Without dead ends: 2305 [2021-06-12 22:13:01,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 3321.7ms TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:13:01,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-12 22:13:01,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1409. [2021-06-12 22:13:01,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 3.319602272727273) internal successors, (4674), 1408 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4674 transitions. [2021-06-12 22:13:01,210 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4674 transitions. Word has length 26 [2021-06-12 22:13:01,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:01,210 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4674 transitions. [2021-06-12 22:13:01,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4674 transitions. [2021-06-12 22:13:01,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:01,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:01,212 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:01,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-06-12 22:13:01,412 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:01,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash 395894327, now seen corresponding path program 40 times [2021-06-12 22:13:01,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:01,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71623985] [2021-06-12 22:13:01,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:02,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71623985] [2021-06-12 22:13:02,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71623985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:02,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575557506] [2021-06-12 22:13:02,060 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 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 [2021-06-12 22:13:02,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:02,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:02,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:13:02,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:02,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,662 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 59 treesize of output 31 [2021-06-12 22:13:02,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,671 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 50 treesize of output 26 [2021-06-12 22:13:02,672 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,681 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 48 treesize of output 26 [2021-06-12 22:13:02,682 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,692 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 51 treesize of output 24 [2021-06-12 22:13:02,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,702 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 61 treesize of output 31 [2021-06-12 22:13:02,704 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,713 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 46 treesize of output 24 [2021-06-12 22:13:02,713 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,722 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 62 treesize of output 32 [2021-06-12 22:13:02,723 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,733 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 54 treesize of output 28 [2021-06-12 22:13:02,734 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,743 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 58 treesize of output 30 [2021-06-12 22:13:02,744 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,753 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 65 treesize of output 33 [2021-06-12 22:13:02,754 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,763 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 53 treesize of output 27 [2021-06-12 22:13:02,764 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,771 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 23 [2021-06-12 22:13:02,772 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,780 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 18 [2021-06-12 22:13:02,781 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,789 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 73 treesize of output 37 [2021-06-12 22:13:02,797 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,805 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 44 treesize of output 24 [2021-06-12 22:13:02,806 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:02,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:02,810 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 46 treesize of output 24 [2021-06-12 22:13:02,811 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:02,890 INFO L628 ElimStorePlain]: treesize reduction 346, result has 12.0 percent of original size [2021-06-12 22:13:02,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:13:02,891 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-06-12 22:13:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:02,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575557506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:02,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:02,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 22:13:02,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750167101] [2021-06-12 22:13:02,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:02,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:02,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:02,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:02,934 INFO L87 Difference]: Start difference. First operand 1409 states and 4674 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:03,524 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2021-06-12 22:13:03,908 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 78 [2021-06-12 22:13:04,095 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-06-12 22:13:04,640 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 73 [2021-06-12 22:13:04,814 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-12 22:13:05,199 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 79 [2021-06-12 22:13:05,536 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-12 22:13:05,974 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2021-06-12 22:13:06,137 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2021-06-12 22:13:06,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:06,488 INFO L93 Difference]: Finished difference Result 2743 states and 8648 transitions. [2021-06-12 22:13:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:13:06,488 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:06,492 INFO L225 Difference]: With dead ends: 2743 [2021-06-12 22:13:06,492 INFO L226 Difference]: Without dead ends: 2698 [2021-06-12 22:13:06,492 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 3651.3ms TimeCoverageRelationStatistics Valid=521, Invalid=2341, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:13:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2698 states. [2021-06-12 22:13:06,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2698 to 1412. [2021-06-12 22:13:06,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.3217576187101345) internal successors, (4687), 1411 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4687 transitions. [2021-06-12 22:13:06,512 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4687 transitions. Word has length 26 [2021-06-12 22:13:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:06,512 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4687 transitions. [2021-06-12 22:13:06,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:06,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4687 transitions. [2021-06-12 22:13:06,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:06,514 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:06,514 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:06,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-12 22:13:06,715 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:06,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:06,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2065424317, now seen corresponding path program 41 times [2021-06-12 22:13:06,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:06,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121672229] [2021-06-12 22:13:06,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:07,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:07,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121672229] [2021-06-12 22:13:07,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121672229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:07,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019496814] [2021-06-12 22:13:07,188 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 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 [2021-06-12 22:13:07,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:07,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:07,215 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 22:13:07,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:07,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,805 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:07,805 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 38 treesize of output 36 [2021-06-12 22:13:07,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,836 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:07,836 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 56 treesize of output 44 [2021-06-12 22:13:07,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,870 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:13:07,870 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 44 treesize of output 46 [2021-06-12 22:13:07,876 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,902 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:13:07,902 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 37 [2021-06-12 22:13:07,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,931 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:13:07,931 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 53 treesize of output 43 [2021-06-12 22:13:07,935 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,959 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:13:07,959 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 64 treesize of output 38 [2021-06-12 22:13:07,961 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,977 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:07,977 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 39 treesize of output 1 [2021-06-12 22:13:07,978 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:07,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:07,993 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:07,993 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 40 treesize of output 20 [2021-06-12 22:13:07,994 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,015 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:08,015 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 39 treesize of output 1 [2021-06-12 22:13:08,015 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,049 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:13:08,049 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 44 treesize of output 48 [2021-06-12 22:13:08,052 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,067 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:08,067 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 45 treesize of output 1 [2021-06-12 22:13:08,068 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,082 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:08,082 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 18 [2021-06-12 22:13:08,083 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,099 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:08,099 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 51 treesize of output 1 [2021-06-12 22:13:08,099 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,123 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-12 22:13:08,124 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 52 treesize of output 35 [2021-06-12 22:13:08,125 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,140 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:08,140 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 47 treesize of output 1 [2021-06-12 22:13:08,141 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:08,150 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:13:08,151 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 55 treesize of output 1 [2021-06-12 22:13:08,151 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:08,276 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-06-12 22:13:08,277 INFO L628 ElimStorePlain]: treesize reduction 202, result has 36.7 percent of original size [2021-06-12 22:13:08,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:13:08,279 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:103 [2021-06-12 22:13:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:08,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019496814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:08,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:08,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-12 22:13:08,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355467359] [2021-06-12 22:13:08,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:13:08,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:08,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:13:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:13:08,444 INFO L87 Difference]: Start difference. First operand 1412 states and 4687 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:08,831 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-12 22:13:09,112 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-12 22:13:09,333 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2021-06-12 22:13:10,005 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2021-06-12 22:13:10,424 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 22:13:10,657 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-12 22:13:10,911 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-12 22:13:11,158 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2021-06-12 22:13:11,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:11,422 INFO L93 Difference]: Finished difference Result 2483 states and 7959 transitions. [2021-06-12 22:13:11,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 22:13:11,424 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:11,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:11,427 INFO L225 Difference]: With dead ends: 2483 [2021-06-12 22:13:11,427 INFO L226 Difference]: Without dead ends: 2453 [2021-06-12 22:13:11,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 3013.3ms TimeCoverageRelationStatistics Valid=451, Invalid=1999, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:13:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-06-12 22:13:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 1413. [2021-06-12 22:13:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.3236543909348444) internal successors, (4693), 1412 states have internal predecessors, (4693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4693 transitions. [2021-06-12 22:13:11,448 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4693 transitions. Word has length 26 [2021-06-12 22:13:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:11,448 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 4693 transitions. [2021-06-12 22:13:11,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4693 transitions. [2021-06-12 22:13:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:11,450 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:11,450 INFO L472 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] [2021-06-12 22:13:11,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable767 [2021-06-12 22:13:11,666 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash 386531115, now seen corresponding path program 16 times [2021-06-12 22:13:11,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:11,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543050684] [2021-06-12 22:13:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:11,860 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2021-06-12 22:13:11,992 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-06-12 22:13:12,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:12,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:12,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543050684] [2021-06-12 22:13:12,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543050684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:12,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134735559] [2021-06-12 22:13:12,257 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 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 [2021-06-12 22:13:12,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:12,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:12,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:13:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:12,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,688 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 41 treesize of output 22 [2021-06-12 22:13:12,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,695 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 31 treesize of output 16 [2021-06-12 22:13:12,696 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,714 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 18 [2021-06-12 22:13:12,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,722 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-06-12 22:13:12,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,728 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 44 treesize of output 26 [2021-06-12 22:13:12,729 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,735 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 21 treesize of output 10 [2021-06-12 22:13:12,736 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,743 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 21 [2021-06-12 22:13:12,744 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,751 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 [2021-06-12 22:13:12,752 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,759 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 18 [2021-06-12 22:13:12,760 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,767 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 39 treesize of output 23 [2021-06-12 22:13:12,768 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,775 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 26 [2021-06-12 22:13:12,776 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,782 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 26 treesize of output 16 [2021-06-12 22:13:12,783 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,790 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 31 treesize of output 16 [2021-06-12 22:13:12,791 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,797 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 21 [2021-06-12 22:13:12,798 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,804 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:13:12,804 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:12,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:12,808 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 [2021-06-12 22:13:12,809 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:12,883 INFO L628 ElimStorePlain]: treesize reduction 73, result has 46.7 percent of original size [2021-06-12 22:13:12,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:13:12,885 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-12 22:13:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:12,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134735559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:12,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:12,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:12,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131967404] [2021-06-12 22:13:12,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:12,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:12,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:12,932 INFO L87 Difference]: Start difference. First operand 1413 states and 4693 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:13,481 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2021-06-12 22:13:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:13,805 INFO L93 Difference]: Finished difference Result 1799 states and 5861 transitions. [2021-06-12 22:13:13,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:13:13,805 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:13,807 INFO L225 Difference]: With dead ends: 1799 [2021-06-12 22:13:13,807 INFO L226 Difference]: Without dead ends: 1784 [2021-06-12 22:13:13,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1350.3ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:13:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-06-12 22:13:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1422. [2021-06-12 22:13:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:13,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-12 22:13:13,824 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-12 22:13:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:13,824 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-12 22:13:13,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-12 22:13:13,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:13,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:13,826 INFO L472 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] [2021-06-12 22:13:14,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:14,027 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:14,027 INFO L82 PathProgramCache]: Analyzing trace with hash 715690687, now seen corresponding path program 17 times [2021-06-12 22:13:14,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:14,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644544933] [2021-06-12 22:13:14,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:14,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:14,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644544933] [2021-06-12 22:13:14,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644544933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:14,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656995725] [2021-06-12 22:13:14,537 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 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 [2021-06-12 22:13:14,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:14,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:13:14,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:14,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:14,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:14,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:14,991 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 18 [2021-06-12 22:13:14,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:14,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:14,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:14,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:14,996 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 44 treesize of output 26 [2021-06-12 22:13:14,997 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,002 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 44 treesize of output 26 [2021-06-12 22:13:15,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,008 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 31 treesize of output 16 [2021-06-12 22:13:15,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,015 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 26 treesize of output 16 [2021-06-12 22:13:15,015 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,020 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 41 treesize of output 22 [2021-06-12 22:13:15,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,026 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 30 treesize of output 18 [2021-06-12 22:13:15,027 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,032 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 [2021-06-12 22:13:15,033 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,038 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 26 treesize of output 16 [2021-06-12 22:13:15,039 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,044 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 39 treesize of output 23 [2021-06-12 22:13:15,045 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,051 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 [2021-06-12 22:13:15,051 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,056 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 21 [2021-06-12 22:13:15,057 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,062 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 21 treesize of output 10 [2021-06-12 22:13:15,063 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,067 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 39 treesize of output 23 [2021-06-12 22:13:15,068 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,073 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 31 treesize of output 16 [2021-06-12 22:13:15,073 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:15,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:15,076 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 21 [2021-06-12 22:13:15,077 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:15,140 INFO L628 ElimStorePlain]: treesize reduction 71, result has 47.4 percent of original size [2021-06-12 22:13:15,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:13:15,141 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:46 [2021-06-12 22:13:15,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:15,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656995725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:15,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:15,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:13:15,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862897720] [2021-06-12 22:13:15,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:13:15,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:15,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:13:15,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:15,188 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:15,601 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2021-06-12 22:13:15,751 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2021-06-12 22:13:16,034 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-12 22:13:16,194 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 66 [2021-06-12 22:13:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:16,669 INFO L93 Difference]: Finished difference Result 1615 states and 5256 transitions. [2021-06-12 22:13:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:13:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:16,671 INFO L225 Difference]: With dead ends: 1615 [2021-06-12 22:13:16,672 INFO L226 Difference]: Without dead ends: 1600 [2021-06-12 22:13:16,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1847.3ms TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:13:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1600 states. [2021-06-12 22:13:16,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1600 to 1431. [2021-06-12 22:13:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1431 states, 1430 states have (on average 3.327972027972028) internal successors, (4759), 1430 states have internal predecessors, (4759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1431 states to 1431 states and 4759 transitions. [2021-06-12 22:13:16,687 INFO L78 Accepts]: Start accepts. Automaton has 1431 states and 4759 transitions. Word has length 26 [2021-06-12 22:13:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:16,687 INFO L482 AbstractCegarLoop]: Abstraction has 1431 states and 4759 transitions. [2021-06-12 22:13:16,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states and 4759 transitions. [2021-06-12 22:13:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:16,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:16,689 INFO L472 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] [2021-06-12 22:13:16,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-12 22:13:16,890 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:16,891 INFO L82 PathProgramCache]: Analyzing trace with hash 547881595, now seen corresponding path program 18 times [2021-06-12 22:13:16,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:16,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576385663] [2021-06-12 22:13:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:17,165 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2021-06-12 22:13:17,363 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 57 [2021-06-12 22:13:17,588 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2021-06-12 22:13:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:17,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:17,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576385663] [2021-06-12 22:13:17,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576385663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:17,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187899685] [2021-06-12 22:13:17,781 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 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 [2021-06-12 22:13:17,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:17,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:17,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:13:17,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:18,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:18,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:13:18,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,165 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 22:13:18,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:18,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:13:18,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,188 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:13:18,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,198 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:13:18,198 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,208 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:13:18,209 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,218 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:13:18,218 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,227 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-12 22:13:18,228 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,239 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:13:18,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-12 22:13:18,240 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,249 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:13:18,250 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,258 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:13:18,259 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,269 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-12 22:13:18,270 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,280 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:13:18,281 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,291 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:13:18,291 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:18,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:13:18,312 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:18,319 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:18,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:13:18,320 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:18,405 INFO L628 ElimStorePlain]: treesize reduction 55, result has 61.8 percent of original size [2021-06-12 22:13:18,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:13:18,409 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:761, output treesize:88 [2021-06-12 22:13:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:18,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187899685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:18,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:18,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 22:13:18,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570813871] [2021-06-12 22:13:18,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:18,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:18,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:18,543 INFO L87 Difference]: Start difference. First operand 1431 states and 4759 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:19,202 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2021-06-12 22:13:19,329 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2021-06-12 22:13:19,662 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-12 22:13:19,866 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2021-06-12 22:13:20,202 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-06-12 22:13:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:20,267 INFO L93 Difference]: Finished difference Result 1909 states and 6216 transitions. [2021-06-12 22:13:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:13:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:20,269 INFO L225 Difference]: With dead ends: 1909 [2021-06-12 22:13:20,269 INFO L226 Difference]: Without dead ends: 1894 [2021-06-12 22:13:20,270 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2287.3ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:13:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-06-12 22:13:20,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1422. [2021-06-12 22:13:20,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 3.3237156931738214) internal successors, (4723), 1421 states have internal predecessors, (4723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 4723 transitions. [2021-06-12 22:13:20,287 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 4723 transitions. Word has length 26 [2021-06-12 22:13:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:20,287 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 4723 transitions. [2021-06-12 22:13:20,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 4723 transitions. [2021-06-12 22:13:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:20,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:20,289 INFO L472 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] [2021-06-12 22:13:20,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:20,489 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:20,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2104983929, now seen corresponding path program 19 times [2021-06-12 22:13:20,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:20,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310085342] [2021-06-12 22:13:20,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:20,694 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2021-06-12 22:13:20,819 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 42 [2021-06-12 22:13:20,954 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-06-12 22:13:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:21,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:21,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310085342] [2021-06-12 22:13:21,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310085342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:21,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738771080] [2021-06-12 22:13:21,201 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-12 22:13:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:13:21,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:21,546 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 22:13:21,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:21,606 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:21,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:13:21,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:21,737 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 22:13:21,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:21,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:21,751 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-12 22:13:21,752 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:21,875 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:13:21,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:21,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:21,888 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:21,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:13:21,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:22,017 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-12 22:13:22,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:22,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:13:22,032 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:22,145 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-12 22:13:22,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:22,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:13:22,158 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:22,272 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 22:13:22,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:22,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:13:22,285 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:22,396 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-06-12 22:13:22,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:22,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:13:22,409 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:22,516 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 22:13:22,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:22,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:13:22,530 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:22,633 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 22:13:22,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:22,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:13:22,641 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-12 22:13:22,778 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-12 22:13:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:22,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738771080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:22,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:22,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:22,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106820351] [2021-06-12 22:13:22,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:22,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:22,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:22,855 INFO L87 Difference]: Start difference. First operand 1422 states and 4723 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:23,610 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-12 22:13:24,142 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-06-12 22:13:24,614 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-06-12 22:13:25,019 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2021-06-12 22:13:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:25,287 INFO L93 Difference]: Finished difference Result 2073 states and 6674 transitions. [2021-06-12 22:13:25,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:13:25,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:25,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:25,290 INFO L225 Difference]: With dead ends: 2073 [2021-06-12 22:13:25,290 INFO L226 Difference]: Without dead ends: 2058 [2021-06-12 22:13:25,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2937.8ms TimeCoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:13:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2058 states. [2021-06-12 22:13:25,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2058 to 1419. [2021-06-12 22:13:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.3222849083215795) internal successors, (4711), 1418 states have internal predecessors, (4711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4711 transitions. [2021-06-12 22:13:25,309 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4711 transitions. Word has length 26 [2021-06-12 22:13:25,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:25,309 INFO L482 AbstractCegarLoop]: Abstraction has 1419 states and 4711 transitions. [2021-06-12 22:13:25,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:25,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4711 transitions. [2021-06-12 22:13:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:25,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:25,311 INFO L472 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] [2021-06-12 22:13:25,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-12 22:13:25,521 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:25,521 INFO L82 PathProgramCache]: Analyzing trace with hash 178197831, now seen corresponding path program 20 times [2021-06-12 22:13:25,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:25,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312113525] [2021-06-12 22:13:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:25,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312113525] [2021-06-12 22:13:25,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312113525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:25,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485250920] [2021-06-12 22:13:25,887 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 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 [2021-06-12 22:13:25,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:25,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:25,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:13:25,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:26,286 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,286 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 36 treesize of output 22 [2021-06-12 22:13:26,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,306 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:26,307 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 35 [2021-06-12 22:13:26,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,325 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:13:26,325 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 26 treesize of output 23 [2021-06-12 22:13:26,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,335 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,335 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 36 treesize of output 22 [2021-06-12 22:13:26,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,355 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:26,355 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 31 treesize of output 31 [2021-06-12 22:13:26,356 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,365 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,366 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 44 treesize of output 26 [2021-06-12 22:13:26,366 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,375 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,375 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 18 [2021-06-12 22:13:26,376 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,388 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:13:26,388 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 21 treesize of output 16 [2021-06-12 22:13:26,389 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:26,405 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 44 treesize of output 42 [2021-06-12 22:13:26,406 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,415 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,416 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 25 [2021-06-12 22:13:26,416 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,425 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,425 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 31 treesize of output 19 [2021-06-12 22:13:26,426 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,434 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,434 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 21 [2021-06-12 22:13:26,435 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,452 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:13:26,452 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 25 [2021-06-12 22:13:26,453 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,462 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,462 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 23 [2021-06-12 22:13:26,462 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,472 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,472 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 26 treesize of output 1 [2021-06-12 22:13:26,473 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,479 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:26,479 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 1 [2021-06-12 22:13:26,480 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:26,593 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2021-06-12 22:13:26,594 INFO L628 ElimStorePlain]: treesize reduction 63, result has 68.8 percent of original size [2021-06-12 22:13:26,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:13:26,600 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:157 [2021-06-12 22:13:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:26,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485250920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:26,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:26,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:13:26,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504260652] [2021-06-12 22:13:26,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:13:26,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:26,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:13:26,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:13:26,744 INFO L87 Difference]: Start difference. First operand 1419 states and 4711 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:28,188 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-12 22:13:28,318 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-12 22:13:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:28,864 INFO L93 Difference]: Finished difference Result 1996 states and 6371 transitions. [2021-06-12 22:13:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:13:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:28,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:28,867 INFO L225 Difference]: With dead ends: 1996 [2021-06-12 22:13:28,867 INFO L226 Difference]: Without dead ends: 1956 [2021-06-12 22:13:28,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 2251.2ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:13:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2021-06-12 22:13:28,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1468. [2021-06-12 22:13:28,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 3.319700068166326) internal successors, (4870), 1467 states have internal predecessors, (4870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 4870 transitions. [2021-06-12 22:13:28,884 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 4870 transitions. Word has length 26 [2021-06-12 22:13:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:28,885 INFO L482 AbstractCegarLoop]: Abstraction has 1468 states and 4870 transitions. [2021-06-12 22:13:28,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 4870 transitions. [2021-06-12 22:13:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:28,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:28,887 INFO L472 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] [2021-06-12 22:13:29,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1000 [2021-06-12 22:13:29,087 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:29,087 INFO L82 PathProgramCache]: Analyzing trace with hash -2057127289, now seen corresponding path program 21 times [2021-06-12 22:13:29,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:29,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925565411] [2021-06-12 22:13:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:29,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:29,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925565411] [2021-06-12 22:13:29,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925565411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:29,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930649590] [2021-06-12 22:13:29,496 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 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 [2021-06-12 22:13:29,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:29,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:29,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:13:29,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:29,826 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:29,827 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 26 treesize of output 28 [2021-06-12 22:13:29,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,837 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:29,838 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 31 treesize of output 19 [2021-06-12 22:13:29,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,855 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:13:29,855 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 26 treesize of output 24 [2021-06-12 22:13:29,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,876 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:29,876 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 30 [2021-06-12 22:13:29,879 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,888 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:29,888 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 21 [2021-06-12 22:13:29,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,898 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:29,898 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 21 treesize of output 13 [2021-06-12 22:13:29,900 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,919 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:29,919 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 31 treesize of output 31 [2021-06-12 22:13:29,920 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,930 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:29,930 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 36 treesize of output 22 [2021-06-12 22:13:29,930 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,939 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:29,940 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 36 treesize of output 22 [2021-06-12 22:13:29,940 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,959 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:29,959 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 33 [2021-06-12 22:13:29,961 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,980 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:29,981 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 39 treesize of output 35 [2021-06-12 22:13:29,982 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:29,991 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:29,991 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 23 [2021-06-12 22:13:29,992 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:30,001 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:30,001 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 18 [2021-06-12 22:13:30,002 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:30,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:30,016 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 44 treesize of output 42 [2021-06-12 22:13:30,018 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:30,027 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:30,027 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 25 [2021-06-12 22:13:30,027 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:30,033 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:13:30,034 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 44 treesize of output 26 [2021-06-12 22:13:30,034 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:30,250 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-06-12 22:13:30,251 INFO L628 ElimStorePlain]: treesize reduction 156, result has 50.5 percent of original size [2021-06-12 22:13:30,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:13:30,270 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:873, output treesize:221 [2021-06-12 22:13:30,414 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-06-12 22:13:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930649590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:30,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:30,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:13:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793408166] [2021-06-12 22:13:30,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:30,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:30,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:30,596 INFO L87 Difference]: Start difference. First operand 1468 states and 4870 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:31,222 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-06-12 22:13:31,584 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-06-12 22:13:31,791 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-12 22:13:32,271 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2021-06-12 22:13:32,549 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2021-06-12 22:13:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:32,608 INFO L93 Difference]: Finished difference Result 2188 states and 6976 transitions. [2021-06-12 22:13:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:13:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:32,611 INFO L225 Difference]: With dead ends: 2188 [2021-06-12 22:13:32,611 INFO L226 Difference]: Without dead ends: 2163 [2021-06-12 22:13:32,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2322.3ms TimeCoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:13:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-12 22:13:32,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1486. [2021-06-12 22:13:32,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.3252525252525253) internal successors, (4938), 1485 states have internal predecessors, (4938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4938 transitions. [2021-06-12 22:13:32,630 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4938 transitions. Word has length 26 [2021-06-12 22:13:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:32,630 INFO L482 AbstractCegarLoop]: Abstraction has 1486 states and 4938 transitions. [2021-06-12 22:13:32,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4938 transitions. [2021-06-12 22:13:32,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:32,632 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:32,632 INFO L472 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] [2021-06-12 22:13:32,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1040,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:32,833 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:32,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash 309162187, now seen corresponding path program 22 times [2021-06-12 22:13:32,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:32,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014321150] [2021-06-12 22:13:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:33,032 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2021-06-12 22:13:33,169 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-12 22:13:33,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:33,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:33,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014321150] [2021-06-12 22:13:33,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014321150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:33,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410771844] [2021-06-12 22:13:33,460 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 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 [2021-06-12 22:13:33,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:13:33,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:33,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:13:33,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:33,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:33,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:33,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:33,790 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 21 treesize of output 10 [2021-06-12 22:13:33,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:33,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:33,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:33,795 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:13:33,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:33,943 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-06-12 22:13:33,943 INFO L628 ElimStorePlain]: treesize reduction 106, result has 62.4 percent of original size [2021-06-12 22:13:33,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:33,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:33,947 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 26 treesize of output 16 [2021-06-12 22:13:33,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:34,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:34,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:34,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:34,009 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 21 [2021-06-12 22:13:34,010 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:34,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:34,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:34,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:34,070 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 15 [2021-06-12 22:13:34,071 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:34,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:34,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:34,074 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 34 treesize of output 20 [2021-06-12 22:13:34,075 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:34,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:34,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:13:34,122 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:337, output treesize:72 [2021-06-12 22:13:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:34,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410771844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:34,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:34,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:13:34,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855568445] [2021-06-12 22:13:34,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:13:34,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:34,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:13:34,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:13:34,193 INFO L87 Difference]: Start difference. First operand 1486 states and 4938 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:13:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:34,542 INFO L93 Difference]: Finished difference Result 1609 states and 5273 transitions. [2021-06-12 22:13:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:13:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:34,545 INFO L225 Difference]: With dead ends: 1609 [2021-06-12 22:13:34,545 INFO L226 Difference]: Without dead ends: 1594 [2021-06-12 22:13:34,545 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 880.3ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-06-12 22:13:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1492. [2021-06-12 22:13:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1491 states have (on average 3.3272971160295106) internal successors, (4961), 1491 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:34,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 4961 transitions. [2021-06-12 22:13:34,569 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 4961 transitions. Word has length 26 [2021-06-12 22:13:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:34,569 INFO L482 AbstractCegarLoop]: Abstraction has 1492 states and 4961 transitions. [2021-06-12 22:13:34,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:13:34,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 4961 transitions. [2021-06-12 22:13:34,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:34,571 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:34,571 INFO L472 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] [2021-06-12 22:13:34,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:34,771 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:34,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1879987787, now seen corresponding path program 23 times [2021-06-12 22:13:34,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:34,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169235331] [2021-06-12 22:13:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:35,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:35,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:35,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169235331] [2021-06-12 22:13:35,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169235331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:35,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802168314] [2021-06-12 22:13:35,174 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 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 [2021-06-12 22:13:35,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:13:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:35,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-12 22:13:35,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:35,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:35,532 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:35,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:13:35,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:35,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:35,542 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:35,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:13:35,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:35,678 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:13:35,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:35,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:35,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:35,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:13:35,692 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:35,701 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:35,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:13:35,701 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:35,804 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2021-06-12 22:13:35,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:35,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:35,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:35,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:13:35,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:35,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:35,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:35,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:13:35,832 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:35,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:35,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:35,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:35,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:13:35,941 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:35,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:35,950 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:13:35,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-12 22:13:35,950 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:36,104 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2021-06-12 22:13:36,104 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.4 percent of original size [2021-06-12 22:13:36,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:13:36,110 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:377, output treesize:160 [2021-06-12 22:13:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:36,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802168314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:36,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:36,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:36,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088008326] [2021-06-12 22:13:36,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:36,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:36,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:36,282 INFO L87 Difference]: Start difference. First operand 1492 states and 4961 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:37,258 INFO L93 Difference]: Finished difference Result 1996 states and 6490 transitions. [2021-06-12 22:13:37,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:13:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:37,261 INFO L225 Difference]: With dead ends: 1996 [2021-06-12 22:13:37,261 INFO L226 Difference]: Without dead ends: 1971 [2021-06-12 22:13:37,262 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1233.0ms TimeCoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:13:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-06-12 22:13:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1499. [2021-06-12 22:13:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.3317757009345796) internal successors, (4991), 1498 states have internal predecessors, (4991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 4991 transitions. [2021-06-12 22:13:37,280 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 4991 transitions. Word has length 26 [2021-06-12 22:13:37,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:37,280 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 4991 transitions. [2021-06-12 22:13:37,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 4991 transitions. [2021-06-12 22:13:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:37,282 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:37,282 INFO L472 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] [2021-06-12 22:13:37,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:37,482 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:37,482 INFO L82 PathProgramCache]: Analyzing trace with hash -224872725, now seen corresponding path program 24 times [2021-06-12 22:13:37,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:37,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288019540] [2021-06-12 22:13:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:37,819 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2021-06-12 22:13:38,070 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2021-06-12 22:13:38,272 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2021-06-12 22:13:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:38,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:38,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288019540] [2021-06-12 22:13:38,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288019540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:38,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776634292] [2021-06-12 22:13:38,504 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 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 [2021-06-12 22:13:38,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:38,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:38,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:13:38,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:38,967 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:13:39,262 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 96 [2021-06-12 22:13:39,355 INFO L446 ElimStorePlain]: Different costs {2=[A, v_prenex_125], 6=[v_prenex_123, v_prenex_124, v_prenex_126]} [2021-06-12 22:13:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:39,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2021-06-12 22:13:39,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,533 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-06-12 22:13:39,533 INFO L628 ElimStorePlain]: treesize reduction 263, result has 47.9 percent of original size [2021-06-12 22:13:39,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:39,538 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 21 [2021-06-12 22:13:39,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,610 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-12 22:13:39,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 35 [2021-06-12 22:13:39,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,683 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:13:39,683 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-12 22:13:39,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:39,759 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:13:39,759 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 48 [2021-06-12 22:13:39,760 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:39,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:39,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:13:39,806 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 10 variables, input treesize:521, output treesize:74 [2021-06-12 22:13:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:39,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776634292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:39,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:39,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:39,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041793825] [2021-06-12 22:13:39,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:39,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:39,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:39,884 INFO L87 Difference]: Start difference. First operand 1499 states and 4991 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:40,085 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 32 [2021-06-12 22:13:40,686 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-06-12 22:13:41,070 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 22:13:41,467 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 123 [2021-06-12 22:13:41,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:41,587 INFO L93 Difference]: Finished difference Result 1881 states and 6161 transitions. [2021-06-12 22:13:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:13:41,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:41,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:41,590 INFO L225 Difference]: With dead ends: 1881 [2021-06-12 22:13:41,590 INFO L226 Difference]: Without dead ends: 1866 [2021-06-12 22:13:41,590 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2791.3ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:13:41,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-12 22:13:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1508. [2021-06-12 22:13:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1507 states have (on average 3.33178500331785) internal successors, (5021), 1507 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5021 transitions. [2021-06-12 22:13:41,607 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5021 transitions. Word has length 26 [2021-06-12 22:13:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:41,607 INFO L482 AbstractCegarLoop]: Abstraction has 1508 states and 5021 transitions. [2021-06-12 22:13:41,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5021 transitions. [2021-06-12 22:13:41,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:41,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:41,609 INFO L472 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] [2021-06-12 22:13:41,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-12 22:13:41,809 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1842405505, now seen corresponding path program 25 times [2021-06-12 22:13:41,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:41,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280375970] [2021-06-12 22:13:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:42,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:42,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280375970] [2021-06-12 22:13:42,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280375970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082648960] [2021-06-12 22:13:42,359 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 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 [2021-06-12 22:13:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:42,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:13:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:42,789 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 22:13:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:42,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:42,941 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-12 22:13:42,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 102 treesize of output 68 [2021-06-12 22:13:42,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:42,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:42,959 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:13:42,959 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 1 [2021-06-12 22:13:42,959 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:43,389 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 173 [2021-06-12 22:13:43,390 INFO L628 ElimStorePlain]: treesize reduction 703, result has 43.6 percent of original size [2021-06-12 22:13:43,404 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:13:43,404 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-12 22:13:43,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:43,540 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 22:13:43,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:43,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:43,557 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:13:43,557 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 35 [2021-06-12 22:13:43,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:43,817 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 150 [2021-06-12 22:13:43,817 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.4 percent of original size [2021-06-12 22:13:43,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:43,833 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:13:43,833 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 38 [2021-06-12 22:13:43,834 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:43,959 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2021-06-12 22:13:43,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:43,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:43,981 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-12 22:13:43,981 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 63 [2021-06-12 22:13:43,982 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:44,105 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-12 22:13:44,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:44,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:44,124 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-12 22:13:44,124 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-12 22:13:44,125 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:44,240 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 22:13:44,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:44,253 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:13:44,253 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-12 22:13:44,254 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:44,362 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 22:13:44,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:44,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:44,382 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-12 22:13:44,382 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 55 [2021-06-12 22:13:44,384 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:44,487 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 22:13:44,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:44,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:13:44,507 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-12 22:13:44,659 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-12 22:13:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:44,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082648960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:44,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:44,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:44,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434779929] [2021-06-12 22:13:44,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:44,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:44,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:44,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:44,738 INFO L87 Difference]: Start difference. First operand 1508 states and 5021 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:45,395 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2021-06-12 22:13:45,972 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-06-12 22:13:46,557 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 89 [2021-06-12 22:13:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:46,721 INFO L93 Difference]: Finished difference Result 2002 states and 6531 transitions. [2021-06-12 22:13:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:46,721 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:46,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:46,724 INFO L225 Difference]: With dead ends: 2002 [2021-06-12 22:13:46,724 INFO L226 Difference]: Without dead ends: 1983 [2021-06-12 22:13:46,724 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2578.2ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:13:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-06-12 22:13:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1511. [2021-06-12 22:13:46,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1510 states have (on average 3.3350993377483444) internal successors, (5036), 1510 states have internal predecessors, (5036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 5036 transitions. [2021-06-12 22:13:46,742 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 5036 transitions. Word has length 26 [2021-06-12 22:13:46,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:46,742 INFO L482 AbstractCegarLoop]: Abstraction has 1511 states and 5036 transitions. [2021-06-12 22:13:46,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 5036 transitions. [2021-06-12 22:13:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:46,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:46,743 INFO L472 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] [2021-06-12 22:13:46,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-12 22:13:46,957 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:46,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:46,957 INFO L82 PathProgramCache]: Analyzing trace with hash 762618887, now seen corresponding path program 26 times [2021-06-12 22:13:46,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:46,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38228596] [2021-06-12 22:13:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:47,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:47,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:47,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38228596] [2021-06-12 22:13:47,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38228596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:47,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726831215] [2021-06-12 22:13:47,371 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 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 [2021-06-12 22:13:47,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:13:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,625 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:13:47,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:13:47,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:47,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:13:47,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,646 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:13:47,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:47,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:13:47,659 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,670 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:47,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:13:47,672 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,680 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-12 22:13:47,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:47,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:13:47,693 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:13:47,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,713 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 22:13:47,714 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,722 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:13:47,723 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,731 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:13:47,732 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,740 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-12 22:13:47,741 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,749 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:13:47,750 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:13:47,759 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,767 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:13:47,767 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:47,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:13:47,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:13:47,773 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:47,882 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-06-12 22:13:47,882 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-12 22:13:47,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:13:47,884 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-12 22:13:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:48,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726831215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:48,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:48,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:13:48,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655069828] [2021-06-12 22:13:48,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:48,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:48,020 INFO L87 Difference]: Start difference. First operand 1511 states and 5036 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:48,372 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 52 [2021-06-12 22:13:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:49,345 INFO L93 Difference]: Finished difference Result 2063 states and 6723 transitions. [2021-06-12 22:13:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:13:49,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:49,348 INFO L225 Difference]: With dead ends: 2063 [2021-06-12 22:13:49,348 INFO L226 Difference]: Without dead ends: 2038 [2021-06-12 22:13:49,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1541.6ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:13:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-06-12 22:13:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1517. [2021-06-12 22:13:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.3337730870712403) internal successors, (5054), 1516 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5054 transitions. [2021-06-12 22:13:49,366 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5054 transitions. Word has length 26 [2021-06-12 22:13:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:49,366 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 5054 transitions. [2021-06-12 22:13:49,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5054 transitions. [2021-06-12 22:13:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:49,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:49,368 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:49,568 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2136387655, now seen corresponding path program 42 times [2021-06-12 22:13:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80348731] [2021-06-12 22:13:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:49,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:49,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80348731] [2021-06-12 22:13:49,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80348731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:49,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127867407] [2021-06-12 22:13:49,946 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 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 [2021-06-12 22:13:49,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:13:49,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:49,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:13:49,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,531 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 67 treesize of output 35 [2021-06-12 22:13:50,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,540 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 60 treesize of output 32 [2021-06-12 22:13:50,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,549 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 48 treesize of output 26 [2021-06-12 22:13:50,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,557 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 48 treesize of output 21 [2021-06-12 22:13:50,558 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,565 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 41 treesize of output 15 [2021-06-12 22:13:50,566 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,574 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 53 treesize of output 29 [2021-06-12 22:13:50,575 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 21 [2021-06-12 22:13:50,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,592 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 46 treesize of output 26 [2021-06-12 22:13:50,593 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,601 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 65 treesize of output 30 [2021-06-12 22:13:50,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,609 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 51 treesize of output 29 [2021-06-12 22:13:50,610 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,618 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 63 treesize of output 35 [2021-06-12 22:13:50,619 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,627 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 58 treesize of output 32 [2021-06-12 22:13:50,627 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,635 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 77 treesize of output 30 [2021-06-12 22:13:50,636 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,644 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 65 treesize of output 30 [2021-06-12 22:13:50,644 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,651 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 55 treesize of output 29 [2021-06-12 22:13:50,652 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:50,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:50,656 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 46 treesize of output 21 [2021-06-12 22:13:50,657 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:50,699 INFO L628 ElimStorePlain]: treesize reduction 44, result has 49.4 percent of original size [2021-06-12 22:13:50,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:13:50,700 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1121, output treesize:33 [2021-06-12 22:13:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:50,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127867407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:50,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:50,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:13:50,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596722381] [2021-06-12 22:13:50,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:13:50,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:13:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:13:50,739 INFO L87 Difference]: Start difference. First operand 1517 states and 5054 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:52,029 INFO L93 Difference]: Finished difference Result 1955 states and 6355 transitions. [2021-06-12 22:13:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:13:52,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:52,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:52,031 INFO L225 Difference]: With dead ends: 1955 [2021-06-12 22:13:52,031 INFO L226 Difference]: Without dead ends: 1929 [2021-06-12 22:13:52,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1430.8ms TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:13:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-06-12 22:13:52,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1521. [2021-06-12 22:13:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:52,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-12 22:13:52,049 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-12 22:13:52,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:52,049 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-12 22:13:52,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-12 22:13:52,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:52,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:52,051 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:52,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-12 22:13:52,251 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1090705077, now seen corresponding path program 43 times [2021-06-12 22:13:52,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:52,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669009252] [2021-06-12 22:13:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:52,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:52,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669009252] [2021-06-12 22:13:52,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669009252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:52,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460655813] [2021-06-12 22:13:52,632 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 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 [2021-06-12 22:13:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:52,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:13:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:52,940 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-12 22:13:53,001 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_143], 6=[v_prenex_141, v_prenex_145]} [2021-06-12 22:13:53,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:53,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:53,008 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 46 treesize of output 21 [2021-06-12 22:13:53,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:53,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:53,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:53,014 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 39 treesize of output 21 [2021-06-12 22:13:53,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:53,139 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-12 22:13:53,140 INFO L628 ElimStorePlain]: treesize reduction 221, result has 44.2 percent of original size [2021-06-12 22:13:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:53,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-06-12 22:13:53,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:53,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:53,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:53,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:53,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:53,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:53,193 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 56 treesize of output 28 [2021-06-12 22:13:53,194 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:53,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:53,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:53,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:53,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:53,236 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 33 treesize of output 17 [2021-06-12 22:13:53,237 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:53,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:53,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:13:53,271 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:483, output treesize:57 [2021-06-12 22:13:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:53,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460655813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:53,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:53,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:13:53,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470405261] [2021-06-12 22:13:53,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:53,327 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:54,777 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2021-06-12 22:13:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:54,925 INFO L93 Difference]: Finished difference Result 2127 states and 6917 transitions. [2021-06-12 22:13:54,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:13:54,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:54,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:54,928 INFO L225 Difference]: With dead ends: 2127 [2021-06-12 22:13:54,928 INFO L226 Difference]: Without dead ends: 2112 [2021-06-12 22:13:54,929 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1794.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1318, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:13:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-06-12 22:13:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1521. [2021-06-12 22:13:54,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.331578947368421) internal successors, (5064), 1520 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5064 transitions. [2021-06-12 22:13:54,947 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5064 transitions. Word has length 26 [2021-06-12 22:13:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:54,947 INFO L482 AbstractCegarLoop]: Abstraction has 1521 states and 5064 transitions. [2021-06-12 22:13:54,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:54,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5064 transitions. [2021-06-12 22:13:54,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:54,949 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:54,949 INFO L472 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] [2021-06-12 22:13:55,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:13:55,149 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:55,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:55,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1679080501, now seen corresponding path program 27 times [2021-06-12 22:13:55,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:55,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728347488] [2021-06-12 22:13:55,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:55,488 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-06-12 22:13:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:55,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:55,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728347488] [2021-06-12 22:13:55,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728347488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:55,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908663220] [2021-06-12 22:13:55,755 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 [2021-06-12 22:13:55,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:13:55,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:13:55,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:56,258 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 22:13:56,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:56,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:56,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:56,301 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 39 treesize of output 23 [2021-06-12 22:13:56,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:56,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:56,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:56,306 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 34 treesize of output 20 [2021-06-12 22:13:56,307 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:56,433 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-12 22:13:56,433 INFO L628 ElimStorePlain]: treesize reduction 39, result has 81.0 percent of original size [2021-06-12 22:13:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:56,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:56,439 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 25 treesize of output 15 [2021-06-12 22:13:56,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:56,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:56,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-12 22:13:56,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:56,526 INFO L628 ElimStorePlain]: treesize reduction 19, result has 86.2 percent of original size [2021-06-12 22:13:56,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:56,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:56,530 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 26 treesize of output 16 [2021-06-12 22:13:56,532 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:56,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:56,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:56,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:13:56,571 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 21 [2021-06-12 22:13:56,572 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:56,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:56,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:13:56,605 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-12 22:13:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:56,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908663220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:56,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:13:56,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:13:56,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464046307] [2021-06-12 22:13:56,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:13:56,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:13:56,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:13:56,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:13:56,671 INFO L87 Difference]: Start difference. First operand 1521 states and 5064 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:57,151 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-12 22:13:57,905 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2021-06-12 22:13:58,141 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-06-12 22:13:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:13:58,281 INFO L93 Difference]: Finished difference Result 1978 states and 6388 transitions. [2021-06-12 22:13:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:13:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:13:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:13:58,284 INFO L225 Difference]: With dead ends: 1978 [2021-06-12 22:13:58,284 INFO L226 Difference]: Without dead ends: 1963 [2021-06-12 22:13:58,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2100.4ms TimeCoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:13:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2021-06-12 22:13:58,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1529. [2021-06-12 22:13:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-12 22:13:58,302 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-12 22:13:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:13:58,302 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-12 22:13:58,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:13:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-12 22:13:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:13:58,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:13:58,303 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:13:58,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-12 22:13:58,504 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:13:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:13:58,504 INFO L82 PathProgramCache]: Analyzing trace with hash -128698937, now seen corresponding path program 44 times [2021-06-12 22:13:58,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:13:58,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071219952] [2021-06-12 22:13:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:13:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:13:58,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:13:58,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:13:58,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071219952] [2021-06-12 22:13:58,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071219952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:13:58,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078208717] [2021-06-12 22:13:58,845 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 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 [2021-06-12 22:13:58,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:13:58,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:13:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:13:58,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:13:59,235 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-06-12 22:13:59,507 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_170, v_prenex_172, v_prenex_162, v_prenex_164], 5=[A, v_prenex_175, v_prenex_166, v_prenex_168]} [2021-06-12 22:13:59,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:59,537 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:13:59,537 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 30 [2021-06-12 22:13:59,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:13:59,892 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 156 [2021-06-12 22:13:59,893 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-12 22:13:59,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:13:59,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:13:59,915 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 25 treesize of output 31 [2021-06-12 22:13:59,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2021-06-12 22:14:00,288 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 151 [2021-06-12 22:14:00,288 INFO L628 ElimStorePlain]: treesize reduction 7, result has 98.5 percent of original size [2021-06-12 22:14:00,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:00,315 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:14:00,315 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 30 [2021-06-12 22:14:00,316 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:00,495 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-12 22:14:00,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:00,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:00,518 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:14:00,519 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 25 treesize of output 23 [2021-06-12 22:14:00,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:00,712 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-12 22:14:00,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:00,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:00,739 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:14:00,739 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:14:00,741 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:01,099 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2021-06-12 22:14:01,100 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-06-12 22:14:01,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:01,122 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:14:01,122 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 32 [2021-06-12 22:14:01,123 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:01,291 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2021-06-12 22:14:01,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:01,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:01,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:01,310 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 40 [2021-06-12 22:14:01,314 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:01,501 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-12 22:14:01,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:01,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:01,523 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:14:01,523 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:14:01,526 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:01,702 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 22:14:01,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:01,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:14:01,732 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:473, output treesize:269 [2021-06-12 22:14:01,871 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 38 [2021-06-12 22:14:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:01,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078208717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:01,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:01,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:14:01,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674861326] [2021-06-12 22:14:01,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:14:01,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:01,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:14:01,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:14:01,930 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:02,580 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2021-06-12 22:14:02,976 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2021-06-12 22:14:04,015 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 42 [2021-06-12 22:14:04,221 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-06-12 22:14:04,390 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2021-06-12 22:14:04,884 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 64 [2021-06-12 22:14:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:05,259 INFO L93 Difference]: Finished difference Result 2479 states and 7802 transitions. [2021-06-12 22:14:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:14:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:14:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:05,262 INFO L225 Difference]: With dead ends: 2479 [2021-06-12 22:14:05,263 INFO L226 Difference]: Without dead ends: 2435 [2021-06-12 22:14:05,263 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 3344.0ms TimeCoverageRelationStatistics Valid=513, Invalid=2567, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:14:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2021-06-12 22:14:05,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 1529. [2021-06-12 22:14:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.329842931937173) internal successors, (5088), 1528 states have internal predecessors, (5088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 5088 transitions. [2021-06-12 22:14:05,282 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 5088 transitions. Word has length 26 [2021-06-12 22:14:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:05,283 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 5088 transitions. [2021-06-12 22:14:05,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 5088 transitions. [2021-06-12 22:14:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:14:05,284 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:05,284 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:05,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1305,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:05,485 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:05,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:05,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1105017781, now seen corresponding path program 45 times [2021-06-12 22:14:05,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:05,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601679457] [2021-06-12 22:14:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:05,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:05,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601679457] [2021-06-12 22:14:05,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601679457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:05,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376847589] [2021-06-12 22:14:05,850 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 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 [2021-06-12 22:14:05,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:14:05,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:05,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-12 22:14:05,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:06,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,571 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:14:06,571 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 54 [2021-06-12 22:14:06,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:06,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,620 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-12 22:14:06,620 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 67 [2021-06-12 22:14:06,638 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:06,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,681 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:14:06,681 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 60 [2021-06-12 22:14:06,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:06,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,737 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:14:06,738 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 57 [2021-06-12 22:14:06,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:06,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,792 INFO L354 Elim1Store]: treesize reduction 21, result has 53.3 percent of original size [2021-06-12 22:14:06,793 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 52 [2021-06-12 22:14:06,795 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:06,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,837 INFO L354 Elim1Store]: treesize reduction 27, result has 40.0 percent of original size [2021-06-12 22:14:06,837 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 43 [2021-06-12 22:14:06,840 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,890 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-12 22:14:06,890 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-12 22:14:06,898 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:06,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,942 INFO L354 Elim1Store]: treesize reduction 23, result has 48.9 percent of original size [2021-06-12 22:14:06,942 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 50 [2021-06-12 22:14:06,943 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:06,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:06,996 INFO L354 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2021-06-12 22:14:06,996 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 67 [2021-06-12 22:14:07,009 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:07,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:07,070 INFO L354 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2021-06-12 22:14:07,070 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 77 [2021-06-12 22:14:07,100 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:07,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:07,135 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:14:07,135 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 1 [2021-06-12 22:14:07,136 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:07,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:07,159 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:14:07,159 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 37 treesize of output 1 [2021-06-12 22:14:07,160 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:07,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:07,182 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:14:07,182 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-12 22:14:07,182 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:07,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:07,206 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:14:07,206 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 1 [2021-06-12 22:14:07,207 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:07,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:07,228 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:14:07,228 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 1 [2021-06-12 22:14:07,229 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:07,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:07,244 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:14:07,244 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 1 [2021-06-12 22:14:07,245 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:07,807 WARN L205 SmtUtils]: Spent 561.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 92 [2021-06-12 22:14:07,807 INFO L628 ElimStorePlain]: treesize reduction 622, result has 44.9 percent of original size [2021-06-12 22:14:07,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:14:07,835 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1289, output treesize:912 [2021-06-12 22:14:08,309 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2021-06-12 22:14:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:08,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376847589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:08,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:08,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 22:14:08,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403052803] [2021-06-12 22:14:08,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:14:08,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:14:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:14:08,544 INFO L87 Difference]: Start difference. First operand 1529 states and 5088 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:10,095 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 22:14:10,219 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2021-06-12 22:14:10,500 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-06-12 22:14:10,852 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-12 22:14:11,009 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-12 22:14:11,189 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2021-06-12 22:14:11,442 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 22:14:11,668 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-06-12 22:14:12,152 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-06-12 22:14:12,633 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-06-12 22:14:12,902 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 64 [2021-06-12 22:14:13,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:13,044 INFO L93 Difference]: Finished difference Result 2975 states and 9347 transitions. [2021-06-12 22:14:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:14:13,045 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:14:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:13,048 INFO L225 Difference]: With dead ends: 2975 [2021-06-12 22:14:13,048 INFO L226 Difference]: Without dead ends: 2945 [2021-06-12 22:14:13,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 4745.4ms TimeCoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:14:13,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-06-12 22:14:13,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 1537. [2021-06-12 22:14:13,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.3430989583333335) internal successors, (5135), 1536 states have internal predecessors, (5135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5135 transitions. [2021-06-12 22:14:13,070 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5135 transitions. Word has length 26 [2021-06-12 22:14:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:13,070 INFO L482 AbstractCegarLoop]: Abstraction has 1537 states and 5135 transitions. [2021-06-12 22:14:13,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:13,070 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5135 transitions. [2021-06-12 22:14:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:14:13,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:13,072 INFO L472 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] [2021-06-12 22:14:13,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:13,272 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:13,272 INFO L82 PathProgramCache]: Analyzing trace with hash -89210125, now seen corresponding path program 28 times [2021-06-12 22:14:13,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:13,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151782607] [2021-06-12 22:14:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:13,564 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2021-06-12 22:14:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:13,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:13,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151782607] [2021-06-12 22:14:13,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151782607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:13,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62553211] [2021-06-12 22:14:13,781 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 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 [2021-06-12 22:14:13,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:13,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:13,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:14:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:14,119 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-06-12 22:14:14,305 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 60 [2021-06-12 22:14:14,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:14,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:14,384 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 21 [2021-06-12 22:14:14,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:14,519 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-12 22:14:14,519 INFO L628 ElimStorePlain]: treesize reduction 65, result has 72.1 percent of original size [2021-06-12 22:14:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:14,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:14,524 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 34 treesize of output 20 [2021-06-12 22:14:14,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:14,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:14,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:14,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:14,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:14,584 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 25 treesize of output 15 [2021-06-12 22:14:14,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:14,589 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 16 treesize of output 10 [2021-06-12 22:14:14,590 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:14,665 INFO L628 ElimStorePlain]: treesize reduction 19, result has 83.9 percent of original size [2021-06-12 22:14:14,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:14,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:14,669 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 26 treesize of output 16 [2021-06-12 22:14:14,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:14,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:14,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:14:14,704 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:59 [2021-06-12 22:14:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:14,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62553211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:14,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:14,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:14:14,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344204676] [2021-06-12 22:14:14,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:14:14,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:14,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:14:14,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:14:14,771 INFO L87 Difference]: Start difference. First operand 1537 states and 5135 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:15,280 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-06-12 22:14:15,536 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2021-06-12 22:14:15,895 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-06-12 22:14:16,119 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2021-06-12 22:14:16,387 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-06-12 22:14:16,559 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-06-12 22:14:16,826 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2021-06-12 22:14:17,051 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2021-06-12 22:14:17,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:17,172 INFO L93 Difference]: Finished difference Result 2083 states and 6714 transitions. [2021-06-12 22:14:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:14:17,173 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:14:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:17,175 INFO L225 Difference]: With dead ends: 2083 [2021-06-12 22:14:17,175 INFO L226 Difference]: Without dead ends: 2068 [2021-06-12 22:14:17,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2843.3ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:14:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-06-12 22:14:17,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1540. [2021-06-12 22:14:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 3.3443794671864846) internal successors, (5147), 1539 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 5147 transitions. [2021-06-12 22:14:17,194 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 5147 transitions. Word has length 26 [2021-06-12 22:14:17,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:17,194 INFO L482 AbstractCegarLoop]: Abstraction has 1540 states and 5147 transitions. [2021-06-12 22:14:17,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 5147 transitions. [2021-06-12 22:14:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:14:17,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:17,196 INFO L472 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] [2021-06-12 22:14:17,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1508,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:17,396 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:17,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:17,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1706742905, now seen corresponding path program 29 times [2021-06-12 22:14:17,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:17,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109685412] [2021-06-12 22:14:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:17,677 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-12 22:14:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:17,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:17,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109685412] [2021-06-12 22:14:17,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109685412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:17,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508459871] [2021-06-12 22:14:17,897 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 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 [2021-06-12 22:14:17,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:14:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:14:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:18,325 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-06-12 22:14:18,567 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-06-12 22:14:18,644 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:14:18,644 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 46 [2021-06-12 22:14:18,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:18,789 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2021-06-12 22:14:18,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:18,805 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:14:18,805 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 43 [2021-06-12 22:14:18,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:18,946 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2021-06-12 22:14:18,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:18,963 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:14:18,963 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 57 [2021-06-12 22:14:18,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:19,102 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-12 22:14:19,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:19,119 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:14:19,119 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-12 22:14:19,121 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:19,255 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2021-06-12 22:14:19,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:19,271 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:14:19,271 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 50 [2021-06-12 22:14:19,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:19,410 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:14:19,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:19,426 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:14:19,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 65 [2021-06-12 22:14:19,427 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:19,547 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 22:14:19,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:19,560 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:14:19,560 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 53 [2021-06-12 22:14:19,561 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:19,670 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 22:14:19,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:19,684 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:14:19,684 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2021-06-12 22:14:19,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:19,886 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-06-12 22:14:19,886 INFO L628 ElimStorePlain]: treesize reduction 8, result has 96.6 percent of original size [2021-06-12 22:14:19,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:14:19,893 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:687, output treesize:216 [2021-06-12 22:14:20,020 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-12 22:14:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:20,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508459871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:20,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:20,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:14:20,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864793592] [2021-06-12 22:14:20,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:20,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:20,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:20,099 INFO L87 Difference]: Start difference. First operand 1540 states and 5147 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:20,610 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-06-12 22:14:20,880 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2021-06-12 22:14:21,441 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2021-06-12 22:14:22,153 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 97 [2021-06-12 22:14:22,616 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 124 [2021-06-12 22:14:23,115 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 111 [2021-06-12 22:14:23,672 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 128 [2021-06-12 22:14:24,287 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 123 [2021-06-12 22:14:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:24,760 INFO L93 Difference]: Finished difference Result 2320 states and 7403 transitions. [2021-06-12 22:14:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:14:24,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:14:24,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:24,764 INFO L225 Difference]: With dead ends: 2320 [2021-06-12 22:14:24,764 INFO L226 Difference]: Without dead ends: 2301 [2021-06-12 22:14:24,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 4889.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1306, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:14:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-06-12 22:14:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1535. [2021-06-12 22:14:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3428943937418514) internal successors, (5128), 1534 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5128 transitions. [2021-06-12 22:14:24,784 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5128 transitions. Word has length 26 [2021-06-12 22:14:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:24,784 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5128 transitions. [2021-06-12 22:14:24,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5128 transitions. [2021-06-12 22:14:24,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:14:24,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:24,786 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:24,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1517,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:24,986 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash 97294587, now seen corresponding path program 46 times [2021-06-12 22:14:24,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:24,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782162111] [2021-06-12 22:14:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:25,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:25,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782162111] [2021-06-12 22:14:25,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782162111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:25,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640870769] [2021-06-12 22:14:25,422 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 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 [2021-06-12 22:14:25,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:14:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:14:25,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:26,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,025 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 55 treesize of output 24 [2021-06-12 22:14:26,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,034 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 18 [2021-06-12 22:14:26,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,043 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 53 treesize of output 24 [2021-06-12 22:14:26,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,051 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 44 treesize of output 14 [2021-06-12 22:14:26,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,060 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 40 treesize of output 20 [2021-06-12 22:14:26,061 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,069 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 45 treesize of output 23 [2021-06-12 22:14:26,070 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,078 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 18 [2021-06-12 22:14:26,079 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,087 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 56 treesize of output 28 [2021-06-12 22:14:26,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,095 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 51 treesize of output 25 [2021-06-12 22:14:26,096 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,103 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 47 treesize of output 25 [2021-06-12 22:14:26,104 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,111 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 52 treesize of output 28 [2021-06-12 22:14:26,112 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,119 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 23 [2021-06-12 22:14:26,120 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,127 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 44 treesize of output 18 [2021-06-12 22:14:26,128 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,135 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 34 treesize of output 12 [2021-06-12 22:14:26,136 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,143 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 38 treesize of output 20 [2021-06-12 22:14:26,143 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:26,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:14:26,146 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 64 treesize of output 24 [2021-06-12 22:14:26,147 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:26,186 INFO L628 ElimStorePlain]: treesize reduction 40, result has 49.4 percent of original size [2021-06-12 22:14:26,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:14:26,187 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:27 [2021-06-12 22:14:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:26,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640870769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:26,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:26,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-06-12 22:14:26,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346815489] [2021-06-12 22:14:26,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:14:26,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:26,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:14:26,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:14:26,226 INFO L87 Difference]: Start difference. First operand 1535 states and 5128 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:28,294 INFO L93 Difference]: Finished difference Result 3148 states and 9991 transitions. [2021-06-12 22:14:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 22:14:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:14:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:28,298 INFO L225 Difference]: With dead ends: 3148 [2021-06-12 22:14:28,298 INFO L226 Difference]: Without dead ends: 3112 [2021-06-12 22:14:28,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2193.7ms TimeCoverageRelationStatistics Valid=438, Invalid=1914, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:14:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3112 states. [2021-06-12 22:14:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3112 to 1630. [2021-06-12 22:14:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.365254757519951) internal successors, (5482), 1629 states have internal predecessors, (5482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5482 transitions. [2021-06-12 22:14:28,322 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5482 transitions. Word has length 26 [2021-06-12 22:14:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:28,323 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5482 transitions. [2021-06-12 22:14:28,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5482 transitions. [2021-06-12 22:14:28,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:14:28,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:28,324 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:14:28,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1531,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:28,525 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:28,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1930943239, now seen corresponding path program 47 times [2021-06-12 22:14:28,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:28,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203852563] [2021-06-12 22:14:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:28,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:28,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203852563] [2021-06-12 22:14:28,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203852563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:28,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435304321] [2021-06-12 22:14:28,958 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 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 [2021-06-12 22:14:28,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:14:28,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:28,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 22:14:28,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:29,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,583 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:14:29,583 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 52 treesize of output 44 [2021-06-12 22:14:29,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,602 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,602 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 45 treesize of output 1 [2021-06-12 22:14:29,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,618 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,618 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 39 treesize of output 1 [2021-06-12 22:14:29,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,634 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,634 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 38 treesize of output 1 [2021-06-12 22:14:29,634 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,658 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:14:29,658 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 55 treesize of output 39 [2021-06-12 22:14:29,660 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,683 INFO L354 Elim1Store]: treesize reduction 22, result has 24.1 percent of original size [2021-06-12 22:14:29,683 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 44 treesize of output 30 [2021-06-12 22:14:29,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,700 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,700 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 51 treesize of output 1 [2021-06-12 22:14:29,700 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:29,726 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 64 treesize of output 60 [2021-06-12 22:14:29,735 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,750 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,750 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 44 treesize of output 22 [2021-06-12 22:14:29,751 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,765 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,766 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 40 treesize of output 20 [2021-06-12 22:14:29,767 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,783 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,783 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 47 treesize of output 1 [2021-06-12 22:14:29,784 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,800 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,800 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 56 treesize of output 1 [2021-06-12 22:14:29,801 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,816 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,816 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 1 [2021-06-12 22:14:29,816 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,830 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,830 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 18 [2021-06-12 22:14:29,832 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,847 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,847 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 39 treesize of output 1 [2021-06-12 22:14:29,848 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:29,857 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:14:29,857 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 53 treesize of output 1 [2021-06-12 22:14:29,858 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:29,964 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-06-12 22:14:29,965 INFO L628 ElimStorePlain]: treesize reduction 130, result has 42.0 percent of original size [2021-06-12 22:14:29,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:14:29,968 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1065, output treesize:93 [2021-06-12 22:14:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:30,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435304321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:30,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:30,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-12 22:14:30,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72353754] [2021-06-12 22:14:30,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:14:30,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:30,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:14:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:14:30,133 INFO L87 Difference]: Start difference. First operand 1630 states and 5482 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:31,809 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-06-12 22:14:32,212 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-12 22:14:32,471 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-06-12 22:14:32,710 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-06-12 22:14:32,958 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-12 22:14:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:33,088 INFO L93 Difference]: Finished difference Result 3759 states and 11877 transitions. [2021-06-12 22:14:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:14:33,088 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:14:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:33,093 INFO L225 Difference]: With dead ends: 3759 [2021-06-12 22:14:33,093 INFO L226 Difference]: Without dead ends: 3702 [2021-06-12 22:14:33,093 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 2974.3ms TimeCoverageRelationStatistics Valid=575, Invalid=2395, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:14:33,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2021-06-12 22:14:33,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1786. [2021-06-12 22:14:33,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 3.3871148459383753) internal successors, (6046), 1785 states have internal predecessors, (6046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:33,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 6046 transitions. [2021-06-12 22:14:33,122 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 6046 transitions. Word has length 26 [2021-06-12 22:14:33,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:33,122 INFO L482 AbstractCegarLoop]: Abstraction has 1786 states and 6046 transitions. [2021-06-12 22:14:33,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:33,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 6046 transitions. [2021-06-12 22:14:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:14:33,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:33,124 INFO L472 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] [2021-06-12 22:14:33,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1645,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:33,325 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:33,325 INFO L82 PathProgramCache]: Analyzing trace with hash -513521361, now seen corresponding path program 30 times [2021-06-12 22:14:33,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:33,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221544831] [2021-06-12 22:14:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:33,688 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 52 [2021-06-12 22:14:33,879 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-12 22:14:34,063 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2021-06-12 22:14:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:34,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221544831] [2021-06-12 22:14:34,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221544831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:34,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739581520] [2021-06-12 22:14:34,362 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 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 [2021-06-12 22:14:34,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:14:34,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:14:34,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:34,858 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 22:14:35,138 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2021-06-12 22:14:35,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:35,383 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:14:35,383 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 1 [2021-06-12 22:14:35,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:35,427 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-12 22:14:35,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 68 [2021-06-12 22:14:35,429 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:35,941 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 179 [2021-06-12 22:14:35,941 INFO L628 ElimStorePlain]: treesize reduction 697, result has 46.5 percent of original size [2021-06-12 22:14:35,965 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:14:35,965 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-12 22:14:35,967 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:36,136 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-12 22:14:36,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:36,160 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:14:36,160 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 50 [2021-06-12 22:14:36,163 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:36,322 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-12 22:14:36,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:36,354 INFO L354 Elim1Store]: treesize reduction 29, result has 40.8 percent of original size [2021-06-12 22:14:36,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 74 [2021-06-12 22:14:36,357 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:36,520 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2021-06-12 22:14:36,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:36,545 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:14:36,545 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-06-12 22:14:36,549 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:36,708 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2021-06-12 22:14:36,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:36,736 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-12 22:14:36,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 83 treesize of output 67 [2021-06-12 22:14:36,738 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:36,897 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 22:14:36,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:36,917 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:14:36,917 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-06-12 22:14:36,919 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:37,066 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-12 22:14:37,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:37,093 INFO L354 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2021-06-12 22:14:37,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 62 [2021-06-12 22:14:37,096 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:37,241 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-06-12 22:14:37,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:37,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:14:37,256 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1441, output treesize:516 [2021-06-12 22:14:37,483 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-12 22:14:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:37,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739581520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:37,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:37,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:14:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946766670] [2021-06-12 22:14:37,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:14:37,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:37,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:14:37,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:14:37,582 INFO L87 Difference]: Start difference. First operand 1786 states and 6046 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:38,155 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2021-06-12 22:14:38,485 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2021-06-12 22:14:38,927 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-06-12 22:14:39,343 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-06-12 22:14:39,675 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 92 [2021-06-12 22:14:39,931 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:14:40,248 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 91 [2021-06-12 22:14:40,844 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 126 [2021-06-12 22:14:42,110 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 241 DAG size of output: 229 [2021-06-12 22:14:42,724 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 152 [2021-06-12 22:14:43,643 WARN L205 SmtUtils]: Spent 631.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 160 [2021-06-12 22:14:45,255 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 286 DAG size of output: 266 [2021-06-12 22:14:46,590 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 262 DAG size of output: 240 [2021-06-12 22:14:47,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:47,408 INFO L93 Difference]: Finished difference Result 2363 states and 7775 transitions. [2021-06-12 22:14:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:14:47,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:14:47,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:47,411 INFO L225 Difference]: With dead ends: 2363 [2021-06-12 22:14:47,411 INFO L226 Difference]: Without dead ends: 2333 [2021-06-12 22:14:47,411 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 9828.6ms TimeCoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:14:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2333 states. [2021-06-12 22:14:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2333 to 1795. [2021-06-12 22:14:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:47,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-12 22:14:47,432 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-12 22:14:47,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:47,432 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-12 22:14:47,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-12 22:14:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:14:47,434 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:47,434 INFO L472 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] [2021-06-12 22:14:47,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1768 [2021-06-12 22:14:47,635 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2131054141, now seen corresponding path program 31 times [2021-06-12 22:14:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:47,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980436565] [2021-06-12 22:14:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:47,919 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2021-06-12 22:14:48,058 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-12 22:14:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:48,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980436565] [2021-06-12 22:14:48,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980436565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:48,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917740871] [2021-06-12 22:14:48,151 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 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 [2021-06-12 22:14:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:48,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:14:48,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:48,639 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-06-12 22:14:48,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:48,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:48,782 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:14:48,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 64 treesize of output 1 [2021-06-12 22:14:48,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:48,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:48,813 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-12 22:14:48,813 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 60 [2021-06-12 22:14:48,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:49,254 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 177 [2021-06-12 22:14:49,254 INFO L628 ElimStorePlain]: treesize reduction 703, result has 45.7 percent of original size [2021-06-12 22:14:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:49,276 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-06-12 22:14:49,276 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 51 [2021-06-12 22:14:49,277 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:49,416 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2021-06-12 22:14:49,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:49,431 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:14:49,431 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 38 [2021-06-12 22:14:49,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:49,565 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2021-06-12 22:14:49,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:49,583 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:14:49,583 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 42 [2021-06-12 22:14:49,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:49,839 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 138 [2021-06-12 22:14:49,839 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.3 percent of original size [2021-06-12 22:14:49,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:49,861 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-12 22:14:49,861 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-12 22:14:49,863 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:49,981 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-12 22:14:49,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:49,996 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:14:49,996 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 45 [2021-06-12 22:14:49,997 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:50,124 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 22:14:50,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:50,137 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:14:50,137 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 41 [2021-06-12 22:14:50,138 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:50,248 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2021-06-12 22:14:50,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:50,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:50,268 INFO L354 Elim1Store]: treesize reduction 29, result has 29.3 percent of original size [2021-06-12 22:14:50,268 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 63 [2021-06-12 22:14:50,270 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:50,372 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:14:50,372 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:50,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:14:50,379 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 16 variables, input treesize:1437, output treesize:216 [2021-06-12 22:14:50,517 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-06-12 22:14:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:50,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917740871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:50,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:50,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:14:50,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348617479] [2021-06-12 22:14:50,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:14:50,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:50,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:14:50,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:14:50,598 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:50,861 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2021-06-12 22:14:51,252 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2021-06-12 22:14:51,938 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-06-12 22:14:52,276 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:14:52,728 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 134 [2021-06-12 22:14:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:14:53,116 INFO L93 Difference]: Finished difference Result 2510 states and 8287 transitions. [2021-06-12 22:14:53,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:14:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:14:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:14:53,120 INFO L225 Difference]: With dead ends: 2510 [2021-06-12 22:14:53,120 INFO L226 Difference]: Without dead ends: 2491 [2021-06-12 22:14:53,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 3006.4ms TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 22:14:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-12 22:14:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1795. [2021-06-12 22:14:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1795 states, 1794 states have (on average 3.3851727982162765) internal successors, (6073), 1794 states have internal predecessors, (6073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1795 states to 1795 states and 6073 transitions. [2021-06-12 22:14:53,143 INFO L78 Accepts]: Start accepts. Automaton has 1795 states and 6073 transitions. Word has length 26 [2021-06-12 22:14:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:14:53,143 INFO L482 AbstractCegarLoop]: Abstraction has 1795 states and 6073 transitions. [2021-06-12 22:14:53,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1795 states and 6073 transitions. [2021-06-12 22:14:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:14:53,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:14:53,145 INFO L472 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] [2021-06-12 22:14:53,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1811,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:14:53,353 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:14:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:14:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash 473970251, now seen corresponding path program 32 times [2021-06-12 22:14:53,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:14:53,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563924223] [2021-06-12 22:14:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:14:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:14:53,605 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-12 22:14:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:53,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:14:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563924223] [2021-06-12 22:14:53,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563924223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:53,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226859770] [2021-06-12 22:14:53,928 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 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 [2021-06-12 22:14:53,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:14:53,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:14:53,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:14:53,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:14:54,391 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_238], 3=[v_prenex_239, A, v_prenex_237]} [2021-06-12 22:14:54,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:54,410 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 44 treesize of output 42 [2021-06-12 22:14:54,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:54,422 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:14:54,422 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 1 [2021-06-12 22:14:54,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:54,585 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:14:54,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:54,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:54,610 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:14:54,610 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 63 [2021-06-12 22:14:54,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:54,632 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:14:54,632 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 71 [2021-06-12 22:14:54,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:55,072 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2021-06-12 22:14:55,072 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.2 percent of original size [2021-06-12 22:14:55,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:55,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:14:55,091 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 57 [2021-06-12 22:14:55,094 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:55,113 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:14:55,113 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-12 22:14:55,116 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:55,386 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 84 [2021-06-12 22:14:55,386 INFO L628 ElimStorePlain]: treesize reduction 24, result has 93.4 percent of original size [2021-06-12 22:14:55,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:14:55,406 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:14:55,407 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 49 [2021-06-12 22:14:55,408 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:55,426 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:14:55,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 56 [2021-06-12 22:14:55,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:14:55,631 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-06-12 22:14:55,631 INFO L628 ElimStorePlain]: treesize reduction 39, result has 85.0 percent of original size [2021-06-12 22:14:55,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:14:55,641 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:641, output treesize:342 [2021-06-12 22:14:55,815 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-06-12 22:14:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:14:55,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226859770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:14:55,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:14:55,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:14:55,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45248689] [2021-06-12 22:14:55,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:14:55,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:14:55,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:14:55,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:14:55,990 INFO L87 Difference]: Start difference. First operand 1795 states and 6073 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:14:56,203 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 30 [2021-06-12 22:14:56,480 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2021-06-12 22:14:56,921 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-06-12 22:14:57,101 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 64 [2021-06-12 22:14:57,309 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-06-12 22:14:57,437 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2021-06-12 22:14:57,691 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 53 [2021-06-12 22:14:57,844 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-06-12 22:14:58,194 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2021-06-12 22:14:58,463 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-06-12 22:14:58,699 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-06-12 22:14:58,859 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2021-06-12 22:14:59,492 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2021-06-12 22:14:59,807 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2021-06-12 22:15:00,407 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2021-06-12 22:15:01,034 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 85 [2021-06-12 22:15:01,602 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 95 [2021-06-12 22:15:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:02,056 INFO L93 Difference]: Finished difference Result 2613 states and 8461 transitions. [2021-06-12 22:15:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:15:02,056 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:15:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:02,059 INFO L225 Difference]: With dead ends: 2613 [2021-06-12 22:15:02,059 INFO L226 Difference]: Without dead ends: 2544 [2021-06-12 22:15:02,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 6214.0ms TimeCoverageRelationStatistics Valid=344, Invalid=1818, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:15:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2021-06-12 22:15:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 1779. [2021-06-12 22:15:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1778 states have (on average 3.3830146231721034) internal successors, (6015), 1778 states have internal predecessors, (6015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 6015 transitions. [2021-06-12 22:15:02,094 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 6015 transitions. Word has length 26 [2021-06-12 22:15:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:02,094 INFO L482 AbstractCegarLoop]: Abstraction has 1779 states and 6015 transitions. [2021-06-12 22:15:02,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 6015 transitions. [2021-06-12 22:15:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:15:02,097 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:02,097 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:02,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1845,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:02,298 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:02,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:02,298 INFO L82 PathProgramCache]: Analyzing trace with hash -923228447, now seen corresponding path program 48 times [2021-06-12 22:15:02,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:02,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63261390] [2021-06-12 22:15:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:02,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:02,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63261390] [2021-06-12 22:15:02,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63261390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614328246] [2021-06-12 22:15:02,606 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 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 [2021-06-12 22:15:02,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:15:02,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:02,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:15:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:03,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,167 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 62 treesize of output 32 [2021-06-12 22:15:03,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,177 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 50 treesize of output 26 [2021-06-12 22:15:03,178 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,186 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 18 [2021-06-12 22:15:03,187 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,196 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 73 treesize of output 37 [2021-06-12 22:15:03,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,205 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 51 treesize of output 24 [2021-06-12 22:15:03,206 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,215 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 48 treesize of output 26 [2021-06-12 22:15:03,216 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,225 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 59 treesize of output 31 [2021-06-12 22:15:03,226 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,236 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 46 treesize of output 24 [2021-06-12 22:15:03,237 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,248 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 61 treesize of output 31 [2021-06-12 22:15:03,249 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,258 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 58 treesize of output 30 [2021-06-12 22:15:03,260 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,272 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 65 treesize of output 33 [2021-06-12 22:15:03,273 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,282 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 46 treesize of output 24 [2021-06-12 22:15:03,283 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,292 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 54 treesize of output 28 [2021-06-12 22:15:03,293 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,301 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 23 [2021-06-12 22:15:03,303 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,311 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 53 treesize of output 27 [2021-06-12 22:15:03,312 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:03,317 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 44 treesize of output 24 [2021-06-12 22:15:03,318 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:03,392 INFO L628 ElimStorePlain]: treesize reduction 323, result has 11.7 percent of original size [2021-06-12 22:15:03,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:15:03,393 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1045, output treesize:31 [2021-06-12 22:15:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:03,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614328246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:03,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:03,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:15:03,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068023159] [2021-06-12 22:15:03,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:15:03,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:03,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:15:03,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:15:03,427 INFO L87 Difference]: Start difference. First operand 1779 states and 6015 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:04,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:04,856 INFO L93 Difference]: Finished difference Result 2238 states and 7371 transitions. [2021-06-12 22:15:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:15:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:15:04,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:04,859 INFO L225 Difference]: With dead ends: 2238 [2021-06-12 22:15:04,859 INFO L226 Difference]: Without dead ends: 2216 [2021-06-12 22:15:04,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1442.8ms TimeCoverageRelationStatistics Valid=247, Invalid=1013, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 22:15:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-12 22:15:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 1764. [2021-06-12 22:15:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-12 22:15:04,879 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-12 22:15:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:04,879 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-12 22:15:04,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:04,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-12 22:15:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:15:04,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:04,890 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:05,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1873 [2021-06-12 22:15:05,092 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash 2265419, now seen corresponding path program 49 times [2021-06-12 22:15:05,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:05,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578538929] [2021-06-12 22:15:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:05,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:05,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578538929] [2021-06-12 22:15:05,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578538929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:05,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696331284] [2021-06-12 22:15:05,592 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 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 [2021-06-12 22:15:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:05,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:15:05,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:05,989 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_240], 5=[v_prenex_242, v_prenex_244]} [2021-06-12 22:15:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:05,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:05,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:05,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 18 [2021-06-12 22:15:06,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:06,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:06,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:06,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:06,006 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 34 treesize of output 18 [2021-06-12 22:15:06,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:06,130 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-12 22:15:06,131 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-12 22:15:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:06,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:06,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:06,136 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 24 treesize of output 12 [2021-06-12 22:15:06,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:06,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:06,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:06,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:06,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:06,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:06,185 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 28 treesize of output 14 [2021-06-12 22:15:06,186 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:06,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:06,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:06,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:06,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:06,228 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 48 treesize of output 24 [2021-06-12 22:15:06,229 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:06,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:06,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:15:06,264 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-12 22:15:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:06,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696331284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:06,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:06,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:15:06,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877804938] [2021-06-12 22:15:06,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:15:06,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:06,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:15:06,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:15:06,323 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:07,343 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 45 [2021-06-12 22:15:08,135 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-12 22:15:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:09,192 INFO L93 Difference]: Finished difference Result 2440 states and 8027 transitions. [2021-06-12 22:15:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 22:15:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:15:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:09,196 INFO L225 Difference]: With dead ends: 2440 [2021-06-12 22:15:09,196 INFO L226 Difference]: Without dead ends: 2425 [2021-06-12 22:15:09,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 2934.6ms TimeCoverageRelationStatistics Valid=496, Invalid=2054, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:15:09,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-12 22:15:09,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1764. [2021-06-12 22:15:09,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.3851389676687464) internal successors, (5968), 1763 states have internal predecessors, (5968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5968 transitions. [2021-06-12 22:15:09,217 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5968 transitions. Word has length 26 [2021-06-12 22:15:09,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:09,218 INFO L482 AbstractCegarLoop]: Abstraction has 1764 states and 5968 transitions. [2021-06-12 22:15:09,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:09,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5968 transitions. [2021-06-12 22:15:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:15:09,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:09,220 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:09,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1979,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:09,420 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:09,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1175639121, now seen corresponding path program 50 times [2021-06-12 22:15:09,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:09,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702934467] [2021-06-12 22:15:09,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:09,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:09,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702934467] [2021-06-12 22:15:09,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702934467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:09,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648281298] [2021-06-12 22:15:09,877 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 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 [2021-06-12 22:15:09,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:15:09,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:15:09,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:10,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,149 INFO L354 Elim1Store]: treesize reduction 16, result has 40.7 percent of original size [2021-06-12 22:15:10,149 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 53 treesize of output 37 [2021-06-12 22:15:10,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:10,175 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 62 treesize of output 58 [2021-06-12 22:15:10,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,210 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 22:15:10,210 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 51 treesize of output 41 [2021-06-12 22:15:10,213 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,236 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-12 22:15:10,236 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 42 treesize of output 28 [2021-06-12 22:15:10,237 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,264 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 22:15:10,264 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 35 [2021-06-12 22:15:10,266 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,282 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,282 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 45 treesize of output 1 [2021-06-12 22:15:10,282 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,315 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-12 22:15:10,315 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 46 treesize of output 46 [2021-06-12 22:15:10,318 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,332 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,333 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 38 treesize of output 20 [2021-06-12 22:15:10,334 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,349 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,349 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 1 [2021-06-12 22:15:10,349 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,363 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,364 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 18 [2021-06-12 22:15:10,365 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,379 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,379 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 38 treesize of output 20 [2021-06-12 22:15:10,380 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,396 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,396 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 54 treesize of output 1 [2021-06-12 22:15:10,396 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,413 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,413 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 47 treesize of output 1 [2021-06-12 22:15:10,414 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,430 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,430 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 49 treesize of output 1 [2021-06-12 22:15:10,431 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,445 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:15:10,446 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 39 treesize of output 1 [2021-06-12 22:15:10,446 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:10,462 INFO L354 Elim1Store]: treesize reduction 17, result has 37.0 percent of original size [2021-06-12 22:15:10,462 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 54 treesize of output 37 [2021-06-12 22:15:10,463 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:10,527 INFO L628 ElimStorePlain]: treesize reduction 145, result has 27.5 percent of original size [2021-06-12 22:15:10,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:15:10,527 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:55 [2021-06-12 22:15:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:10,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648281298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:10,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:10,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-12 22:15:10,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657407257] [2021-06-12 22:15:10,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:15:10,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:10,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:15:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:15:10,636 INFO L87 Difference]: Start difference. First operand 1764 states and 5968 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:12,131 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2021-06-12 22:15:12,289 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-06-12 22:15:12,420 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2021-06-12 22:15:12,576 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2021-06-12 22:15:13,142 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-06-12 22:15:13,432 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-06-12 22:15:13,669 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-12 22:15:14,368 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2021-06-12 22:15:15,350 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2021-06-12 22:15:15,479 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-06-12 22:15:15,981 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-06-12 22:15:16,410 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-06-12 22:15:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:16,783 INFO L93 Difference]: Finished difference Result 3056 states and 9811 transitions. [2021-06-12 22:15:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:15:16,784 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:15:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:16,787 INFO L225 Difference]: With dead ends: 3056 [2021-06-12 22:15:16,787 INFO L226 Difference]: Without dead ends: 3009 [2021-06-12 22:15:16,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 5736.8ms TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2021-06-12 22:15:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3009 states. [2021-06-12 22:15:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3009 to 1784. [2021-06-12 22:15:16,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1784 states, 1783 states have (on average 3.37633202467751) internal successors, (6020), 1783 states have internal predecessors, (6020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 6020 transitions. [2021-06-12 22:15:16,813 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 6020 transitions. Word has length 26 [2021-06-12 22:15:16,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:16,813 INFO L482 AbstractCegarLoop]: Abstraction has 1784 states and 6020 transitions. [2021-06-12 22:15:16,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 6020 transitions. [2021-06-12 22:15:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:15:16,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:16,815 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:17,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1993 [2021-06-12 22:15:17,015 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:17,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1573091019, now seen corresponding path program 51 times [2021-06-12 22:15:17,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:17,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327335047] [2021-06-12 22:15:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:17,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327335047] [2021-06-12 22:15:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327335047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964709881] [2021-06-12 22:15:17,482 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 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 [2021-06-12 22:15:17,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:15:17,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:15:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:17,904 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-06-12 22:15:18,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:18,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 66 [2021-06-12 22:15:18,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 22:15:18,406 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-12 22:15:18,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2021-06-12 22:15:18,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:19,552 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 201 DAG size of output: 180 [2021-06-12 22:15:19,552 INFO L628 ElimStorePlain]: treesize reduction 96, result has 91.8 percent of original size [2021-06-12 22:15:19,616 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-12 22:15:19,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 55 [2021-06-12 22:15:19,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:19,674 INFO L354 Elim1Store]: treesize reduction 24, result has 51.0 percent of original size [2021-06-12 22:15:19,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 44 [2021-06-12 22:15:19,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:20,789 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 181 DAG size of output: 174 [2021-06-12 22:15:20,790 INFO L628 ElimStorePlain]: treesize reduction 21, result has 98.0 percent of original size [2021-06-12 22:15:20,863 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 22:15:20,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-12 22:15:20,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:20,941 INFO L354 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2021-06-12 22:15:20,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 41 [2021-06-12 22:15:20,943 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:22,174 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 200 DAG size of output: 187 [2021-06-12 22:15:22,175 INFO L628 ElimStorePlain]: treesize reduction 66, result has 94.1 percent of original size [2021-06-12 22:15:22,239 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-12 22:15:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2021-06-12 22:15:22,248 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:22,313 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 22:15:22,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-12 22:15:22,338 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:23,589 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 207 DAG size of output: 184 [2021-06-12 22:15:23,589 INFO L628 ElimStorePlain]: treesize reduction 163, result has 86.3 percent of original size [2021-06-12 22:15:23,658 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 22:15:23,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-06-12 22:15:23,671 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:23,734 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-12 22:15:23,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 52 [2021-06-12 22:15:23,740 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:25,630 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 202 DAG size of output: 192 [2021-06-12 22:15:25,631 INFO L628 ElimStorePlain]: treesize reduction 53, result has 95.1 percent of original size [2021-06-12 22:15:25,696 INFO L354 Elim1Store]: treesize reduction 12, result has 75.5 percent of original size [2021-06-12 22:15:25,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2021-06-12 22:15:25,707 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:25,770 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 22:15:25,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 65 [2021-06-12 22:15:25,808 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:27,594 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 220 DAG size of output: 180 [2021-06-12 22:15:27,595 INFO L628 ElimStorePlain]: treesize reduction 304, result has 75.8 percent of original size [2021-06-12 22:15:27,663 INFO L354 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2021-06-12 22:15:27,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 67 [2021-06-12 22:15:27,688 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:27,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:27,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 80 [2021-06-12 22:15:27,849 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:29,265 WARN L205 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 279 DAG size of output: 208 [2021-06-12 22:15:29,266 INFO L628 ElimStorePlain]: treesize reduction 459, result has 68.3 percent of original size [2021-06-12 22:15:29,330 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-06-12 22:15:29,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2021-06-12 22:15:29,335 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:29,384 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-06-12 22:15:29,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 49 [2021-06-12 22:15:29,402 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:30,603 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 199 DAG size of output: 198 [2021-06-12 22:15:30,604 INFO L628 ElimStorePlain]: treesize reduction 8, result has 99.2 percent of original size [2021-06-12 22:15:30,963 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 261 [2021-06-12 22:15:30,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 14 xjuncts. [2021-06-12 22:15:30,966 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 17 variables, input treesize:1105, output treesize:5253 [2021-06-12 22:15:32,422 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 258 DAG size of output: 107 [2021-06-12 22:15:32,907 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2021-06-12 22:15:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:33,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964709881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:33,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:33,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 22:15:33,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899153762] [2021-06-12 22:15:33,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 22:15:33,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:33,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 22:15:33,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 22:15:33,197 INFO L87 Difference]: Start difference. First operand 1784 states and 6020 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:33,663 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 36 [2021-06-12 22:15:33,950 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-12 22:15:34,234 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-12 22:15:34,987 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 62 [2021-06-12 22:15:35,130 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2021-06-12 22:15:35,884 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 106 [2021-06-12 22:15:36,608 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 72 [2021-06-12 22:15:36,896 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 41 [2021-06-12 22:15:37,522 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 63 [2021-06-12 22:15:37,707 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 37 [2021-06-12 22:15:38,129 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2021-06-12 22:15:38,647 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2021-06-12 22:15:39,075 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-06-12 22:15:39,951 WARN L205 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 109 [2021-06-12 22:15:40,279 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 85 [2021-06-12 22:15:40,904 WARN L205 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2021-06-12 22:15:41,152 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 40 [2021-06-12 22:15:41,406 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 48 [2021-06-12 22:15:41,981 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 75 [2021-06-12 22:15:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:42,044 INFO L93 Difference]: Finished difference Result 2817 states and 9172 transitions. [2021-06-12 22:15:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:15:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:15:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:42,048 INFO L225 Difference]: With dead ends: 2817 [2021-06-12 22:15:42,048 INFO L226 Difference]: Without dead ends: 2787 [2021-06-12 22:15:42,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 10211.4ms TimeCoverageRelationStatistics Valid=559, Invalid=2981, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:15:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-12 22:15:42,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1785. [2021-06-12 22:15:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:42,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-12 22:15:42,078 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-12 22:15:42,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:42,078 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-12 22:15:42,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:42,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-12 22:15:42,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:15:42,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:42,080 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:42,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2022,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:15:42,281 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:42,282 INFO L82 PathProgramCache]: Analyzing trace with hash 238696335, now seen corresponding path program 52 times [2021-06-12 22:15:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:42,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055219253] [2021-06-12 22:15:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:42,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:42,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:42,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055219253] [2021-06-12 22:15:42,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055219253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:42,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394317251] [2021-06-12 22:15:42,748 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 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 [2021-06-12 22:15:42,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:15:42,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:15:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:43,140 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-06-12 22:15:43,354 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_271, v_prenex_269], 6=[A, v_prenex_273]} [2021-06-12 22:15:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,361 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 48 treesize of output 21 [2021-06-12 22:15:43,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,368 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 41 treesize of output 21 [2021-06-12 22:15:43,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,507 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-12 22:15:43,507 INFO L628 ElimStorePlain]: treesize reduction 220, result has 44.2 percent of original size [2021-06-12 22:15:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,512 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 27 treesize of output 15 [2021-06-12 22:15:43,513 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:43,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,566 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 32 treesize of output 18 [2021-06-12 22:15:43,567 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:43,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:43,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:15:43,613 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 56 treesize of output 30 [2021-06-12 22:15:43,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:43,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:43,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:15:43,649 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:485, output treesize:67 [2021-06-12 22:15:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:43,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394317251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:43,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:43,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:15:43,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385329096] [2021-06-12 22:15:43,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:15:43,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:43,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:15:43,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:15:43,704 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:45,053 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2021-06-12 22:15:45,382 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 61 [2021-06-12 22:15:45,624 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2021-06-12 22:15:45,819 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2021-06-12 22:15:46,354 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-06-12 22:15:46,571 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2021-06-12 22:15:46,849 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-12 22:15:46,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:15:46,876 INFO L93 Difference]: Finished difference Result 2300 states and 7575 transitions. [2021-06-12 22:15:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:15:46,876 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:15:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:15:46,879 INFO L225 Difference]: With dead ends: 2300 [2021-06-12 22:15:46,879 INFO L226 Difference]: Without dead ends: 2285 [2021-06-12 22:15:46,880 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 3405.7ms TimeCoverageRelationStatistics Valid=333, Invalid=1473, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:15:46,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-12 22:15:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1783. [2021-06-12 22:15:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 3.377665544332211) internal successors, (6019), 1782 states have internal predecessors, (6019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:46,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 6019 transitions. [2021-06-12 22:15:46,900 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 6019 transitions. Word has length 26 [2021-06-12 22:15:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:15:46,900 INFO L482 AbstractCegarLoop]: Abstraction has 1783 states and 6019 transitions. [2021-06-12 22:15:46,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:15:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 6019 transitions. [2021-06-12 22:15:46,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:15:46,902 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:15:46,903 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:15:47,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2290 [2021-06-12 22:15:47,103 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:15:47,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:15:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash -169937649, now seen corresponding path program 53 times [2021-06-12 22:15:47,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:15:47,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187632724] [2021-06-12 22:15:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:15:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:15:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:47,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:15:47,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187632724] [2021-06-12 22:15:47,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187632724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:47,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265422440] [2021-06-12 22:15:47,448 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 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 [2021-06-12 22:15:47,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:15:47,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:15:47,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:15:47,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:15:47,916 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-06-12 22:15:48,191 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-12 22:15:48,443 INFO L446 ElimStorePlain]: Different costs {5=[A, v_prenex_282, v_prenex_284, v_prenex_285, v_prenex_286, v_prenex_287, v_prenex_288], 6=[v_prenex_283]} [2021-06-12 22:15:48,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:48,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:48,479 INFO L354 Elim1Store]: treesize reduction 18, result has 37.9 percent of original size [2021-06-12 22:15:48,479 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 39 treesize of output 31 [2021-06-12 22:15:48,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:48,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:48,509 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 46 [2021-06-12 22:15:48,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2021-06-12 22:15:49,460 WARN L205 SmtUtils]: Spent 943.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 192 [2021-06-12 22:15:49,461 INFO L628 ElimStorePlain]: treesize reduction 32, result has 97.5 percent of original size [2021-06-12 22:15:49,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:49,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:49,497 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:15:49,497 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 38 treesize of output 36 [2021-06-12 22:15:49,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:49,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:49,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:49,530 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:15:49,530 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 47 treesize of output 41 [2021-06-12 22:15:49,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:50,373 WARN L205 SmtUtils]: Spent 838.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 178 [2021-06-12 22:15:50,382 INFO L628 ElimStorePlain]: treesize reduction 50, result has 95.8 percent of original size [2021-06-12 22:15:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:50,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:50,424 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:15:50,424 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 44 treesize of output 46 [2021-06-12 22:15:50,430 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:50,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:50,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:50,459 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:15:50,460 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 53 treesize of output 41 [2021-06-12 22:15:50,463 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:51,232 WARN L205 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 166 [2021-06-12 22:15:51,232 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.6 percent of original size [2021-06-12 22:15:51,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:51,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:51,265 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:15:51,265 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 51 treesize of output 37 [2021-06-12 22:15:51,267 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:51,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:51,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:51,295 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:15:51,295 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 56 treesize of output 44 [2021-06-12 22:15:51,298 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:51,971 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 154 [2021-06-12 22:15:51,972 INFO L628 ElimStorePlain]: treesize reduction 37, result has 96.2 percent of original size [2021-06-12 22:15:51,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:51,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,004 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-06-12 22:15:52,004 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 39 treesize of output 35 [2021-06-12 22:15:52,014 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:52,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,046 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:15:52,046 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 44 treesize of output 48 [2021-06-12 22:15:52,049 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:52,358 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2021-06-12 22:15:52,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:15:52,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,391 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:15:52,391 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 52 treesize of output 44 [2021-06-12 22:15:52,394 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:52,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,409 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-06-12 22:15:52,409 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 1 [2021-06-12 22:15:52,409 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:52,933 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 131 [2021-06-12 22:15:52,934 INFO L628 ElimStorePlain]: treesize reduction 10, result has 98.7 percent of original size [2021-06-12 22:15:52,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,963 INFO L354 Elim1Store]: treesize reduction 16, result has 44.8 percent of original size [2021-06-12 22:15:52,963 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 40 treesize of output 32 [2021-06-12 22:15:52,965 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:52,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:52,998 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:15:52,998 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 45 treesize of output 39 [2021-06-12 22:15:53,001 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:53,440 WARN L205 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 118 [2021-06-12 22:15:53,440 INFO L628 ElimStorePlain]: treesize reduction 37, result has 94.9 percent of original size [2021-06-12 22:15:53,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:53,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:53,481 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-12 22:15:53,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 104 [2021-06-12 22:15:53,491 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:53,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:15:53,503 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:15:53,503 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 1 [2021-06-12 22:15:53,503 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:15:53,855 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2021-06-12 22:15:53,856 INFO L628 ElimStorePlain]: treesize reduction 68, result has 85.0 percent of original size [2021-06-12 22:15:53,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 10 xjuncts. [2021-06-12 22:15:53,864 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1282, output treesize:291 [2021-06-12 22:15:53,997 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2021-06-12 22:15:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:15:54,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265422440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:15:54,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:15:54,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-12 22:15:54,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894219189] [2021-06-12 22:15:54,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 22:15:54,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:15:54,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 22:15:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-12 22:15:54,049 INFO L87 Difference]: Start difference. First operand 1783 states and 6019 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-06-12 22:15:55,877 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-06-12 22:16:00,916 WARN L205 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 209 DAG size of output: 150 [2021-06-12 22:16:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:01,249 INFO L93 Difference]: Finished difference Result 2524 states and 8353 transitions. [2021-06-12 22:16:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:16:01,250 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 26 [2021-06-12 22:16:01,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:01,253 INFO L225 Difference]: With dead ends: 2524 [2021-06-12 22:16:01,253 INFO L226 Difference]: Without dead ends: 2509 [2021-06-12 22:16:01,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 7381.9ms TimeCoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:16:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-12 22:16:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1785. [2021-06-12 22:16:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.3778026905829597) internal successors, (6026), 1784 states have internal predecessors, (6026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:01,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6026 transitions. [2021-06-12 22:16:01,275 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6026 transitions. Word has length 26 [2021-06-12 22:16:01,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:01,275 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6026 transitions. [2021-06-12 22:16:01,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2021-06-12 22:16:01,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6026 transitions. [2021-06-12 22:16:01,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:01,277 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:01,277 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:01,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2304,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:01,478 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:01,478 INFO L82 PathProgramCache]: Analyzing trace with hash 597949447, now seen corresponding path program 54 times [2021-06-12 22:16:01,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:01,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985979051] [2021-06-12 22:16:01,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:01,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985979051] [2021-06-12 22:16:01,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985979051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071708874] [2021-06-12 22:16:01,849 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 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 [2021-06-12 22:16:01,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:16:01,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 22:16:01,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:02,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,124 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 22:16:02,124 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 35 [2021-06-12 22:16:02,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:02,152 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 62 treesize of output 58 [2021-06-12 22:16:02,160 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,174 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,174 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 18 [2021-06-12 22:16:02,176 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,191 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,191 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 51 treesize of output 1 [2021-06-12 22:16:02,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,207 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,207 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 45 treesize of output 1 [2021-06-12 22:16:02,208 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,224 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,224 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 53 treesize of output 1 [2021-06-12 22:16:02,224 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,240 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,241 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 54 treesize of output 1 [2021-06-12 22:16:02,241 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,256 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,256 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 1 [2021-06-12 22:16:02,257 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,272 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,272 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 39 treesize of output 1 [2021-06-12 22:16:02,273 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,287 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,287 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 42 treesize of output 22 [2021-06-12 22:16:02,288 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,302 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,302 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 38 treesize of output 20 [2021-06-12 22:16:02,303 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,318 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,319 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 46 treesize of output 1 [2021-06-12 22:16:02,319 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,334 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,334 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 49 treesize of output 1 [2021-06-12 22:16:02,335 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,348 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,348 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 38 treesize of output 20 [2021-06-12 22:16:02,349 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,364 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,364 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 47 treesize of output 1 [2021-06-12 22:16:02,365 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:02,373 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:16:02,373 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 54 treesize of output 1 [2021-06-12 22:16:02,374 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,404 INFO L628 ElimStorePlain]: treesize reduction 64, result has 29.7 percent of original size [2021-06-12 22:16:02,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:16:02,405 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:27 [2021-06-12 22:16:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:02,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071708874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:02,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:02,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-06-12 22:16:02,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839306941] [2021-06-12 22:16:02,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:02,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:02,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:02,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:02,469 INFO L87 Difference]: Start difference. First operand 1785 states and 6026 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:03,671 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2021-06-12 22:16:04,042 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 43 [2021-06-12 22:16:04,190 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 46 [2021-06-12 22:16:04,608 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2021-06-12 22:16:04,909 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-06-12 22:16:05,083 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2021-06-12 22:16:05,298 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2021-06-12 22:16:05,572 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-06-12 22:16:06,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:06,102 INFO L93 Difference]: Finished difference Result 2886 states and 9372 transitions. [2021-06-12 22:16:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:16:06,103 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:06,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:06,107 INFO L225 Difference]: With dead ends: 2886 [2021-06-12 22:16:06,107 INFO L226 Difference]: Without dead ends: 2841 [2021-06-12 22:16:06,107 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 3485.9ms TimeCoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:16:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-06-12 22:16:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 1790. [2021-06-12 22:16:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1789 states have (on average 3.377864728898826) internal successors, (6043), 1789 states have internal predecessors, (6043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 6043 transitions. [2021-06-12 22:16:06,130 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 6043 transitions. Word has length 26 [2021-06-12 22:16:06,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:06,130 INFO L482 AbstractCegarLoop]: Abstraction has 1790 states and 6043 transitions. [2021-06-12 22:16:06,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 6043 transitions. [2021-06-12 22:16:06,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:06,132 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:06,132 INFO L472 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] [2021-06-12 22:16:06,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2370 [2021-06-12 22:16:06,333 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1153824785, now seen corresponding path program 33 times [2021-06-12 22:16:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:06,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110754070] [2021-06-12 22:16:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:06,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110754070] [2021-06-12 22:16:06,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110754070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:06,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426601294] [2021-06-12 22:16:06,697 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 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 [2021-06-12 22:16:06,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:16:06,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:06,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:16:06,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:07,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:07,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:07,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:07,292 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 21 [2021-06-12 22:16:07,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:07,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:07,298 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 18 [2021-06-12 22:16:07,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:07,498 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2021-06-12 22:16:07,499 INFO L628 ElimStorePlain]: treesize reduction 136, result has 57.9 percent of original size [2021-06-12 22:16:07,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:07,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:07,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:07,506 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 34 treesize of output 20 [2021-06-12 22:16:07,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:07,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:07,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:07,512 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 21 [2021-06-12 22:16:07,512 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:07,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:07,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:07,583 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 16 treesize of output 10 [2021-06-12 22:16:07,584 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:07,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:07,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:07,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:07,649 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 26 treesize of output 16 [2021-06-12 22:16:07,651 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:07,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:07,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 4 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:16:07,710 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:361, output treesize:72 [2021-06-12 22:16:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:07,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426601294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:07,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:07,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:16:07,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932351342] [2021-06-12 22:16:07,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:07,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:07,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:07,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:07,779 INFO L87 Difference]: Start difference. First operand 1790 states and 6043 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:08,699 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-06-12 22:16:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:08,951 INFO L93 Difference]: Finished difference Result 2197 states and 7293 transitions. [2021-06-12 22:16:08,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:16:08,951 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:08,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:08,954 INFO L225 Difference]: With dead ends: 2197 [2021-06-12 22:16:08,954 INFO L226 Difference]: Without dead ends: 2182 [2021-06-12 22:16:08,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1496.5ms TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:16:08,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2182 states. [2021-06-12 22:16:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2182 to 1782. [2021-06-12 22:16:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:08,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-12 22:16:08,974 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-12 22:16:08,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:08,974 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-12 22:16:08,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:08,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-12 22:16:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:08,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:08,976 INFO L472 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] [2021-06-12 22:16:09,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:09,192 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:09,192 INFO L82 PathProgramCache]: Analyzing trace with hash -824665213, now seen corresponding path program 34 times [2021-06-12 22:16:09,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:09,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962817134] [2021-06-12 22:16:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:09,459 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2021-06-12 22:16:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:09,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:09,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962817134] [2021-06-12 22:16:09,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962817134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:09,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996906834] [2021-06-12 22:16:09,659 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 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 [2021-06-12 22:16:09,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:09,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:09,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,003 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,003 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-12 22:16:10,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,014 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,014 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-12 22:16:10,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,029 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:16:10,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2021-06-12 22:16:10,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,041 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,041 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-12 22:16:10,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,052 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,053 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-12 22:16:10,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,065 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,065 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 1 [2021-06-12 22:16:10,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,077 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,077 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-12 22:16:10,078 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,089 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,089 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-12 22:16:10,090 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,101 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,101 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 1 [2021-06-12 22:16:10,102 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,117 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:16:10,118 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 52 [2021-06-12 22:16:10,119 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,130 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,130 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-12 22:16:10,131 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,145 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:16:10,145 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 60 [2021-06-12 22:16:10,146 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,163 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:16:10,163 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2021-06-12 22:16:10,164 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,176 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,177 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-12 22:16:10,177 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:10,190 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:10,190 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 1 [2021-06-12 22:16:10,191 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,200 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-12 22:16:10,200 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 60 [2021-06-12 22:16:10,202 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:10,277 INFO L628 ElimStorePlain]: treesize reduction 47, result has 63.6 percent of original size [2021-06-12 22:16:10,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:16:10,279 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1445, output treesize:46 [2021-06-12 22:16:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:10,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996906834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:10,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:10,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:16:10,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736613525] [2021-06-12 22:16:10,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:16:10,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:10,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:16:10,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:16:10,324 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:11,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:11,084 INFO L93 Difference]: Finished difference Result 1968 states and 6539 transitions. [2021-06-12 22:16:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:16:11,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:11,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:11,087 INFO L225 Difference]: With dead ends: 1968 [2021-06-12 22:16:11,087 INFO L226 Difference]: Without dead ends: 1953 [2021-06-12 22:16:11,087 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1157.6ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-12 22:16:11,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 1791. [2021-06-12 22:16:11,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.3843575418994414) internal successors, (6058), 1790 states have internal predecessors, (6058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6058 transitions. [2021-06-12 22:16:11,105 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6058 transitions. Word has length 26 [2021-06-12 22:16:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:11,105 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6058 transitions. [2021-06-12 22:16:11,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6058 transitions. [2021-06-12 22:16:11,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:11,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:11,108 INFO L472 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] [2021-06-12 22:16:11,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2416,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:11,308 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:11,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:11,309 INFO L82 PathProgramCache]: Analyzing trace with hash -992474305, now seen corresponding path program 35 times [2021-06-12 22:16:11,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:11,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421255469] [2021-06-12 22:16:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:11,511 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 45 [2021-06-12 22:16:11,624 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2021-06-12 22:16:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:11,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421255469] [2021-06-12 22:16:11,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421255469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036219955] [2021-06-12 22:16:11,849 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 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 [2021-06-12 22:16:11,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:16:11,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:12,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,213 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 26 treesize of output 16 [2021-06-12 22:16:12,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,218 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 18 [2021-06-12 22:16:12,220 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,225 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 44 treesize of output 26 [2021-06-12 22:16:12,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,230 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 26 treesize of output 16 [2021-06-12 22:16:12,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,236 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 [2021-06-12 22:16:12,237 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,242 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 21 [2021-06-12 22:16:12,242 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,248 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 21 [2021-06-12 22:16:12,248 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,254 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 41 treesize of output 22 [2021-06-12 22:16:12,254 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,259 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 31 treesize of output 16 [2021-06-12 22:16:12,260 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,265 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 31 treesize of output 16 [2021-06-12 22:16:12,266 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,271 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 21 treesize of output 10 [2021-06-12 22:16:12,272 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,277 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 18 [2021-06-12 22:16:12,277 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,282 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 [2021-06-12 22:16:12,283 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,288 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 39 treesize of output 23 [2021-06-12 22:16:12,289 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,294 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 39 treesize of output 23 [2021-06-12 22:16:12,294 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:12,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:12,298 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 44 treesize of output 26 [2021-06-12 22:16:12,299 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:12,362 INFO L628 ElimStorePlain]: treesize reduction 71, result has 48.2 percent of original size [2021-06-12 22:16:12,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:16:12,364 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:713, output treesize:48 [2021-06-12 22:16:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:12,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036219955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:12,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:12,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:16:12,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006718722] [2021-06-12 22:16:12,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:12,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:12,415 INFO L87 Difference]: Start difference. First operand 1791 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:16:12,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:12,814 INFO L93 Difference]: Finished difference Result 2115 states and 7050 transitions. [2021-06-12 22:16:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:16:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:12,817 INFO L225 Difference]: With dead ends: 2115 [2021-06-12 22:16:12,817 INFO L226 Difference]: Without dead ends: 2100 [2021-06-12 22:16:12,817 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 881.6ms TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:16:12,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2021-06-12 22:16:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1785. [2021-06-12 22:16:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 3.383968609865471) internal successors, (6037), 1784 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 6037 transitions. [2021-06-12 22:16:12,836 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 6037 transitions. Word has length 26 [2021-06-12 22:16:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:12,836 INFO L482 AbstractCegarLoop]: Abstraction has 1785 states and 6037 transitions. [2021-06-12 22:16:12,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:16:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 6037 transitions. [2021-06-12 22:16:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:12,838 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:12,839 INFO L472 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] [2021-06-12 22:16:13,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2421,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:13,039 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:13,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1234976963, now seen corresponding path program 36 times [2021-06-12 22:16:13,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:13,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242876602] [2021-06-12 22:16:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:13,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:13,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242876602] [2021-06-12 22:16:13,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242876602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:13,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340002176] [2021-06-12 22:16:13,403 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 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 [2021-06-12 22:16:13,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:16:13,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:13,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:13,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:16:13,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,728 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:16:13,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,738 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:16:13,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,747 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:16:13,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,756 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 22:16:13,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,768 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:16:13,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-12 22:16:13,770 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:13,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:16:13,782 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,791 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:16:13,792 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,801 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-12 22:16:13,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:13,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:16:13,814 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,823 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:16:13,825 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:13,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:16:13,837 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,845 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-12 22:16:13,846 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,855 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:16:13,855 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,864 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:16:13,864 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:13,871 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:13,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:16:13,871 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:13,994 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-06-12 22:16:13,994 INFO L628 ElimStorePlain]: treesize reduction 92, result has 50.8 percent of original size [2021-06-12 22:16:13,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:16:13,997 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-12 22:16:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:14,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340002176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:14,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:14,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:16:14,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779802275] [2021-06-12 22:16:14,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:14,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:14,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:14,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:14,141 INFO L87 Difference]: Start difference. First operand 1785 states and 6037 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:14,699 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2021-06-12 22:16:15,169 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2021-06-12 22:16:15,333 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 73 [2021-06-12 22:16:15,651 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-06-12 22:16:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:15,806 INFO L93 Difference]: Finished difference Result 2622 states and 8655 transitions. [2021-06-12 22:16:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:16:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:15,809 INFO L225 Difference]: With dead ends: 2622 [2021-06-12 22:16:15,809 INFO L226 Difference]: Without dead ends: 2607 [2021-06-12 22:16:15,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 1873.1ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:16:15,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-06-12 22:16:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1782. [2021-06-12 22:16:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.381246490735542) internal successors, (6022), 1781 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 6022 transitions. [2021-06-12 22:16:15,832 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 6022 transitions. Word has length 26 [2021-06-12 22:16:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:15,832 INFO L482 AbstractCegarLoop]: Abstraction has 1782 states and 6022 transitions. [2021-06-12 22:16:15,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 6022 transitions. [2021-06-12 22:16:15,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:15,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:15,834 INFO L472 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] [2021-06-12 22:16:16,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2451,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:16,035 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:16,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash 649627467, now seen corresponding path program 37 times [2021-06-12 22:16:16,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:16,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152160037] [2021-06-12 22:16:16,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:16,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152160037] [2021-06-12 22:16:16,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152160037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:16,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548017225] [2021-06-12 22:16:16,367 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 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 [2021-06-12 22:16:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:16,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:16,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:16,694 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-06-12 22:16:16,765 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:16,765 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-06-12 22:16:16,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:16,915 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-12 22:16:16,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:16,933 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:16:16,933 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 49 [2021-06-12 22:16:16,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:17,081 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 22:16:17,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:17,098 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:16:17,098 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 54 [2021-06-12 22:16:17,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:17,237 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-12 22:16:17,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:17,256 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:17,256 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 60 [2021-06-12 22:16:17,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:17,391 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2021-06-12 22:16:17,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:17,409 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:17,409 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 55 [2021-06-12 22:16:17,411 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:17,540 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-06-12 22:16:17,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:17,557 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:17,557 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2021-06-12 22:16:17,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:17,677 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:16:17,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:17,690 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:16:17,690 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 49 [2021-06-12 22:16:17,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:17,814 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 22:16:17,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:17,828 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:17,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 63 [2021-06-12 22:16:17,829 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:17,936 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 22:16:17,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:17,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:16:17,944 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:665, output treesize:244 [2021-06-12 22:16:18,092 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2021-06-12 22:16:18,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:18,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548017225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:18,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:18,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:16:18,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754774005] [2021-06-12 22:16:18,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:18,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:18,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:18,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:18,171 INFO L87 Difference]: Start difference. First operand 1782 states and 6022 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:19,063 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-06-12 22:16:19,407 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-12 22:16:19,835 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2021-06-12 22:16:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:19,984 INFO L93 Difference]: Finished difference Result 2302 states and 7609 transitions. [2021-06-12 22:16:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:16:19,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:19,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:19,987 INFO L225 Difference]: With dead ends: 2302 [2021-06-12 22:16:19,987 INFO L226 Difference]: Without dead ends: 2287 [2021-06-12 22:16:19,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2255.2ms TimeCoverageRelationStatistics Valid=200, Invalid=730, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:16:19,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-06-12 22:16:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1774. [2021-06-12 22:16:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 3.3756345177664975) internal successors, (5985), 1773 states have internal predecessors, (5985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 5985 transitions. [2021-06-12 22:16:20,008 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 5985 transitions. Word has length 26 [2021-06-12 22:16:20,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:20,008 INFO L482 AbstractCegarLoop]: Abstraction has 1774 states and 5985 transitions. [2021-06-12 22:16:20,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:20,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 5985 transitions. [2021-06-12 22:16:20,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:20,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:20,010 INFO L472 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] [2021-06-12 22:16:20,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2486 [2021-06-12 22:16:20,229 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1956490383, now seen corresponding path program 38 times [2021-06-12 22:16:20,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:20,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125304668] [2021-06-12 22:16:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:20,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:20,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125304668] [2021-06-12 22:16:20,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125304668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:20,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979451307] [2021-06-12 22:16:20,571 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 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 [2021-06-12 22:16:20,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:20,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:20,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:20,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,839 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:16:20,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:16:20,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:20,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:16:20,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,860 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:16:20,861 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:20,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:16:20,874 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:20,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:16:20,886 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,895 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-12 22:16:20,895 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:20,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:16:20,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,917 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:16:20,918 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,926 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 22:16:20,927 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,935 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:16:20,936 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,944 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:16:20,946 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,954 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-12 22:16:20,955 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,963 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:16:20,964 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,972 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:16:20,973 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,981 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:16:20,981 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:20,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:20,987 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:16:20,987 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:21,091 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-12 22:16:21,091 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-12 22:16:21,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:16:21,092 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-12 22:16:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:21,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979451307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:21,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:21,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:16:21,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144725653] [2021-06-12 22:16:21,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:16:21,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:21,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:16:21,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:16:21,210 INFO L87 Difference]: Start difference. First operand 1774 states and 5985 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:21,847 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2021-06-12 22:16:22,034 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-12 22:16:22,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:22,298 INFO L93 Difference]: Finished difference Result 2052 states and 6733 transitions. [2021-06-12 22:16:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:16:22,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:22,302 INFO L225 Difference]: With dead ends: 2052 [2021-06-12 22:16:22,302 INFO L226 Difference]: Without dead ends: 2031 [2021-06-12 22:16:22,302 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1297.5ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-06-12 22:16:22,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2021-06-12 22:16:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1745. [2021-06-12 22:16:22,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.371559633027523) internal successors, (5880), 1744 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5880 transitions. [2021-06-12 22:16:22,322 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5880 transitions. Word has length 26 [2021-06-12 22:16:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:22,322 INFO L482 AbstractCegarLoop]: Abstraction has 1745 states and 5880 transitions. [2021-06-12 22:16:22,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:22,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5880 transitions. [2021-06-12 22:16:22,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:22,324 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:22,324 INFO L472 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] [2021-06-12 22:16:22,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2499 [2021-06-12 22:16:22,532 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:22,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1231193713, now seen corresponding path program 39 times [2021-06-12 22:16:22,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:22,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681648046] [2021-06-12 22:16:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:22,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:22,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681648046] [2021-06-12 22:16:22,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681648046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:22,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816499095] [2021-06-12 22:16:22,850 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 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 [2021-06-12 22:16:22,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:16:22,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:22,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:16:22,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:23,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:23,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:23,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 42 [2021-06-12 22:16:23,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:23,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:23,299 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:23,299 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 1 [2021-06-12 22:16:23,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:23,449 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:16:23,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:23,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:23,471 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-06-12 22:16:23,471 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 26 treesize of output 24 [2021-06-12 22:16:23,472 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:23,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:23,488 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 21 treesize of output 29 [2021-06-12 22:16:23,491 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:23,645 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-06-12 22:16:23,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:23,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:23,668 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:16:23,669 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 31 treesize of output 31 [2021-06-12 22:16:23,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:23,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:23,687 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:16:23,687 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 26 treesize of output 23 [2021-06-12 22:16:23,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:23,823 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-06-12 22:16:23,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:23,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:23,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:23,841 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 39 [2021-06-12 22:16:23,843 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:23,858 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:16:23,858 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 25 [2021-06-12 22:16:23,859 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:24,105 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2021-06-12 22:16:24,106 INFO L628 ElimStorePlain]: treesize reduction 3, result has 98.9 percent of original size [2021-06-12 22:16:24,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 4 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-06-12 22:16:24,127 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:401, output treesize:330 [2021-06-12 22:16:24,289 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-12 22:16:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:24,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816499095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:24,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:24,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 22:16:24,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184399290] [2021-06-12 22:16:24,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:16:24,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:24,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:16:24,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:16:24,365 INFO L87 Difference]: Start difference. First operand 1745 states and 5880 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:25,190 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2021-06-12 22:16:25,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:25,405 INFO L93 Difference]: Finished difference Result 1970 states and 6526 transitions. [2021-06-12 22:16:25,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:16:25,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:25,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:25,408 INFO L225 Difference]: With dead ends: 1970 [2021-06-12 22:16:25,408 INFO L226 Difference]: Without dead ends: 1945 [2021-06-12 22:16:25,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1353.1ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:16:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-06-12 22:16:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1724. [2021-06-12 22:16:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.3743470690655832) internal successors, (5814), 1723 states have internal predecessors, (5814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:25,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5814 transitions. [2021-06-12 22:16:25,427 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5814 transitions. Word has length 26 [2021-06-12 22:16:25,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:25,427 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 5814 transitions. [2021-06-12 22:16:25,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:25,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5814 transitions. [2021-06-12 22:16:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:25,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:25,429 INFO L472 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] [2021-06-12 22:16:25,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2511 [2021-06-12 22:16:25,629 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:25,629 INFO L82 PathProgramCache]: Analyzing trace with hash 912205891, now seen corresponding path program 40 times [2021-06-12 22:16:25,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:25,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107005765] [2021-06-12 22:16:25,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:25,910 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-12 22:16:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:26,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107005765] [2021-06-12 22:16:26,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107005765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:26,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460827880] [2021-06-12 22:16:26,021 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 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 [2021-06-12 22:16:26,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:26,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:26,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:26,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:26,444 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-12 22:16:26,519 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:26,519 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 52 [2021-06-12 22:16:26,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:26,673 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2021-06-12 22:16:26,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:26,690 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:16:26,690 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 46 [2021-06-12 22:16:26,691 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:26,838 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2021-06-12 22:16:26,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:26,856 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:26,856 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 50 [2021-06-12 22:16:26,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:26,997 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2021-06-12 22:16:26,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:27,012 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:16:27,012 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 48 [2021-06-12 22:16:27,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:27,161 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2021-06-12 22:16:27,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:27,175 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:16:27,175 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2021-06-12 22:16:27,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:27,302 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-06-12 22:16:27,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:27,318 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:27,319 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-12 22:16:27,320 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:27,438 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:16:27,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:27,453 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:27,453 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 47 [2021-06-12 22:16:27,456 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:27,677 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-06-12 22:16:27,678 INFO L628 ElimStorePlain]: treesize reduction 8, result has 97.5 percent of original size [2021-06-12 22:16:27,692 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:27,692 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 57 [2021-06-12 22:16:27,694 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:27,798 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-06-12 22:16:27,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:27,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:16:27,805 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:641, output treesize:216 [2021-06-12 22:16:27,950 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-06-12 22:16:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:28,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460827880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:28,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:28,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:16:28,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447360292] [2021-06-12 22:16:28,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:28,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:28,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:28,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:28,030 INFO L87 Difference]: Start difference. First operand 1724 states and 5814 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:28,502 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2021-06-12 22:16:28,884 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-12 22:16:29,321 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 132 [2021-06-12 22:16:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:29,476 INFO L93 Difference]: Finished difference Result 2315 states and 7617 transitions. [2021-06-12 22:16:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:16:29,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:29,479 INFO L225 Difference]: With dead ends: 2315 [2021-06-12 22:16:29,479 INFO L226 Difference]: Without dead ends: 2296 [2021-06-12 22:16:29,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1968.9ms TimeCoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-12 22:16:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1717. [2021-06-12 22:16:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.374708624708625) internal successors, (5791), 1716 states have internal predecessors, (5791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 5791 transitions. [2021-06-12 22:16:29,500 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 5791 transitions. Word has length 26 [2021-06-12 22:16:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:29,500 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 5791 transitions. [2021-06-12 22:16:29,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 5791 transitions. [2021-06-12 22:16:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:29,502 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:29,502 INFO L472 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] [2021-06-12 22:16:29,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2563 [2021-06-12 22:16:29,702 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:29,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2073779469, now seen corresponding path program 41 times [2021-06-12 22:16:29,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:29,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165388756] [2021-06-12 22:16:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:30,047 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-12 22:16:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:30,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:30,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165388756] [2021-06-12 22:16:30,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165388756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:30,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503022212] [2021-06-12 22:16:30,197 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 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 [2021-06-12 22:16:30,225 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:16:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:16:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:30,677 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-06-12 22:16:30,955 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2021-06-12 22:16:31,028 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_342, v_prenex_343, v_prenex_344], 3=[A]} [2021-06-12 22:16:31,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:31,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:31,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:31,036 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 34 treesize of output 20 [2021-06-12 22:16:31,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:31,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:31,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:31,042 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 39 treesize of output 23 [2021-06-12 22:16:31,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:31,185 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2021-06-12 22:16:31,185 INFO L628 ElimStorePlain]: treesize reduction 53, result has 81.4 percent of original size [2021-06-12 22:16:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:31,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:31,190 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 21 [2021-06-12 22:16:31,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:31,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:31,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:31,260 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 26 treesize of output 16 [2021-06-12 22:16:31,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:31,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:31,329 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:31,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-06-12 22:16:31,330 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:31,339 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-06-12 22:16:31,339 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 52 [2021-06-12 22:16:31,340 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:31,414 INFO L628 ElimStorePlain]: treesize reduction 19, result has 81.4 percent of original size [2021-06-12 22:16:31,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:16:31,416 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:333, output treesize:59 [2021-06-12 22:16:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:31,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503022212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:31,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:31,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:16:31,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816986649] [2021-06-12 22:16:31,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:31,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:31,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:31,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:31,488 INFO L87 Difference]: Start difference. First operand 1717 states and 5791 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:32,335 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-12 22:16:32,818 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 22:16:33,081 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 84 [2021-06-12 22:16:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:33,222 INFO L93 Difference]: Finished difference Result 2241 states and 7399 transitions. [2021-06-12 22:16:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:16:33,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:33,225 INFO L225 Difference]: With dead ends: 2241 [2021-06-12 22:16:33,225 INFO L226 Difference]: Without dead ends: 2226 [2021-06-12 22:16:33,225 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2375.6ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:16:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-12 22:16:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1703. [2021-06-12 22:16:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 3.375440658049354) internal successors, (5745), 1702 states have internal predecessors, (5745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5745 transitions. [2021-06-12 22:16:33,244 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5745 transitions. Word has length 26 [2021-06-12 22:16:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:33,245 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5745 transitions. [2021-06-12 22:16:33,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5745 transitions. [2021-06-12 22:16:33,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:33,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:33,246 INFO L472 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] [2021-06-12 22:16:33,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2581,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:33,447 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:33,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:33,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1720331193, now seen corresponding path program 42 times [2021-06-12 22:16:33,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:33,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769275733] [2021-06-12 22:16:33,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:33,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:33,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769275733] [2021-06-12 22:16:33,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769275733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:33,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717349298] [2021-06-12 22:16:33,724 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 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 [2021-06-12 22:16:33,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:16:33,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:33,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:33,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:34,163 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:16:34,163 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 30 [2021-06-12 22:16:34,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:34,181 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 44 treesize of output 42 [2021-06-12 22:16:34,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,193 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,193 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 31 treesize of output 1 [2021-06-12 22:16:34,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,204 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,204 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 26 treesize of output 1 [2021-06-12 22:16:34,205 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,215 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 1 [2021-06-12 22:16:34,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,225 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,225 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 23 [2021-06-12 22:16:34,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,234 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,234 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 21 [2021-06-12 22:16:34,235 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,244 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,244 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 36 treesize of output 22 [2021-06-12 22:16:34,245 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,253 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,253 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 36 treesize of output 22 [2021-06-12 22:16:34,254 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,263 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,263 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 25 [2021-06-12 22:16:34,263 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,282 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:16:34,282 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 26 treesize of output 28 [2021-06-12 22:16:34,284 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,293 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,293 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 30 treesize of output 18 [2021-06-12 22:16:34,293 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,302 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,302 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 21 treesize of output 13 [2021-06-12 22:16:34,303 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,312 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,312 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 44 treesize of output 26 [2021-06-12 22:16:34,313 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,330 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:16:34,330 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 35 [2021-06-12 22:16:34,332 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,337 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:16:34,337 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 31 treesize of output 19 [2021-06-12 22:16:34,338 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:34,517 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-06-12 22:16:34,518 INFO L628 ElimStorePlain]: treesize reduction 32, result has 81.3 percent of original size [2021-06-12 22:16:34,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:16:34,524 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:161 [2021-06-12 22:16:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:34,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717349298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:34,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:34,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 22:16:34,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534827632] [2021-06-12 22:16:34,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:16:34,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:34,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:16:34,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:16:34,660 INFO L87 Difference]: Start difference. First operand 1703 states and 5745 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:35,739 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-06-12 22:16:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:36,052 INFO L93 Difference]: Finished difference Result 2062 states and 6748 transitions. [2021-06-12 22:16:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 22:16:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:36,055 INFO L225 Difference]: With dead ends: 2062 [2021-06-12 22:16:36,055 INFO L226 Difference]: Without dead ends: 2032 [2021-06-12 22:16:36,055 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1574.3ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:16:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2021-06-12 22:16:36,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1752. [2021-06-12 22:16:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.371216447744146) internal successors, (5903), 1751 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5903 transitions. [2021-06-12 22:16:36,074 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5903 transitions. Word has length 26 [2021-06-12 22:16:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:36,074 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5903 transitions. [2021-06-12 22:16:36,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5903 transitions. [2021-06-12 22:16:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:36,076 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:36,076 INFO L472 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] [2021-06-12 22:16:36,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2590 [2021-06-12 22:16:36,277 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:36,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:36,277 INFO L82 PathProgramCache]: Analyzing trace with hash 339310983, now seen corresponding path program 43 times [2021-06-12 22:16:36,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:36,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749433592] [2021-06-12 22:16:36,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:36,616 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-06-12 22:16:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:36,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:36,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749433592] [2021-06-12 22:16:36,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749433592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:36,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092230328] [2021-06-12 22:16:36,834 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 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 [2021-06-12 22:16:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:36,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:36,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:37,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,129 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:16:37,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-12 22:16:37,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,138 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 22:16:37,139 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:16:37,149 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:37,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:16:37,162 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,173 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:37,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:16:37,175 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:37,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:16:37,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,197 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:16:37,198 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,207 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:16:37,207 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,216 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:16:37,217 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,226 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:16:37,227 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,237 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:16:37,237 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,246 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:16:37,247 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,256 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:16:37,257 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,266 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2021-06-12 22:16:37,266 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,274 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-12 22:16:37,275 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:37,281 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:37,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-12 22:16:37,281 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:37,399 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-06-12 22:16:37,400 INFO L628 ElimStorePlain]: treesize reduction 60, result has 61.3 percent of original size [2021-06-12 22:16:37,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:16:37,403 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:793, output treesize:88 [2021-06-12 22:16:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:37,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092230328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:37,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:37,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:16:37,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922059298] [2021-06-12 22:16:37,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:37,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:37,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:37,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:37,525 INFO L87 Difference]: Start difference. First operand 1752 states and 5903 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:37,794 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-06-12 22:16:38,419 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-06-12 22:16:38,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:38,598 INFO L93 Difference]: Finished difference Result 2448 states and 8060 transitions. [2021-06-12 22:16:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:16:38,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:38,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:38,602 INFO L225 Difference]: With dead ends: 2448 [2021-06-12 22:16:38,602 INFO L226 Difference]: Without dead ends: 2433 [2021-06-12 22:16:38,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1473.2ms TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:16:38,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-06-12 22:16:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1749. [2021-06-12 22:16:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.372425629290618) internal successors, (5895), 1748 states have internal predecessors, (5895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5895 transitions. [2021-06-12 22:16:38,625 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5895 transitions. Word has length 26 [2021-06-12 22:16:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:38,625 INFO L482 AbstractCegarLoop]: Abstraction has 1749 states and 5895 transitions. [2021-06-12 22:16:38,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5895 transitions. [2021-06-12 22:16:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:38,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:38,627 INFO L472 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] [2021-06-12 22:16:38,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2632 [2021-06-12 22:16:38,827 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:38,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1589366837, now seen corresponding path program 44 times [2021-06-12 22:16:38,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:38,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153201953] [2021-06-12 22:16:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:39,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:39,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:39,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153201953] [2021-06-12 22:16:39,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153201953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:39,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909558310] [2021-06-12 22:16:39,224 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 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 [2021-06-12 22:16:39,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:16:39,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:39,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:16:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:39,597 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:16:39,597 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 53 [2021-06-12 22:16:39,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:39,759 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2021-06-12 22:16:39,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:39,786 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:16:39,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2021-06-12 22:16:39,791 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:40,110 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 159 [2021-06-12 22:16:40,110 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-12 22:16:40,134 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:16:40,134 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-12 22:16:40,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:40,296 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2021-06-12 22:16:40,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:40,319 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:16:40,319 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 59 [2021-06-12 22:16:40,320 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:40,475 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2021-06-12 22:16:40,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:40,496 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:16:40,496 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-12 22:16:40,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:40,650 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2021-06-12 22:16:40,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:40,668 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:16:40,668 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 49 [2021-06-12 22:16:40,669 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:40,813 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2021-06-12 22:16:40,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:40,830 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:16:40,830 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 39 [2021-06-12 22:16:40,831 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:40,970 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-06-12 22:16:40,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:40,989 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:16:40,989 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 43 [2021-06-12 22:16:40,992 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:41,126 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 22:16:41,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:41,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:16:41,152 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:625, output treesize:405 [2021-06-12 22:16:41,340 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-06-12 22:16:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:41,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909558310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:41,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:41,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:16:41,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549968627] [2021-06-12 22:16:41,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:16:41,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:41,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:16:41,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:16:41,412 INFO L87 Difference]: Start difference. First operand 1749 states and 5895 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:41,767 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2021-06-12 22:16:41,946 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 53 [2021-06-12 22:16:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:42,274 INFO L93 Difference]: Finished difference Result 2259 states and 7490 transitions. [2021-06-12 22:16:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:16:42,274 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:42,277 INFO L225 Difference]: With dead ends: 2259 [2021-06-12 22:16:42,277 INFO L226 Difference]: Without dead ends: 2244 [2021-06-12 22:16:42,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 1406.1ms TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:16:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-12 22:16:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1752. [2021-06-12 22:16:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.3757852655625356) internal successors, (5911), 1751 states have internal predecessors, (5911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5911 transitions. [2021-06-12 22:16:42,303 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5911 transitions. Word has length 26 [2021-06-12 22:16:42,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:42,303 INFO L482 AbstractCegarLoop]: Abstraction has 1752 states and 5911 transitions. [2021-06-12 22:16:42,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:42,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5911 transitions. [2021-06-12 22:16:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:42,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:42,305 INFO L472 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] [2021-06-12 22:16:42,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2665,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:42,506 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:42,506 INFO L82 PathProgramCache]: Analyzing trace with hash 755189195, now seen corresponding path program 45 times [2021-06-12 22:16:42,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:42,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989382869] [2021-06-12 22:16:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:42,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:42,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:42,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989382869] [2021-06-12 22:16:42,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989382869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:42,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275510066] [2021-06-12 22:16:42,830 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 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 [2021-06-12 22:16:42,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:16:42,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:42,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:16:42,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:43,349 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:16:43,350 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-12 22:16:43,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:43,776 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 184 [2021-06-12 22:16:43,776 INFO L628 ElimStorePlain]: treesize reduction 60, result has 91.1 percent of original size [2021-06-12 22:16:43,800 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:16:43,800 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 44 [2021-06-12 22:16:43,802 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:44,009 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2021-06-12 22:16:44,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:44,033 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:16:44,033 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-12 22:16:44,034 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:44,237 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2021-06-12 22:16:44,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:44,262 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:16:44,262 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 55 [2021-06-12 22:16:44,267 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:44,703 WARN L205 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 161 [2021-06-12 22:16:44,704 INFO L628 ElimStorePlain]: treesize reduction 13, result has 97.7 percent of original size [2021-06-12 22:16:44,729 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:16:44,730 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-06-12 22:16:44,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:45,113 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2021-06-12 22:16:45,114 INFO L628 ElimStorePlain]: treesize reduction 8, result has 98.5 percent of original size [2021-06-12 22:16:45,137 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:16:45,137 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 51 [2021-06-12 22:16:45,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:45,500 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 135 [2021-06-12 22:16:45,501 INFO L628 ElimStorePlain]: treesize reduction 4, result has 99.2 percent of original size [2021-06-12 22:16:45,522 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:16:45,522 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 48 [2021-06-12 22:16:45,526 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:45,696 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:16:45,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:45,714 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:16:45,715 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 47 [2021-06-12 22:16:45,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:45,883 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-12 22:16:45,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:45,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:16:45,910 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 17 variables, input treesize:673, output treesize:432 [2021-06-12 22:16:46,148 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2021-06-12 22:16:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:46,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275510066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:46,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:46,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 22:16:46,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033529899] [2021-06-12 22:16:46,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:16:46,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:46,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:16:46,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:16:46,240 INFO L87 Difference]: Start difference. First operand 1752 states and 5911 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:16:46,712 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-06-12 22:16:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:47,198 INFO L93 Difference]: Finished difference Result 2323 states and 7689 transitions. [2021-06-12 22:16:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 22:16:47,198 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:47,201 INFO L225 Difference]: With dead ends: 2323 [2021-06-12 22:16:47,201 INFO L226 Difference]: Without dead ends: 2308 [2021-06-12 22:16:47,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1445.4ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-06-12 22:16:47,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1770. [2021-06-12 22:16:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 3.3719615602035047) internal successors, (5965), 1769 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:47,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 5965 transitions. [2021-06-12 22:16:47,222 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 5965 transitions. Word has length 26 [2021-06-12 22:16:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:47,222 INFO L482 AbstractCegarLoop]: Abstraction has 1770 states and 5965 transitions. [2021-06-12 22:16:47,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:16:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 5965 transitions. [2021-06-12 22:16:47,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:47,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:47,224 INFO L472 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] [2021-06-12 22:16:47,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2695 [2021-06-12 22:16:47,425 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1554530479, now seen corresponding path program 46 times [2021-06-12 22:16:47,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:47,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700995536] [2021-06-12 22:16:47,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:47,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:47,750 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-06-12 22:16:47,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:47,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:47,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700995536] [2021-06-12 22:16:47,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700995536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:47,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834815162] [2021-06-12 22:16:47,890 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 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 [2021-06-12 22:16:47,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:16:47,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:47,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:47,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:48,353 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-06-12 22:16:48,560 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 65 [2021-06-12 22:16:48,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:48,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:48,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:48,635 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 18 [2021-06-12 22:16:48,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:48,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:48,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:48,641 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 25 treesize of output 15 [2021-06-12 22:16:48,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:48,744 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-06-12 22:16:48,745 INFO L628 ElimStorePlain]: treesize reduction 73, result has 65.9 percent of original size [2021-06-12 22:16:48,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:48,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:48,749 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 26 treesize of output 16 [2021-06-12 22:16:48,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:48,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:48,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:48,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:48,795 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:16:48,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:48,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:48,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:48,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:48,836 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 34 treesize of output 20 [2021-06-12 22:16:48,837 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:48,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:48,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:16:48,872 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:253, output treesize:61 [2021-06-12 22:16:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:48,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834815162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:48,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:48,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:16:48,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705941723] [2021-06-12 22:16:48,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:48,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:48,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:48,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:48,939 INFO L87 Difference]: Start difference. First operand 1770 states and 5965 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:49,204 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-06-12 22:16:49,770 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 22:16:50,017 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 92 [2021-06-12 22:16:50,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:50,128 INFO L93 Difference]: Finished difference Result 2217 states and 7354 transitions. [2021-06-12 22:16:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:16:50,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:50,132 INFO L225 Difference]: With dead ends: 2217 [2021-06-12 22:16:50,132 INFO L226 Difference]: Without dead ends: 2202 [2021-06-12 22:16:50,132 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1829.6ms TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:16:50,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-06-12 22:16:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1791. [2021-06-12 22:16:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1790 states have (on average 3.368715083798883) internal successors, (6030), 1790 states have internal predecessors, (6030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 6030 transitions. [2021-06-12 22:16:50,152 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 6030 transitions. Word has length 26 [2021-06-12 22:16:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:50,152 INFO L482 AbstractCegarLoop]: Abstraction has 1791 states and 6030 transitions. [2021-06-12 22:16:50,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 6030 transitions. [2021-06-12 22:16:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:50,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:50,154 INFO L472 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] [2021-06-12 22:16:50,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2734,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:50,354 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash -63002301, now seen corresponding path program 47 times [2021-06-12 22:16:50,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:50,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758666934] [2021-06-12 22:16:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:50,620 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-06-12 22:16:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:50,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:50,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758666934] [2021-06-12 22:16:50,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758666934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:50,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994590072] [2021-06-12 22:16:50,727 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 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 [2021-06-12 22:16:50,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:16:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:16:50,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:50,967 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:16:50,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:16:50,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:50,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:50,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:50,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:16:50,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:50,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:50,988 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:50,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:16:50,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:50,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:51,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:16:51,002 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:51,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:16:51,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,023 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-12 22:16:51,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,035 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:51,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:16:51,036 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,045 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:16:51,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,054 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 22:16:51,055 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,063 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:16:51,064 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,072 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:16:51,074 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,082 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-12 22:16:51,083 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:16:51,091 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,100 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:16:51,100 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,108 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:16:51,108 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:51,114 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:16:51,114 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:51,217 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-12 22:16:51,218 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-12 22:16:51,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:16:51,219 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-12 22:16:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:51,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994590072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:51,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:51,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:16:51,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813643837] [2021-06-12 22:16:51,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:16:51,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:16:51,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:16:51,344 INFO L87 Difference]: Start difference. First operand 1791 states and 6030 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:51,711 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-06-12 22:16:52,180 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-06-12 22:16:52,319 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-12 22:16:52,547 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-06-12 22:16:52,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:52,855 INFO L93 Difference]: Finished difference Result 2500 states and 8240 transitions. [2021-06-12 22:16:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:16:52,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:52,858 INFO L225 Difference]: With dead ends: 2500 [2021-06-12 22:16:52,859 INFO L226 Difference]: Without dead ends: 2485 [2021-06-12 22:16:52,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1691.5ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:16:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2021-06-12 22:16:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 1788. [2021-06-12 22:16:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1787 states have (on average 3.369893676552882) internal successors, (6022), 1787 states have internal predecessors, (6022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 6022 transitions. [2021-06-12 22:16:52,889 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 6022 transitions. Word has length 26 [2021-06-12 22:16:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:52,889 INFO L482 AbstractCegarLoop]: Abstraction has 1788 states and 6022 transitions. [2021-06-12 22:16:52,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 6022 transitions. [2021-06-12 22:16:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:52,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:52,891 INFO L472 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] [2021-06-12 22:16:53,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-06-12 22:16:53,093 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:53,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1752945205, now seen corresponding path program 48 times [2021-06-12 22:16:53,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:53,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468163826] [2021-06-12 22:16:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:53,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:53,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468163826] [2021-06-12 22:16:53,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468163826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:53,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593783526] [2021-06-12 22:16:53,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:16:53,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:16:53,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:16:53,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:16:53,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:53,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,750 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 25 [2021-06-12 22:16:53,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,765 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:16:53,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 20 [2021-06-12 22:16:53,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:53,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 34 [2021-06-12 22:16:53,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,793 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-06-12 22:16:53,794 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,805 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-06-12 22:16:53,806 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,818 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-06-12 22:16:53,818 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,831 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 1 [2021-06-12 22:16:53,832 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,846 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:16:53,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2021-06-12 22:16:53,847 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,868 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 1 [2021-06-12 22:16:53,869 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,893 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 1 [2021-06-12 22:16:53,893 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,904 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2021-06-12 22:16:53,905 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,916 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 22:16:53,916 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:53,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2021-06-12 22:16:53,931 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:53,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-06-12 22:16:53,946 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,956 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-06-12 22:16:53,957 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:16:53,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:53,963 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:53,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-06-12 22:16:53,964 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:54,076 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-06-12 22:16:54,077 INFO L628 ElimStorePlain]: treesize reduction 54, result has 61.4 percent of original size [2021-06-12 22:16:54,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:16:54,078 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:833, output treesize:86 [2021-06-12 22:16:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:54,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593783526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:54,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:54,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:16:54,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563453255] [2021-06-12 22:16:54,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:16:54,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:54,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:16:54,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:16:54,211 INFO L87 Difference]: Start difference. First operand 1788 states and 6022 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:54,959 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 57 [2021-06-12 22:16:55,109 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-12 22:16:55,264 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2021-06-12 22:16:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:55,386 INFO L93 Difference]: Finished difference Result 2414 states and 7934 transitions. [2021-06-12 22:16:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:16:55,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:55,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:55,389 INFO L225 Difference]: With dead ends: 2414 [2021-06-12 22:16:55,389 INFO L226 Difference]: Without dead ends: 2368 [2021-06-12 22:16:55,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1399.3ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:16:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2368 states. [2021-06-12 22:16:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2368 to 1811. [2021-06-12 22:16:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-12 22:16:55,409 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-12 22:16:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:55,410 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-12 22:16:55,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-12 22:16:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:55,411 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:55,412 INFO L472 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] [2021-06-12 22:16:55,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2757,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:16:55,612 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:55,612 INFO L82 PathProgramCache]: Analyzing trace with hash 731595527, now seen corresponding path program 49 times [2021-06-12 22:16:55,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:55,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175342541] [2021-06-12 22:16:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:55,941 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2021-06-12 22:16:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:56,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:56,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175342541] [2021-06-12 22:16:56,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175342541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:56,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066524553] [2021-06-12 22:16:56,070 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 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 [2021-06-12 22:16:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:56,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:56,484 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_390, v_prenex_388, v_prenex_389], 3=[A]} [2021-06-12 22:16:56,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:56,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:56,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:16:56,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:56,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:56,511 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:16:56,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:16:56,513 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:56,663 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2021-06-12 22:16:56,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:56,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:56,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:16:56,678 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:56,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:56,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:16:56,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:16:56,688 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:56,805 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 22:16:56,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:56,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:16:56,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:16:56,820 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:56,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:56,830 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:16:56,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-12 22:16:56,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:57,041 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-12 22:16:57,042 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.0 percent of original size [2021-06-12 22:16:57,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:57,059 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-12 22:16:57,059 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 45 [2021-06-12 22:16:57,060 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:57,073 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:16:57,073 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 52 [2021-06-12 22:16:57,075 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:57,246 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-06-12 22:16:57,247 INFO L628 ElimStorePlain]: treesize reduction 32, result has 85.1 percent of original size [2021-06-12 22:16:57,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:16:57,253 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:442, output treesize:160 [2021-06-12 22:16:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:57,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066524553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:57,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:57,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-12 22:16:57,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272414927] [2021-06-12 22:16:57,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:57,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:57,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:57,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:57,429 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:58,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:16:58,036 INFO L93 Difference]: Finished difference Result 2322 states and 7708 transitions. [2021-06-12 22:16:58,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:16:58,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:16:58,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:16:58,040 INFO L225 Difference]: With dead ends: 2322 [2021-06-12 22:16:58,040 INFO L226 Difference]: Without dead ends: 2307 [2021-06-12 22:16:58,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1156.2ms TimeCoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2021-06-12 22:16:58,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2021-06-12 22:16:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 1811. [2021-06-12 22:16:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1810 states have (on average 3.372375690607735) internal successors, (6104), 1810 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 6104 transitions. [2021-06-12 22:16:58,060 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 6104 transitions. Word has length 26 [2021-06-12 22:16:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:16:58,060 INFO L482 AbstractCegarLoop]: Abstraction has 1811 states and 6104 transitions. [2021-06-12 22:16:58,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:16:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 6104 transitions. [2021-06-12 22:16:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:16:58,062 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:16:58,062 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:16:58,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2778 [2021-06-12 22:16:58,263 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:16:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:16:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 396904007, now seen corresponding path program 55 times [2021-06-12 22:16:58,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:16:58,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395171471] [2021-06-12 22:16:58,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:16:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:58,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:16:58,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395171471] [2021-06-12 22:16:58,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395171471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:58,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985343910] [2021-06-12 22:16:58,648 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 [2021-06-12 22:16:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:16:58,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:16:58,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:16:59,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,042 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-12 22:16:59,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,067 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-12 22:16:59,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-12 22:16:59,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,085 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-12 22:16:59,086 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,103 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-12 22:16:59,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,121 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-12 22:16:59,121 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,137 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-12 22:16:59,139 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,156 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-12 22:16:59,156 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,173 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-12 22:16:59,174 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,190 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-12 22:16:59,191 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,207 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-12 22:16:59,207 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,224 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-12 22:16:59,224 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,243 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-12 22:16:59,244 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,267 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-12 22:16:59,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 55 [2021-06-12 22:16:59,269 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,287 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-12 22:16:59,287 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,302 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:16:59,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-12 22:16:59,304 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:16:59,309 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:16:59,309 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 44 [2021-06-12 22:16:59,310 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:16:59,352 INFO L628 ElimStorePlain]: treesize reduction 45, result has 47.7 percent of original size [2021-06-12 22:16:59,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:16:59,353 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-12 22:16:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:16:59,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985343910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:16:59,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:16:59,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:16:59,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900546475] [2021-06-12 22:16:59,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:16:59,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:16:59,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:16:59,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:16:59,387 INFO L87 Difference]: Start difference. First operand 1811 states and 6104 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:00,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:00,056 INFO L93 Difference]: Finished difference Result 2373 states and 7573 transitions. [2021-06-12 22:17:00,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:17:00,056 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:00,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:00,059 INFO L225 Difference]: With dead ends: 2373 [2021-06-12 22:17:00,059 INFO L226 Difference]: Without dead ends: 2336 [2021-06-12 22:17:00,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 903.3ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-12 22:17:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-12 22:17:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1833. [2021-06-12 22:17:00,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.3717248908296944) internal successors, (6177), 1832 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6177 transitions. [2021-06-12 22:17:00,090 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6177 transitions. Word has length 26 [2021-06-12 22:17:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:00,090 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6177 transitions. [2021-06-12 22:17:00,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:00,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6177 transitions. [2021-06-12 22:17:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:00,092 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:00,092 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:00,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2807 [2021-06-12 22:17:00,293 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1464778571, now seen corresponding path program 56 times [2021-06-12 22:17:00,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:00,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854972698] [2021-06-12 22:17:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:00,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:00,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854972698] [2021-06-12 22:17:00,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854972698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:00,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533612994] [2021-06-12 22:17:00,648 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 [2021-06-12 22:17:00,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:00,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:00,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:17:00,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:00,937 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-12 22:17:00,991 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_391, v_prenex_395], 5=[A, v_prenex_393]} [2021-06-12 22:17:00,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:00,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:00,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:00,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:01,000 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 34 treesize of output 18 [2021-06-12 22:17:01,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:01,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:01,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:01,006 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 29 treesize of output 12 [2021-06-12 22:17:01,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:01,134 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-06-12 22:17:01,134 INFO L628 ElimStorePlain]: treesize reduction 199, result has 46.8 percent of original size [2021-06-12 22:17:01,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:01,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:01,139 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 34 treesize of output 18 [2021-06-12 22:17:01,140 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:01,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:01,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:01,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:01,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:01,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:01,199 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 50 treesize of output 24 [2021-06-12 22:17:01,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:01,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:01,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:01,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:01,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:01,243 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 28 treesize of output 14 [2021-06-12 22:17:01,244 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:01,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:01,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:17:01,280 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:445, output treesize:55 [2021-06-12 22:17:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:01,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533612994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:01,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:01,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2021-06-12 22:17:01,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741283453] [2021-06-12 22:17:01,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:17:01,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:17:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:17:01,337 INFO L87 Difference]: Start difference. First operand 1833 states and 6177 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:02,058 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-12 22:17:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:02,178 INFO L93 Difference]: Finished difference Result 2211 states and 7333 transitions. [2021-06-12 22:17:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:17:02,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:02,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:02,182 INFO L225 Difference]: With dead ends: 2211 [2021-06-12 22:17:02,182 INFO L226 Difference]: Without dead ends: 2180 [2021-06-12 22:17:02,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1007.6ms TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:17:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-06-12 22:17:02,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1833. [2021-06-12 22:17:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:02,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-12 22:17:02,202 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-12 22:17:02,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:02,202 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-12 22:17:02,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-12 22:17:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:02,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:02,205 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:02,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2865 [2021-06-12 22:17:02,405 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:02,405 INFO L82 PathProgramCache]: Analyzing trace with hash -192487861, now seen corresponding path program 57 times [2021-06-12 22:17:02,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:02,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435468070] [2021-06-12 22:17:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:02,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435468070] [2021-06-12 22:17:02,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435468070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:02,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341607522] [2021-06-12 22:17:02,766 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 [2021-06-12 22:17:02,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:17:02,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:02,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:17:02,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:03,218 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 22:17:03,499 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_408, v_prenex_409], 6=[v_prenex_404, v_prenex_405, A, v_prenex_407, v_prenex_411, v_prenex_413]} [2021-06-12 22:17:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:03,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:03,541 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:17:03,541 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 39 [2021-06-12 22:17:03,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:03,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:03,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:03,577 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-06-12 22:17:03,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2021-06-12 22:17:03,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:04,549 WARN L205 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 221 [2021-06-12 22:17:04,550 INFO L628 ElimStorePlain]: treesize reduction 38, result has 97.9 percent of original size [2021-06-12 22:17:04,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:04,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:04,596 INFO L354 Elim1Store]: treesize reduction 4, result has 86.2 percent of original size [2021-06-12 22:17:04,596 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 44 treesize of output 48 [2021-06-12 22:17:04,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:04,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:04,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:04,627 INFO L354 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2021-06-12 22:17:04,627 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 39 treesize of output 28 [2021-06-12 22:17:04,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:05,084 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2021-06-12 22:17:05,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:05,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:05,139 INFO L354 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2021-06-12 22:17:05,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 85 [2021-06-12 22:17:05,147 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:05,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:05,178 INFO L354 Elim1Store]: treesize reduction 34, result has 24.4 percent of original size [2021-06-12 22:17:05,179 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 70 [2021-06-12 22:17:05,180 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:05,602 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2021-06-12 22:17:05,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:05,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:05,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:05,641 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-12 22:17:05,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-12 22:17:05,644 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:05,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:05,658 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:17:05,658 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-12 22:17:05,658 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:06,018 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2021-06-12 22:17:06,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:06,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:06,055 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-12 22:17:06,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 84 [2021-06-12 22:17:06,059 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:06,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:06,081 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 22:17:06,082 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 65 [2021-06-12 22:17:06,083 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:06,710 WARN L205 SmtUtils]: Spent 626.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 154 [2021-06-12 22:17:06,711 INFO L628 ElimStorePlain]: treesize reduction 12, result has 98.9 percent of original size [2021-06-12 22:17:06,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:06,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:06,744 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-06-12 22:17:06,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 71 [2021-06-12 22:17:06,745 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:06,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:06,782 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-06-12 22:17:06,782 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 162 treesize of output 96 [2021-06-12 22:17:06,790 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:07,325 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 133 [2021-06-12 22:17:07,325 INFO L628 ElimStorePlain]: treesize reduction 34, result has 96.0 percent of original size [2021-06-12 22:17:07,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:07,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:07,360 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-12 22:17:07,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 73 [2021-06-12 22:17:07,363 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:07,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:07,375 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:17:07,375 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 1 [2021-06-12 22:17:07,375 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:07,583 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-06-12 22:17:07,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:07,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:07,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:07,617 INFO L354 Elim1Store]: treesize reduction 20, result has 45.9 percent of original size [2021-06-12 22:17:07,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 78 [2021-06-12 22:17:07,622 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:07,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:07,645 INFO L354 Elim1Store]: treesize reduction 28, result has 37.8 percent of original size [2021-06-12 22:17:07,646 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 87 [2021-06-12 22:17:07,650 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:07,963 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 86 [2021-06-12 22:17:07,963 INFO L628 ElimStorePlain]: treesize reduction 66, result has 83.2 percent of original size [2021-06-12 22:17:07,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 11 xjuncts. [2021-06-12 22:17:07,971 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 16 variables, input treesize:1858, output treesize:310 [2021-06-12 22:17:08,127 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2021-06-12 22:17:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:08,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341607522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:08,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:08,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:17:08,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225391299] [2021-06-12 22:17:08,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 22:17:08,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:08,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 22:17:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:17:08,174 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:09,160 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 22:17:09,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:09,281 INFO L93 Difference]: Finished difference Result 2363 states and 7827 transitions. [2021-06-12 22:17:09,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 22:17:09,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:09,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:09,284 INFO L225 Difference]: With dead ends: 2363 [2021-06-12 22:17:09,284 INFO L226 Difference]: Without dead ends: 2348 [2021-06-12 22:17:09,285 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1676.3ms TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:17:09,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-12 22:17:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1833. [2021-06-12 22:17:09,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.368449781659389) internal successors, (6171), 1832 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6171 transitions. [2021-06-12 22:17:09,305 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6171 transitions. Word has length 26 [2021-06-12 22:17:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:09,306 INFO L482 AbstractCegarLoop]: Abstraction has 1833 states and 6171 transitions. [2021-06-12 22:17:09,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:09,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6171 transitions. [2021-06-12 22:17:09,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:09,308 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:09,308 INFO L472 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] [2021-06-12 22:17:09,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2879,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:09,508 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:09,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1845763381, now seen corresponding path program 50 times [2021-06-12 22:17:09,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:09,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091474960] [2021-06-12 22:17:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:09,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:09,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091474960] [2021-06-12 22:17:09,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091474960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:09,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626964787] [2021-06-12 22:17:09,964 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 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 [2021-06-12 22:17:09,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:09,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 22:17:09,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:10,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,241 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:17:10,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:17:10,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:10,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:17:10,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:17:10,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:10,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:17:10,278 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:10,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:17:10,290 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,299 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 26 [2021-06-12 22:17:10,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:17:10,312 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,322 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 1 [2021-06-12 22:17:10,323 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,331 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 18 [2021-06-12 22:17:10,332 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,340 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 22 [2021-06-12 22:17:10,341 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,349 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 13 [2021-06-12 22:17:10,350 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,359 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 23 [2021-06-12 22:17:10,360 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,368 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-06-12 22:17:10,369 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,377 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2021-06-12 22:17:10,378 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,387 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 21 [2021-06-12 22:17:10,388 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:10,393 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-06-12 22:17:10,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-06-12 22:17:10,394 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:10,499 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2021-06-12 22:17:10,499 INFO L628 ElimStorePlain]: treesize reduction 77, result has 51.0 percent of original size [2021-06-12 22:17:10,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:17:10,501 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:713, output treesize:80 [2021-06-12 22:17:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:10,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626964787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:10,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:10,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:17:10,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383179791] [2021-06-12 22:17:10,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:17:10,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:10,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:17:10,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:17:10,622 INFO L87 Difference]: Start difference. First operand 1833 states and 6171 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:11,050 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-06-12 22:17:11,755 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2021-06-12 22:17:12,006 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-12 22:17:12,236 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-06-12 22:17:12,422 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-06-12 22:17:12,709 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-06-12 22:17:13,315 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-12 22:17:13,619 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2021-06-12 22:17:13,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:13,699 INFO L93 Difference]: Finished difference Result 2484 states and 8143 transitions. [2021-06-12 22:17:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:17:13,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:13,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:13,702 INFO L225 Difference]: With dead ends: 2484 [2021-06-12 22:17:13,702 INFO L226 Difference]: Without dead ends: 2469 [2021-06-12 22:17:13,702 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 2891.7ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:17:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2021-06-12 22:17:13,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 1840. [2021-06-12 22:17:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1840 states, 1839 states have (on average 3.368678629690049) internal successors, (6195), 1839 states have internal predecessors, (6195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 6195 transitions. [2021-06-12 22:17:13,725 INFO L78 Accepts]: Start accepts. Automaton has 1840 states and 6195 transitions. Word has length 26 [2021-06-12 22:17:13,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:13,725 INFO L482 AbstractCegarLoop]: Abstraction has 1840 states and 6195 transitions. [2021-06-12 22:17:13,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1840 states and 6195 transitions. [2021-06-12 22:17:13,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:13,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:13,727 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:13,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2942 [2021-06-12 22:17:13,927 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash -295381817, now seen corresponding path program 58 times [2021-06-12 22:17:13,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:13,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941350308] [2021-06-12 22:17:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:14,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:14,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941350308] [2021-06-12 22:17:14,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941350308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:14,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645906040] [2021-06-12 22:17:14,216 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 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 [2021-06-12 22:17:14,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:14,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:17:14,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:14,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,798 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 56 treesize of output 28 [2021-06-12 22:17:14,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,807 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 45 treesize of output 23 [2021-06-12 22:17:14,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,815 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 52 treesize of output 28 [2021-06-12 22:17:14,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,824 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 64 treesize of output 24 [2021-06-12 22:17:14,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,833 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 47 treesize of output 25 [2021-06-12 22:17:14,833 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2021-06-12 22:17:14,842 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,850 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 18 [2021-06-12 22:17:14,850 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,858 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 40 treesize of output 20 [2021-06-12 22:17:14,858 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,866 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 44 treesize of output 14 [2021-06-12 22:17:14,867 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,874 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 38 treesize of output 20 [2021-06-12 22:17:14,875 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,883 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 53 treesize of output 24 [2021-06-12 22:17:14,883 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,890 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 18 [2021-06-12 22:17:14,891 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,898 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 34 treesize of output 12 [2021-06-12 22:17:14,899 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,906 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 55 treesize of output 24 [2021-06-12 22:17:14,907 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,914 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 44 treesize of output 18 [2021-06-12 22:17:14,914 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:14,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:14,918 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 23 [2021-06-12 22:17:14,919 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,942 INFO L628 ElimStorePlain]: treesize reduction 60, result has 24.1 percent of original size [2021-06-12 22:17:14,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:14,943 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:937, output treesize:13 [2021-06-12 22:17:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:14,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645906040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:14,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:14,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 22:17:14,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063912270] [2021-06-12 22:17:14,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:17:14,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:17:14,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:17:14,967 INFO L87 Difference]: Start difference. First operand 1840 states and 6195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:16,523 INFO L93 Difference]: Finished difference Result 2777 states and 8773 transitions. [2021-06-12 22:17:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:17:16,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:16,527 INFO L225 Difference]: With dead ends: 2777 [2021-06-12 22:17:16,527 INFO L226 Difference]: Without dead ends: 2740 [2021-06-12 22:17:16,527 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1554.4ms TimeCoverageRelationStatistics Valid=295, Invalid=1345, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:17:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2740 states. [2021-06-12 22:17:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2740 to 1885. [2021-06-12 22:17:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.379511677282378) internal successors, (6367), 1884 states have internal predecessors, (6367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6367 transitions. [2021-06-12 22:17:16,559 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6367 transitions. Word has length 26 [2021-06-12 22:17:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:16,559 INFO L482 AbstractCegarLoop]: Abstraction has 1885 states and 6367 transitions. [2021-06-12 22:17:16,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6367 transitions. [2021-06-12 22:17:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:16,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:16,562 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:16,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2954,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:16,763 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:16,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:16,763 INFO L82 PathProgramCache]: Analyzing trace with hash -69388293, now seen corresponding path program 59 times [2021-06-12 22:17:16,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:16,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530455452] [2021-06-12 22:17:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:16,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:16,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530455452] [2021-06-12 22:17:16,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530455452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:16,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52559218] [2021-06-12 22:17:16,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:17:17,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:17:17,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:17,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:17:17,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:17,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,566 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 58 treesize of output 30 [2021-06-12 22:17:17,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,575 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 44 treesize of output 24 [2021-06-12 22:17:17,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,584 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 18 [2021-06-12 22:17:17,585 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,593 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 73 treesize of output 37 [2021-06-12 22:17:17,594 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,603 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 51 treesize of output 24 [2021-06-12 22:17:17,604 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,612 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 53 treesize of output 27 [2021-06-12 22:17:17,613 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,622 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 46 treesize of output 24 [2021-06-12 22:17:17,622 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,631 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 61 treesize of output 31 [2021-06-12 22:17:17,632 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,640 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 65 treesize of output 33 [2021-06-12 22:17:17,641 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,649 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 23 [2021-06-12 22:17:17,650 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,658 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 50 treesize of output 26 [2021-06-12 22:17:17,659 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,668 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 54 treesize of output 28 [2021-06-12 22:17:17,669 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,677 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 59 treesize of output 31 [2021-06-12 22:17:17,678 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,687 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 62 treesize of output 32 [2021-06-12 22:17:17,688 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,695 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 48 treesize of output 26 [2021-06-12 22:17:17,696 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:17,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:17:17,701 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 46 treesize of output 24 [2021-06-12 22:17:17,702 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:17,779 INFO L628 ElimStorePlain]: treesize reduction 348, result has 11.9 percent of original size [2021-06-12 22:17:17,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:17:17,780 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1077, output treesize:41 [2021-06-12 22:17:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:17,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52559218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:17,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:17,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:17:17,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508717992] [2021-06-12 22:17:17,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:17:17,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:17,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:17:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:17:17,822 INFO L87 Difference]: Start difference. First operand 1885 states and 6367 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-06-12 22:17:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:19,145 INFO L93 Difference]: Finished difference Result 3099 states and 9931 transitions. [2021-06-12 22:17:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:17:19,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:19,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:19,149 INFO L225 Difference]: With dead ends: 3099 [2021-06-12 22:17:19,149 INFO L226 Difference]: Without dead ends: 3069 [2021-06-12 22:17:19,150 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1329.8ms TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:17:19,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2021-06-12 22:17:19,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 1905. [2021-06-12 22:17:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 1904 states have (on average 3.3891806722689077) internal successors, (6453), 1904 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 6453 transitions. [2021-06-12 22:17:19,178 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 6453 transitions. Word has length 26 [2021-06-12 22:17:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:19,178 INFO L482 AbstractCegarLoop]: Abstraction has 1905 states and 6453 transitions. [2021-06-12 22:17:19,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-06-12 22:17:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 6453 transitions. [2021-06-12 22:17:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:19,180 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:19,180 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:19,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3060 [2021-06-12 22:17:19,380 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1764260359, now seen corresponding path program 60 times [2021-06-12 22:17:19,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:19,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818467127] [2021-06-12 22:17:19,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:19,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:19,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818467127] [2021-06-12 22:17:19,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818467127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:19,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133615192] [2021-06-12 22:17:19,656 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 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 [2021-06-12 22:17:19,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:17:19,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:19,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 22:17:19,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:19,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:19,917 INFO L354 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2021-06-12 22:17:19,917 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 53 treesize of output 35 [2021-06-12 22:17:19,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:19,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:19,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:19,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:19,944 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 62 treesize of output 58 [2021-06-12 22:17:19,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:19,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:19,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:19,979 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-06-12 22:17:19,979 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 51 treesize of output 39 [2021-06-12 22:17:19,982 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,020 INFO L354 Elim1Store]: treesize reduction 20, result has 25.9 percent of original size [2021-06-12 22:17:20,021 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 42 treesize of output 28 [2021-06-12 22:17:20,021 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,050 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-06-12 22:17:20,050 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 35 [2021-06-12 22:17:20,053 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,071 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,071 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 45 treesize of output 1 [2021-06-12 22:17:20,072 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,107 INFO L354 Elim1Store]: treesize reduction 4, result has 85.2 percent of original size [2021-06-12 22:17:20,107 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 46 treesize of output 46 [2021-06-12 22:17:20,110 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,126 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,127 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 38 treesize of output 20 [2021-06-12 22:17:20,128 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,146 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,146 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 1 [2021-06-12 22:17:20,147 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,163 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,163 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 18 [2021-06-12 22:17:20,165 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,181 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,181 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 38 treesize of output 20 [2021-06-12 22:17:20,183 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,201 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,201 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 54 treesize of output 1 [2021-06-12 22:17:20,202 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,219 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,219 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 47 treesize of output 1 [2021-06-12 22:17:20,220 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,238 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,238 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 49 treesize of output 1 [2021-06-12 22:17:20,238 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,255 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-06-12 22:17:20,255 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 39 treesize of output 1 [2021-06-12 22:17:20,256 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:20,274 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-06-12 22:17:20,275 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 54 treesize of output 35 [2021-06-12 22:17:20,276 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:20,362 INFO L628 ElimStorePlain]: treesize reduction 130, result has 35.0 percent of original size [2021-06-12 22:17:20,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:17:20,364 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:929, output treesize:70 [2021-06-12 22:17:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:20,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133615192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:20,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:20,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 22:17:20,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700381322] [2021-06-12 22:17:20,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:17:20,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:20,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:17:20,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:17:20,482 INFO L87 Difference]: Start difference. First operand 1905 states and 6453 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:21,946 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-06-12 22:17:22,097 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-06-12 22:17:22,220 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-06-12 22:17:22,506 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2021-06-12 22:17:22,697 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-06-12 22:17:23,267 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-06-12 22:17:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:23,424 INFO L93 Difference]: Finished difference Result 2960 states and 9357 transitions. [2021-06-12 22:17:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:17:23,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:23,427 INFO L225 Difference]: With dead ends: 2960 [2021-06-12 22:17:23,428 INFO L226 Difference]: Without dead ends: 2916 [2021-06-12 22:17:23,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 2789.6ms TimeCoverageRelationStatistics Valid=496, Invalid=1856, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:17:23,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2916 states. [2021-06-12 22:17:23,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2916 to 1933. [2021-06-12 22:17:23,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1933 states, 1932 states have (on average 3.391821946169772) internal successors, (6553), 1932 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1933 states to 1933 states and 6553 transitions. [2021-06-12 22:17:23,453 INFO L78 Accepts]: Start accepts. Automaton has 1933 states and 6553 transitions. Word has length 26 [2021-06-12 22:17:23,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:23,453 INFO L482 AbstractCegarLoop]: Abstraction has 1933 states and 6553 transitions. [2021-06-12 22:17:23,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:23,453 INFO L276 IsEmpty]: Start isEmpty. Operand 1933 states and 6553 transitions. [2021-06-12 22:17:23,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:23,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:23,455 INFO L472 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] [2021-06-12 22:17:23,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3158,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:23,655 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:23,656 INFO L82 PathProgramCache]: Analyzing trace with hash -680204241, now seen corresponding path program 51 times [2021-06-12 22:17:23,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:23,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212774985] [2021-06-12 22:17:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:23,949 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-06-12 22:17:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:24,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:24,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212774985] [2021-06-12 22:17:24,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212774985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:24,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725090173] [2021-06-12 22:17:24,233 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 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 [2021-06-12 22:17:24,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:17:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 22:17:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:24,702 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2021-06-12 22:17:24,982 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 102 [2021-06-12 22:17:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:25,127 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 22:17:25,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 53 treesize of output 1 [2021-06-12 22:17:25,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:25,145 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:17:25,146 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 46 [2021-06-12 22:17:25,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:25,321 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 86 [2021-06-12 22:17:25,322 INFO L628 ElimStorePlain]: treesize reduction 291, result has 43.3 percent of original size [2021-06-12 22:17:25,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:25,333 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:17:25,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-12 22:17:25,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:25,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:25,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:25,413 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:17:25,413 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-12 22:17:25,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:25,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:25,486 INFO L354 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2021-06-12 22:17:25,487 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 43 [2021-06-12 22:17:25,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:25,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:25,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:25,546 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-06-12 22:17:25,546 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 28 [2021-06-12 22:17:25,547 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:25,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:25,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 5 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-12 22:17:25,595 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 10 variables, input treesize:627, output treesize:83 [2021-06-12 22:17:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:25,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725090173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:25,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:25,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:17:25,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391605420] [2021-06-12 22:17:25,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:17:25,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:17:25,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:17:25,669 INFO L87 Difference]: Start difference. First operand 1933 states and 6553 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:26,966 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-06-12 22:17:27,377 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-06-12 22:17:27,577 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2021-06-12 22:17:28,165 WARN L205 SmtUtils]: Spent 515.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 134 [2021-06-12 22:17:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:28,305 INFO L93 Difference]: Finished difference Result 2443 states and 8134 transitions. [2021-06-12 22:17:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:17:28,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:28,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:28,309 INFO L225 Difference]: With dead ends: 2443 [2021-06-12 22:17:28,309 INFO L226 Difference]: Without dead ends: 2428 [2021-06-12 22:17:28,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3181.5ms TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:17:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2021-06-12 22:17:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 1948. [2021-06-12 22:17:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.389830508474576) internal successors, (6600), 1947 states have internal predecessors, (6600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6600 transitions. [2021-06-12 22:17:28,330 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6600 transitions. Word has length 26 [2021-06-12 22:17:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:28,330 INFO L482 AbstractCegarLoop]: Abstraction has 1948 states and 6600 transitions. [2021-06-12 22:17:28,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6600 transitions. [2021-06-12 22:17:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:28,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:28,332 INFO L472 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] [2021-06-12 22:17:28,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3187 [2021-06-12 22:17:28,533 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:28,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:28,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1997230275, now seen corresponding path program 52 times [2021-06-12 22:17:28,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:28,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120130794] [2021-06-12 22:17:28,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:28,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:28,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120130794] [2021-06-12 22:17:28,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120130794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:28,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729389330] [2021-06-12 22:17:28,922 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 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 [2021-06-12 22:17:28,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:17:28,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:17:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:29,355 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-06-12 22:17:29,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:29,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:29,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:17:29,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:29,562 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2021-06-12 22:17:29,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:29,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:29,575 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:17:29,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-12 22:17:29,577 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:29,707 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:17:29,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:29,721 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:17:29,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:17:29,722 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:29,849 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2021-06-12 22:17:29,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:29,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:29,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:17:29,863 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:29,990 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-06-12 22:17:29,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:29,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:30,003 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:17:30,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:17:30,004 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:30,124 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2021-06-12 22:17:30,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:30,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:17:30,138 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:30,255 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-06-12 22:17:30,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:30,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:17:30,269 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:30,378 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 22:17:30,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:30,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:17:30,390 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:30,495 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-06-12 22:17:30,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:30,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:17:30,503 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-12 22:17:30,653 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-06-12 22:17:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:30,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729389330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:30,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:30,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:17:30,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532117118] [2021-06-12 22:17:30,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:17:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:17:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:17:30,731 INFO L87 Difference]: Start difference. First operand 1948 states and 6600 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:31,070 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-06-12 22:17:31,698 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2021-06-12 22:17:31,833 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2021-06-12 22:17:32,118 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2021-06-12 22:17:32,458 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 22:17:32,853 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2021-06-12 22:17:33,131 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-06-12 22:17:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:33,319 INFO L93 Difference]: Finished difference Result 2746 states and 9083 transitions. [2021-06-12 22:17:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:17:33,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:33,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:33,322 INFO L225 Difference]: With dead ends: 2746 [2021-06-12 22:17:33,322 INFO L226 Difference]: Without dead ends: 2731 [2021-06-12 22:17:33,323 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2857.6ms TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:17:33,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-06-12 22:17:33,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 1943. [2021-06-12 22:17:33,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 3.388774459320288) internal successors, (6581), 1942 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 6581 transitions. [2021-06-12 22:17:33,354 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 6581 transitions. Word has length 26 [2021-06-12 22:17:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:33,354 INFO L482 AbstractCegarLoop]: Abstraction has 1943 states and 6581 transitions. [2021-06-12 22:17:33,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:33,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 6581 transitions. [2021-06-12 22:17:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:33,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:33,357 INFO L472 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] [2021-06-12 22:17:33,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3206,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:33,557 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash 307287371, now seen corresponding path program 53 times [2021-06-12 22:17:33,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:33,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807962422] [2021-06-12 22:17:33,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:33,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:33,878 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2021-06-12 22:17:34,065 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-12 22:17:34,212 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2021-06-12 22:17:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:34,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:34,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807962422] [2021-06-12 22:17:34,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807962422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:34,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218864902] [2021-06-12 22:17:34,311 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 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 [2021-06-12 22:17:34,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:17:34,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:17:34,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:34,860 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-06-12 22:17:34,955 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_446], 3=[v_prenex_445, v_prenex_447], 6=[A]} [2021-06-12 22:17:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:34,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:34,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:17:34,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:34,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:34,983 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-06-12 22:17:34,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-06-12 22:17:34,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:35,304 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 99 [2021-06-12 22:17:35,304 INFO L628 ElimStorePlain]: treesize reduction 3, result has 99.4 percent of original size [2021-06-12 22:17:35,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:35,321 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-12 22:17:35,321 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 42 [2021-06-12 22:17:35,323 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:35,337 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-06-12 22:17:35,337 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 49 [2021-06-12 22:17:35,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:35,623 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2021-06-12 22:17:35,624 INFO L628 ElimStorePlain]: treesize reduction 36, result has 91.4 percent of original size [2021-06-12 22:17:35,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:35,642 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:17:35,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 43 [2021-06-12 22:17:35,645 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:35,656 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-06-12 22:17:35,656 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-06-12 22:17:35,657 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:35,770 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-06-12 22:17:35,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:35,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:35,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:35,805 INFO L354 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2021-06-12 22:17:35,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 79 treesize of output 59 [2021-06-12 22:17:35,807 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:35,815 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-06-12 22:17:35,815 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 1 [2021-06-12 22:17:35,816 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:35,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:35,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:17:35,903 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:518, output treesize:190 [2021-06-12 22:17:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:36,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218864902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:36,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:36,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 22:17:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573009897] [2021-06-12 22:17:36,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:17:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:17:36,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:17:36,091 INFO L87 Difference]: Start difference. First operand 1943 states and 6581 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:36,473 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 47 [2021-06-12 22:17:36,969 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2021-06-12 22:17:37,164 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2021-06-12 22:17:37,675 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 22:17:38,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:38,058 INFO L93 Difference]: Finished difference Result 2604 states and 8626 transitions. [2021-06-12 22:17:38,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 22:17:38,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:38,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:38,062 INFO L225 Difference]: With dead ends: 2604 [2021-06-12 22:17:38,062 INFO L226 Difference]: Without dead ends: 2579 [2021-06-12 22:17:38,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2658.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:17:38,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2579 states. [2021-06-12 22:17:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2579 to 1939. [2021-06-12 22:17:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1938 states have (on average 3.392672858617131) internal successors, (6575), 1938 states have internal predecessors, (6575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 6575 transitions. [2021-06-12 22:17:38,092 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 6575 transitions. Word has length 26 [2021-06-12 22:17:38,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:38,092 INFO L482 AbstractCegarLoop]: Abstraction has 1939 states and 6575 transitions. [2021-06-12 22:17:38,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 6575 transitions. [2021-06-12 22:17:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:38,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:38,094 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:38,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3220 [2021-06-12 22:17:38,297 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:38,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1089911327, now seen corresponding path program 61 times [2021-06-12 22:17:38,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:38,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119016609] [2021-06-12 22:17:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:38,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119016609] [2021-06-12 22:17:38,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119016609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:38,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483220735] [2021-06-12 22:17:38,609 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 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 [2021-06-12 22:17:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:38,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:17:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:39,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,108 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 114 treesize of output 1 [2021-06-12 22:17:39,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,137 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-12 22:17:39,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 63 [2021-06-12 22:17:39,138 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,155 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 121 treesize of output 62 [2021-06-12 22:17:39,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,184 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-12 22:17:39,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 65 [2021-06-12 22:17:39,185 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,203 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 1 [2021-06-12 22:17:39,204 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,221 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 126 treesize of output 1 [2021-06-12 22:17:39,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,239 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 167 treesize of output 1 [2021-06-12 22:17:39,240 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,267 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-12 22:17:39,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 162 treesize of output 74 [2021-06-12 22:17:39,269 INFO L550 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,286 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 1 [2021-06-12 22:17:39,286 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,304 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 100 treesize of output 1 [2021-06-12 22:17:39,304 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,320 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-12 22:17:39,321 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,346 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-12 22:17:39,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 69 [2021-06-12 22:17:39,347 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,364 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 109 treesize of output 1 [2021-06-12 22:17:39,365 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,380 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 1 [2021-06-12 22:17:39,381 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,396 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:17:39,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-12 22:17:39,396 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:39,402 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-06-12 22:17:39,402 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 54 [2021-06-12 22:17:39,403 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:39,445 INFO L628 ElimStorePlain]: treesize reduction 66, result has 37.1 percent of original size [2021-06-12 22:17:39,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:17:39,446 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:2101, output treesize:27 [2021-06-12 22:17:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:39,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483220735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:39,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:39,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 22:17:39,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725594376] [2021-06-12 22:17:39,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:17:39,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:39,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:17:39,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:17:39,480 INFO L87 Difference]: Start difference. First operand 1939 states and 6575 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:40,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:40,956 INFO L93 Difference]: Finished difference Result 2711 states and 8858 transitions. [2021-06-12 22:17:40,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:17:40,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:40,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:40,960 INFO L225 Difference]: With dead ends: 2711 [2021-06-12 22:17:40,960 INFO L226 Difference]: Without dead ends: 2674 [2021-06-12 22:17:40,960 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1643.8ms TimeCoverageRelationStatistics Valid=307, Invalid=1253, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:17:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2021-06-12 22:17:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 1951. [2021-06-12 22:17:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-12 22:17:40,983 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-12 22:17:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:40,983 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-12 22:17:40,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:40,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-12 22:17:40,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:40,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:40,985 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:41,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3251,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:41,186 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash -164417461, now seen corresponding path program 62 times [2021-06-12 22:17:41,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:41,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750350181] [2021-06-12 22:17:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:41,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:41,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750350181] [2021-06-12 22:17:41,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750350181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:41,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601726772] [2021-06-12 22:17:41,526 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 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 [2021-06-12 22:17:41,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:17:41,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:41,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:17:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:41,860 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-06-12 22:17:41,898 INFO L446 ElimStorePlain]: Different costs {3=[v_prenex_448, v_prenex_452], 6=[A, v_prenex_450]} [2021-06-12 22:17:41,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:41,915 INFO L354 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2021-06-12 22:17:41,915 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 41 [2021-06-12 22:17:41,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:41,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:41,925 INFO L354 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2021-06-12 22:17:41,925 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 1 [2021-06-12 22:17:41,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:42,060 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 78 [2021-06-12 22:17:42,060 INFO L628 ElimStorePlain]: treesize reduction 303, result has 45.9 percent of original size [2021-06-12 22:17:42,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:42,065 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 34 treesize of output 18 [2021-06-12 22:17:42,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:42,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:42,129 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 22:17:42,129 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 101 treesize of output 52 [2021-06-12 22:17:42,131 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: and 1 xjuncts. [2021-06-12 22:17:42,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:42,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:42,186 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 22:17:42,186 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 47 [2021-06-12 22:17:42,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:42,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:42,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:17:42,232 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:691, output treesize:55 [2021-06-12 22:17:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:42,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601726772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:42,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:42,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:17:42,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032490222] [2021-06-12 22:17:42,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:17:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:42,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:17:42,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:17:42,290 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:43,882 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-06-12 22:17:44,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:44,040 INFO L93 Difference]: Finished difference Result 2506 states and 8326 transitions. [2021-06-12 22:17:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 22:17:44,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:44,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:44,043 INFO L225 Difference]: With dead ends: 2506 [2021-06-12 22:17:44,044 INFO L226 Difference]: Without dead ends: 2491 [2021-06-12 22:17:44,044 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1931.4ms TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 22:17:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-12 22:17:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1951. [2021-06-12 22:17:44,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 3.3897435897435897) internal successors, (6610), 1950 states have internal predecessors, (6610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:44,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 6610 transitions. [2021-06-12 22:17:44,065 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 6610 transitions. Word has length 26 [2021-06-12 22:17:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:44,065 INFO L482 AbstractCegarLoop]: Abstraction has 1951 states and 6610 transitions. [2021-06-12 22:17:44,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:44,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 6610 transitions. [2021-06-12 22:17:44,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:44,067 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:44,067 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:17:44,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3309 [2021-06-12 22:17:44,268 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:44,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1406408139, now seen corresponding path program 63 times [2021-06-12 22:17:44,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:44,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82600276] [2021-06-12 22:17:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:44,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:44,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82600276] [2021-06-12 22:17:44,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82600276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:44,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780265941] [2021-06-12 22:17:44,565 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 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 [2021-06-12 22:17:44,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:17:44,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:44,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 22:17:44,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:44,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,897 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-12 22:17:44,898 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 65 treesize of output 49 [2021-06-12 22:17:44,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,925 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-12 22:17:44,926 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 46 treesize of output 36 [2021-06-12 22:17:44,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:44,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,955 INFO L354 Elim1Store]: treesize reduction 12, result has 61.3 percent of original size [2021-06-12 22:17:44,955 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 53 treesize of output 47 [2021-06-12 22:17:44,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:44,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,982 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-12 22:17:44,982 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 29 [2021-06-12 22:17:44,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:44,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,012 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-12 22:17:45,012 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 65 treesize of output 49 [2021-06-12 22:17:45,014 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,031 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,031 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 46 treesize of output 26 [2021-06-12 22:17:45,032 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,050 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,050 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 48 treesize of output 1 [2021-06-12 22:17:45,051 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,077 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-12 22:17:45,078 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 75 treesize of output 47 [2021-06-12 22:17:45,079 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,104 INFO L354 Elim1Store]: treesize reduction 24, result has 22.6 percent of original size [2021-06-12 22:17:45,104 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 55 treesize of output 35 [2021-06-12 22:17:45,105 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,123 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,123 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 48 treesize of output 1 [2021-06-12 22:17:45,123 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,141 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,141 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 53 treesize of output 1 [2021-06-12 22:17:45,141 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,159 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,159 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 58 treesize of output 1 [2021-06-12 22:17:45,160 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,178 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,178 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 63 treesize of output 1 [2021-06-12 22:17:45,178 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,195 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,196 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 58 treesize of output 1 [2021-06-12 22:17:45,196 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,212 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,212 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 51 treesize of output 29 [2021-06-12 22:17:45,213 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:45,224 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:17:45,224 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 63 treesize of output 1 [2021-06-12 22:17:45,224 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:45,363 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-06-12 22:17:45,363 INFO L628 ElimStorePlain]: treesize reduction 192, result has 43.0 percent of original size [2021-06-12 22:17:45,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:17:45,364 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1321, output treesize:145 [2021-06-12 22:17:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:45,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780265941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:45,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:45,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-06-12 22:17:45,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955186494] [2021-06-12 22:17:45,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 22:17:45,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 22:17:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:17:45,653 INFO L87 Difference]: Start difference. First operand 1951 states and 6610 transitions. Second operand has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:46,380 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-12 22:17:47,043 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-12 22:17:47,186 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-06-12 22:17:47,526 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2021-06-12 22:17:48,130 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-12 22:17:48,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:48,502 INFO L93 Difference]: Finished difference Result 2931 states and 9407 transitions. [2021-06-12 22:17:48,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 22:17:48,503 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:48,506 INFO L225 Difference]: With dead ends: 2931 [2021-06-12 22:17:48,506 INFO L226 Difference]: Without dead ends: 2858 [2021-06-12 22:17:48,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 2775.1ms TimeCoverageRelationStatistics Valid=461, Invalid=1795, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:17:48,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-06-12 22:17:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2137. [2021-06-12 22:17:48,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2136 states have (on average 3.387172284644195) internal successors, (7235), 2136 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 7235 transitions. [2021-06-12 22:17:48,532 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 7235 transitions. Word has length 26 [2021-06-12 22:17:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:48,532 INFO L482 AbstractCegarLoop]: Abstraction has 2137 states and 7235 transitions. [2021-06-12 22:17:48,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 7235 transitions. [2021-06-12 22:17:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:48,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:48,534 INFO L472 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] [2021-06-12 22:17:48,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3321,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:48,735 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:48,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash -958901773, now seen corresponding path program 54 times [2021-06-12 22:17:48,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:48,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566003524] [2021-06-12 22:17:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:49,061 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2021-06-12 22:17:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:49,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:49,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566003524] [2021-06-12 22:17:49,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566003524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:49,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430315823] [2021-06-12 22:17:49,210 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 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 [2021-06-12 22:17:49,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:17:49,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:17:49,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 22:17:49,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:49,770 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-06-12 22:17:50,019 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-06-12 22:17:50,155 INFO L446 ElimStorePlain]: Different costs {2=[v_prenex_464, v_prenex_466, v_prenex_468], 3=[A, v_prenex_462, v_prenex_463, v_prenex_465, v_prenex_467]} [2021-06-12 22:17:50,180 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:17:50,181 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 35 treesize of output 33 [2021-06-12 22:17:50,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:50,367 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2021-06-12 22:17:50,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:50,408 INFO L354 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2021-06-12 22:17:50,408 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 30 [2021-06-12 22:17:50,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:50,604 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2021-06-12 22:17:50,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:50,624 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:50,624 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 21 treesize of output 29 [2021-06-12 22:17:50,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:50,794 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2021-06-12 22:17:50,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:50,814 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-06-12 22:17:50,815 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 53 [2021-06-12 22:17:50,816 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:50,978 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2021-06-12 22:17:50,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:51,003 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:17:51,003 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 64 [2021-06-12 22:17:51,005 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:51,164 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2021-06-12 22:17:51,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:51,186 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:17:51,186 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 60 [2021-06-12 22:17:51,188 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:51,347 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-06-12 22:17:51,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:51,371 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-06-12 22:17:51,371 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 71 [2021-06-12 22:17:51,373 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:51,531 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-06-12 22:17:51,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:51,552 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-06-12 22:17:51,552 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 57 [2021-06-12 22:17:51,554 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:51,718 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-06-12 22:17:51,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:51,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:17:51,733 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:606, output treesize:480 [2021-06-12 22:17:51,953 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2021-06-12 22:17:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:52,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430315823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:52,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:52,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-12 22:17:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898403037] [2021-06-12 22:17:52,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:17:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:52,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:17:52,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:17:52,046 INFO L87 Difference]: Start difference. First operand 2137 states and 7235 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:52,710 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2021-06-12 22:17:52,856 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-06-12 22:17:53,498 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-06-12 22:17:53,926 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 84 [2021-06-12 22:17:54,231 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-06-12 22:17:55,117 WARN L205 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 103 [2021-06-12 22:17:55,633 WARN L205 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 129 [2021-06-12 22:17:56,583 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 123 [2021-06-12 22:17:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:17:57,063 INFO L93 Difference]: Finished difference Result 2788 states and 9199 transitions. [2021-06-12 22:17:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:17:57,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:17:57,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:17:57,066 INFO L225 Difference]: With dead ends: 2788 [2021-06-12 22:17:57,067 INFO L226 Difference]: Without dead ends: 2773 [2021-06-12 22:17:57,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 5003.1ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 22:17:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2021-06-12 22:17:57,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2145. [2021-06-12 22:17:57,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 2144 states have (on average 3.3857276119402986) internal successors, (7259), 2144 states have internal predecessors, (7259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 7259 transitions. [2021-06-12 22:17:57,091 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 7259 transitions. Word has length 26 [2021-06-12 22:17:57,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:17:57,091 INFO L482 AbstractCegarLoop]: Abstraction has 2145 states and 7259 transitions. [2021-06-12 22:17:57,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:57,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 7259 transitions. [2021-06-12 22:17:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:17:57,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:17:57,093 INFO L472 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] [2021-06-12 22:17:57,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:17:57,294 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:17:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:17:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1718532743, now seen corresponding path program 55 times [2021-06-12 22:17:57,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:17:57,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100918130] [2021-06-12 22:17:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:17:57,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:57,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:17:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100918130] [2021-06-12 22:17:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100918130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193819617] [2021-06-12 22:17:57,765 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 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 [2021-06-12 22:17:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:17:57,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:17:57,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:17:58,207 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-06-12 22:17:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:58,278 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:17:58,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 25 [2021-06-12 22:17:58,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:58,408 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-06-12 22:17:58,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:58,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-06-12 22:17:58,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:58,555 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-06-12 22:17:58,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:58,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-06-12 22:17:58,570 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:58,708 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-06-12 22:17:58,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:58,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2021-06-12 22:17:58,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:58,847 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-06-12 22:17:58,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:58,860 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:17:58,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:17:58,861 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:58,980 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-06-12 22:17:58,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:58,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:58,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2021-06-12 22:17:58,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:59,111 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2021-06-12 22:17:59,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:59,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:59,122 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 22:17:59,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 20 [2021-06-12 22:17:59,124 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:59,237 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-06-12 22:17:59,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:59,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:17:59,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:59,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-06-12 22:17:59,250 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:17:59,355 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-06-12 22:17:59,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:17:59,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 8 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-06-12 22:17:59,363 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 16 variables, input treesize:377, output treesize:216 [2021-06-12 22:17:59,492 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2021-06-12 22:17:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:17:59,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193819617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:17:59,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:17:59,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:17:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610881307] [2021-06-12 22:17:59,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:17:59,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:17:59,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:17:59,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:17:59,567 INFO L87 Difference]: Start difference. First operand 2145 states and 7259 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:17:59,923 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-12 22:18:00,808 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-06-12 22:18:01,171 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 79 [2021-06-12 22:18:01,415 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-12 22:18:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:01,669 INFO L93 Difference]: Finished difference Result 2992 states and 9916 transitions. [2021-06-12 22:18:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 22:18:01,670 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:18:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:01,673 INFO L225 Difference]: With dead ends: 2992 [2021-06-12 22:18:01,674 INFO L226 Difference]: Without dead ends: 2977 [2021-06-12 22:18:01,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 2380.0ms TimeCoverageRelationStatistics Valid=217, Invalid=839, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 22:18:01,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2977 states. [2021-06-12 22:18:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2977 to 2139. [2021-06-12 22:18:01,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 3.3835360149672593) internal successors, (7234), 2138 states have internal predecessors, (7234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 7234 transitions. [2021-06-12 22:18:01,699 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 7234 transitions. Word has length 26 [2021-06-12 22:18:01,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:01,699 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 7234 transitions. [2021-06-12 22:18:01,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 7234 transitions. [2021-06-12 22:18:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:18:01,702 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:01,702 INFO L472 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] [2021-06-12 22:18:01,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3367 [2021-06-12 22:18:01,902 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash 28589839, now seen corresponding path program 56 times [2021-06-12 22:18:01,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:01,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126200145] [2021-06-12 22:18:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:02,266 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-06-12 22:18:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:02,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126200145] [2021-06-12 22:18:02,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126200145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:02,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022188226] [2021-06-12 22:18:02,430 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 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 [2021-06-12 22:18:02,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:02,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:18:02,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,677 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:18:02,677 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 57 [2021-06-12 22:18:02,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,693 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-12 22:18:02,694 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 43 [2021-06-12 22:18:02,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,709 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-12 22:18:02,709 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-06-12 22:18:02,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,720 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:18:02,721 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 54 [2021-06-12 22:18:02,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,737 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:18:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-12 22:18:02,739 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,753 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-06-12 22:18:02,753 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 53 [2021-06-12 22:18:02,754 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,771 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:18:02,771 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 50 [2021-06-12 22:18:02,772 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,782 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:18:02,782 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-12 22:18:02,783 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,793 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:18:02,793 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 39 [2021-06-12 22:18:02,794 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,804 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:18:02,804 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-12 22:18:02,805 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,814 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:18:02,814 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 51 [2021-06-12 22:18:02,815 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,825 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:18:02,825 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-12 22:18:02,825 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,835 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:18:02,835 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 47 [2021-06-12 22:18:02,836 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,846 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-06-12 22:18:02,846 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 104 treesize of output 55 [2021-06-12 22:18:02,846 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:02,863 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-06-12 22:18:02,864 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 106 treesize of output 65 [2021-06-12 22:18:02,865 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,869 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-06-12 22:18:02,869 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 54 [2021-06-12 22:18:02,870 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:02,977 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2021-06-12 22:18:02,977 INFO L628 ElimStorePlain]: treesize reduction 123, result has 39.4 percent of original size [2021-06-12 22:18:02,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-12 22:18:02,978 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1445, output treesize:80 [2021-06-12 22:18:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:03,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022188226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:03,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:03,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-12 22:18:03,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689212604] [2021-06-12 22:18:03,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:18:03,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:03,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:18:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:18:03,106 INFO L87 Difference]: Start difference. First operand 2139 states and 7234 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:03,379 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2021-06-12 22:18:04,029 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2021-06-12 22:18:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:04,492 INFO L93 Difference]: Finished difference Result 2826 states and 9360 transitions. [2021-06-12 22:18:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:18:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:18:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:04,496 INFO L225 Difference]: With dead ends: 2826 [2021-06-12 22:18:04,496 INFO L226 Difference]: Without dead ends: 2801 [2021-06-12 22:18:04,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1716.7ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:18:04,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-12 22:18:04,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2126. [2021-06-12 22:18:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-12 22:18:04,521 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-12 22:18:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:04,521 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-12 22:18:04,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-12 22:18:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:18:04,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:04,523 INFO L472 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] [2021-06-12 22:18:04,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-06-12 22:18:04,737 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1781836725, now seen corresponding path program 57 times [2021-06-12 22:18:04,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:04,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341076972] [2021-06-12 22:18:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:05,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:05,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341076972] [2021-06-12 22:18:05,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341076972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:05,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300253598] [2021-06-12 22:18:05,167 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 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 [2021-06-12 22:18:05,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:18:05,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 22:18:05,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:05,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:05,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:05,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:05,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-06-12 22:18:05,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:05,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:05,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:05,583 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:18:05,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 30 [2021-06-12 22:18:05,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:05,923 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2021-06-12 22:18:05,923 INFO L628 ElimStorePlain]: treesize reduction 12, result has 97.7 percent of original size [2021-06-12 22:18:05,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:05,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:05,939 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-06-12 22:18:05,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2021-06-12 22:18:05,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:05,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:05,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:05,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:05,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-06-12 22:18:05,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:06,223 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2021-06-12 22:18:06,224 INFO L628 ElimStorePlain]: treesize reduction 32, result has 92.9 percent of original size [2021-06-12 22:18:06,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:06,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:06,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:06,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 56 [2021-06-12 22:18:06,240 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:06,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:06,249 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 22:18:06,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 1 [2021-06-12 22:18:06,250 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:06,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:06,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:06,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:06,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:06,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 41 [2021-06-12 22:18:06,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:06,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:06,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:06,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:06,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-06-12 22:18:06,377 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:06,623 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-06-12 22:18:06,623 INFO L628 ElimStorePlain]: treesize reduction 10, result has 95.5 percent of original size [2021-06-12 22:18:06,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-06-12 22:18:06,629 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 8 variables, input treesize:559, output treesize:189 [2021-06-12 22:18:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:06,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300253598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:06,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:06,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-12 22:18:06,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222681696] [2021-06-12 22:18:06,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:18:06,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:06,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:18:06,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:18:06,809 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:07,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:07,834 INFO L93 Difference]: Finished difference Result 2742 states and 9142 transitions. [2021-06-12 22:18:07,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:18:07,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:18:07,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:07,838 INFO L225 Difference]: With dead ends: 2742 [2021-06-12 22:18:07,838 INFO L226 Difference]: Without dead ends: 2727 [2021-06-12 22:18:07,838 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1251.9ms TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-06-12 22:18:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-06-12 22:18:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2126. [2021-06-12 22:18:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.3835294117647057) internal successors, (7190), 2125 states have internal predecessors, (7190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7190 transitions. [2021-06-12 22:18:07,862 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7190 transitions. Word has length 26 [2021-06-12 22:18:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:07,862 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7190 transitions. [2021-06-12 22:18:07,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7190 transitions. [2021-06-12 22:18:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:18:07,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:07,864 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:08,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3389,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:08,065 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash -529489601, now seen corresponding path program 64 times [2021-06-12 22:18:08,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:08,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113238838] [2021-06-12 22:18:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:08,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:08,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113238838] [2021-06-12 22:18:08,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113238838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:08,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018427090] [2021-06-12 22:18:08,389 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 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 [2021-06-12 22:18:08,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:08,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:08,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:18:08,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:08,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,811 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:08,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-12 22:18:08,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,828 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:08,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 124 treesize of output 1 [2021-06-12 22:18:08,829 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,854 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-12 22:18:08,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 50 [2021-06-12 22:18:08,855 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,870 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:08,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 42 [2021-06-12 22:18:08,872 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,888 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:08,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 1 [2021-06-12 22:18:08,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,905 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:08,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 1 [2021-06-12 22:18:08,906 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,930 INFO L354 Elim1Store]: treesize reduction 30, result has 18.9 percent of original size [2021-06-12 22:18:08,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 57 [2021-06-12 22:18:08,932 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,949 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:08,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 1 [2021-06-12 22:18:08,949 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,966 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:08,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 1 [2021-06-12 22:18:08,967 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,983 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:08,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 47 [2021-06-12 22:18:08,985 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,001 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 71 treesize of output 45 [2021-06-12 22:18:09,003 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:09,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,020 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:09,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 129 treesize of output 1 [2021-06-12 22:18:09,021 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:09,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,037 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:09,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 66 treesize of output 1 [2021-06-12 22:18:09,038 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:09,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,055 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:09,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 1 [2021-06-12 22:18:09,056 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,095 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-06-12 22:18:09,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 90 treesize of output 1 [2021-06-12 22:18:09,096 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:09,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:09,110 INFO L354 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2021-06-12 22:18:09,110 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 55 [2021-06-12 22:18:09,112 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:09,156 INFO L628 ElimStorePlain]: treesize reduction 74, result has 35.7 percent of original size [2021-06-12 22:18:09,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:18:09,157 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 2 variables, input treesize:1653, output treesize:29 [2021-06-12 22:18:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:09,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018427090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:09,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:09,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-06-12 22:18:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45611417] [2021-06-12 22:18:09,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:18:09,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:18:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:18:09,200 INFO L87 Difference]: Start difference. First operand 2126 states and 7190 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:10,518 INFO L93 Difference]: Finished difference Result 2821 states and 9363 transitions. [2021-06-12 22:18:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 22:18:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:18:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:10,522 INFO L225 Difference]: With dead ends: 2821 [2021-06-12 22:18:10,522 INFO L226 Difference]: Without dead ends: 2799 [2021-06-12 22:18:10,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1400.2ms TimeCoverageRelationStatistics Valid=289, Invalid=1043, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:18:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-12 22:18:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2120. [2021-06-12 22:18:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.382255781028787) internal successors, (7167), 2119 states have internal predecessors, (7167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:10,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7167 transitions. [2021-06-12 22:18:10,547 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7167 transitions. Word has length 26 [2021-06-12 22:18:10,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:10,547 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7167 transitions. [2021-06-12 22:18:10,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:10,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7167 transitions. [2021-06-12 22:18:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:18:10,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:10,549 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:10,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3408 [2021-06-12 22:18:10,750 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:10,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:10,750 INFO L82 PathProgramCache]: Analyzing trace with hash -815414513, now seen corresponding path program 65 times [2021-06-12 22:18:10,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:10,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241709055] [2021-06-12 22:18:10,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:10,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:11,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241709055] [2021-06-12 22:18:11,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241709055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:11,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369901334] [2021-06-12 22:18:11,098 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 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 [2021-06-12 22:18:11,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:18:11,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:11,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 22:18:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:11,426 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-06-12 22:18:11,488 INFO L446 ElimStorePlain]: Different costs {3=[A, v_prenex_493], 5=[v_prenex_491, v_prenex_495]} [2021-06-12 22:18:11,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:11,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:11,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:11,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:11,497 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 39 treesize of output 18 [2021-06-12 22:18:11,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:11,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:11,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:11,504 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 34 treesize of output 18 [2021-06-12 22:18:11,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:11,633 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2021-06-12 22:18:11,633 INFO L628 ElimStorePlain]: treesize reduction 195, result has 44.9 percent of original size [2021-06-12 22:18:11,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:11,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:11,637 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 24 treesize of output 12 [2021-06-12 22:18:11,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:11,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:11,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:11,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:11,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:11,686 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 28 treesize of output 14 [2021-06-12 22:18:11,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:11,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:11,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:11,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:11,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 22:18:11,729 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 48 treesize of output 24 [2021-06-12 22:18:11,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:11,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:11,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-12 22:18:11,766 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:429, output treesize:55 [2021-06-12 22:18:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:11,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369901334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:11,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:11,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-06-12 22:18:11,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269223174] [2021-06-12 22:18:11,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 22:18:11,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:11,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 22:18:11,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:18:11,810 INFO L87 Difference]: Start difference. First operand 2120 states and 7167 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:13,147 INFO L93 Difference]: Finished difference Result 2661 states and 8818 transitions. [2021-06-12 22:18:13,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:18:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:18:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:13,151 INFO L225 Difference]: With dead ends: 2661 [2021-06-12 22:18:13,151 INFO L226 Difference]: Without dead ends: 2642 [2021-06-12 22:18:13,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1468.7ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:18:13,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-12 22:18:13,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2120. [2021-06-12 22:18:13,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-12 22:18:13,174 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-12 22:18:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:13,175 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-12 22:18:13,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-12 22:18:13,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 22:18:13,177 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:13,177 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:13,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3466,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:13,377 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1107808399, now seen corresponding path program 66 times [2021-06-12 22:18:13,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:13,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885569988] [2021-06-12 22:18:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:13,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:13,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885569988] [2021-06-12 22:18:13,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885569988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:13,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44968836] [2021-06-12 22:18:13,680 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 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 [2021-06-12 22:18:13,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:18:13,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:13,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 22:18:13,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:13,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:13,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:13,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:13,966 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-12 22:18:13,966 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 51 treesize of output 55 [2021-06-12 22:18:13,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:13,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:13,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:13,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:13,999 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-12 22:18:13,999 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 53 treesize of output 43 [2021-06-12 22:18:14,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,027 INFO L354 Elim1Store]: treesize reduction 16, result has 48.4 percent of original size [2021-06-12 22:18:14,027 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 48 treesize of output 40 [2021-06-12 22:18:14,028 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,054 INFO L354 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2021-06-12 22:18:14,054 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 58 treesize of output 42 [2021-06-12 22:18:14,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,071 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:18:14,071 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 23 [2021-06-12 22:18:14,072 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,106 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-06-12 22:18:14,106 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 55 treesize of output 55 [2021-06-12 22:18:14,109 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,125 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:18:14,125 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 46 treesize of output 26 [2021-06-12 22:18:14,126 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 22:18:14,154 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 75 treesize of output 71 [2021-06-12 22:18:14,163 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,190 INFO L354 Elim1Store]: treesize reduction 19, result has 38.7 percent of original size [2021-06-12 22:18:14,190 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 53 treesize of output 40 [2021-06-12 22:18:14,191 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,207 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:18:14,207 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 46 treesize of output 26 [2021-06-12 22:18:14,209 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,235 INFO L354 Elim1Store]: treesize reduction 23, result has 25.8 percent of original size [2021-06-12 22:18:14,235 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 65 treesize of output 42 [2021-06-12 22:18:14,236 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,253 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:18:14,254 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 63 treesize of output 1 [2021-06-12 22:18:14,254 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,271 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:18:14,271 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 48 treesize of output 1 [2021-06-12 22:18:14,271 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,289 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:18:14,289 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 65 treesize of output 1 [2021-06-12 22:18:14,289 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,306 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:18:14,306 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 58 treesize of output 1 [2021-06-12 22:18:14,307 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 22:18:14,317 INFO L354 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2021-06-12 22:18:14,317 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 63 treesize of output 1 [2021-06-12 22:18:14,318 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-12 22:18:14,431 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 21 [2021-06-12 22:18:14,431 INFO L628 ElimStorePlain]: treesize reduction 283, result has 16.3 percent of original size [2021-06-12 22:18:14,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 22:18:14,432 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 1 variables, input treesize:1081, output treesize:55 [2021-06-12 22:18:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:14,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44968836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:14,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:14,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 22:18:14,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705280209] [2021-06-12 22:18:14,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 22:18:14,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:14,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 22:18:14,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:18:14,532 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:15,907 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-06-12 22:18:16,042 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-06-12 22:18:16,333 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2021-06-12 22:18:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:16,612 INFO L93 Difference]: Finished difference Result 2604 states and 8571 transitions. [2021-06-12 22:18:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 22:18:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 22:18:16,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:16,616 INFO L225 Difference]: With dead ends: 2604 [2021-06-12 22:18:16,616 INFO L226 Difference]: Without dead ends: 2574 [2021-06-12 22:18:16,617 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2098.3ms TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:18:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-12 22:18:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2120. [2021-06-12 22:18:16,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2119 states have (on average 3.381311939594148) internal successors, (7165), 2119 states have internal predecessors, (7165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:16,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 7165 transitions. [2021-06-12 22:18:16,640 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 7165 transitions. Word has length 26 [2021-06-12 22:18:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:16,640 INFO L482 AbstractCegarLoop]: Abstraction has 2120 states and 7165 transitions. [2021-06-12 22:18:16,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 7165 transitions. [2021-06-12 22:18:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:16,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:16,642 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:16,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3480 [2021-06-12 22:18:16,843 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1424792101, now seen corresponding path program 58 times [2021-06-12 22:18:16,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:16,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779966037] [2021-06-12 22:18:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:16,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779966037] [2021-06-12 22:18:16,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779966037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:16,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783356317] [2021-06-12 22:18:16,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:18:16,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:16,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:16,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:16,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:16,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783356317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:16,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:16,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:18:16,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580807507] [2021-06-12 22:18:16,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:16,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:16,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:16,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:16,998 INFO L87 Difference]: Start difference. First operand 2120 states and 7165 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-06-12 22:18:17,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:17,863 INFO L93 Difference]: Finished difference Result 5051 states and 15656 transitions. [2021-06-12 22:18:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:18:17,863 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-06-12 22:18:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:17,870 INFO L225 Difference]: With dead ends: 5051 [2021-06-12 22:18:17,870 INFO L226 Difference]: Without dead ends: 5051 [2021-06-12 22:18:17,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=802, Invalid=2858, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:18:17,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-12 22:18:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 2317. [2021-06-12 22:18:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 3.435233160621762) internal successors, (7956), 2316 states have internal predecessors, (7956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 7956 transitions. [2021-06-12 22:18:17,909 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 7956 transitions. Word has length 28 [2021-06-12 22:18:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:17,909 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 7956 transitions. [2021-06-12 22:18:17,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-06-12 22:18:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 7956 transitions. [2021-06-12 22:18:17,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:17,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:17,911 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:18,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3509 [2021-06-12 22:18:18,112 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:18,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:18,112 INFO L82 PathProgramCache]: Analyzing trace with hash 448473257, now seen corresponding path program 59 times [2021-06-12 22:18:18,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:18,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153954615] [2021-06-12 22:18:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:18,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:18,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:18,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153954615] [2021-06-12 22:18:18,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153954615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:18,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136501759] [2021-06-12 22:18:18,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:18:18,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:18:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:18,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:18,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136501759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:18,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:18,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:18:18,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28114268] [2021-06-12 22:18:18,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:18:18,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:18,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:18:18,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:18:18,283 INFO L87 Difference]: Start difference. First operand 2317 states and 7956 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:19,473 INFO L93 Difference]: Finished difference Result 6617 states and 20175 transitions. [2021-06-12 22:18:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:18:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:19,482 INFO L225 Difference]: With dead ends: 6617 [2021-06-12 22:18:19,482 INFO L226 Difference]: Without dead ends: 6617 [2021-06-12 22:18:19,482 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 707.0ms TimeCoverageRelationStatistics Valid=1110, Invalid=4590, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:18:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6617 states. [2021-06-12 22:18:19,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6617 to 2331. [2021-06-12 22:18:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 3.4437768240343347) internal successors, (8024), 2330 states have internal predecessors, (8024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 8024 transitions. [2021-06-12 22:18:19,534 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 8024 transitions. Word has length 28 [2021-06-12 22:18:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:19,534 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 8024 transitions. [2021-06-12 22:18:19,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 8024 transitions. [2021-06-12 22:18:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:19,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:19,536 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:19,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3510 [2021-06-12 22:18:19,744 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:19,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1977377901, now seen corresponding path program 60 times [2021-06-12 22:18:19,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:19,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943642204] [2021-06-12 22:18:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:19,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:19,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943642204] [2021-06-12 22:18:19,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943642204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:19,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133897707] [2021-06-12 22:18:19,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 22:18:19,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:18:19,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:19,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:19,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:19,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133897707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:19,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:19,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-12 22:18:19,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678764150] [2021-06-12 22:18:19,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 22:18:19,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 22:18:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 22:18:19,925 INFO L87 Difference]: Start difference. First operand 2331 states and 8024 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:21,108 INFO L93 Difference]: Finished difference Result 6008 states and 18701 transitions. [2021-06-12 22:18:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:18:21,108 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:21,116 INFO L225 Difference]: With dead ends: 6008 [2021-06-12 22:18:21,116 INFO L226 Difference]: Without dead ends: 6008 [2021-06-12 22:18:21,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=4451, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 22:18:21,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2021-06-12 22:18:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 2276. [2021-06-12 22:18:21,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.418901098901099) internal successors, (7778), 2275 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 7778 transitions. [2021-06-12 22:18:21,159 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 7778 transitions. Word has length 28 [2021-06-12 22:18:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:21,159 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 7778 transitions. [2021-06-12 22:18:21,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 7778 transitions. [2021-06-12 22:18:21,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:21,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:21,161 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:21,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3511,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:21,364 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1153995099, now seen corresponding path program 61 times [2021-06-12 22:18:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:21,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36845184] [2021-06-12 22:18:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:21,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:21,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36845184] [2021-06-12 22:18:21,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36845184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:21,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951897728] [2021-06-12 22:18:21,404 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 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 [2021-06-12 22:18:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:21,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:21,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:21,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951897728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:21,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:21,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:18:21,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586436996] [2021-06-12 22:18:21,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:21,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:21,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:21,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:21,526 INFO L87 Difference]: Start difference. First operand 2276 states and 7778 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:22,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:22,547 INFO L93 Difference]: Finished difference Result 5144 states and 15840 transitions. [2021-06-12 22:18:22,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:18:22,547 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:22,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:22,553 INFO L225 Difference]: With dead ends: 5144 [2021-06-12 22:18:22,553 INFO L226 Difference]: Without dead ends: 5144 [2021-06-12 22:18:22,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=904, Invalid=3652, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:18:22,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-06-12 22:18:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 2286. [2021-06-12 22:18:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 3.415317286652079) internal successors, (7804), 2285 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) [2021-06-12 22:18:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 7804 transitions. [2021-06-12 22:18:22,595 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 7804 transitions. Word has length 28 [2021-06-12 22:18:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:22,595 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 7804 transitions. [2021-06-12 22:18:22,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 7804 transitions. [2021-06-12 22:18:22,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:22,598 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:22,598 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:22,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3512 [2021-06-12 22:18:22,807 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:22,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:22,807 INFO L82 PathProgramCache]: Analyzing trace with hash 987823393, now seen corresponding path program 67 times [2021-06-12 22:18:22,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:22,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038636802] [2021-06-12 22:18:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:22,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:22,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038636802] [2021-06-12 22:18:22,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038636802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:22,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506266960] [2021-06-12 22:18:22,847 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 [2021-06-12 22:18:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:22,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506266960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:22,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:22,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-12 22:18:22,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490810571] [2021-06-12 22:18:22,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:22,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:22,960 INFO L87 Difference]: Start difference. First operand 2286 states and 7804 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:18:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:23,498 INFO L93 Difference]: Finished difference Result 4580 states and 14284 transitions. [2021-06-12 22:18:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:18:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-12 22:18:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:23,503 INFO L225 Difference]: With dead ends: 4580 [2021-06-12 22:18:23,504 INFO L226 Difference]: Without dead ends: 4580 [2021-06-12 22:18:23,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1339, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:18:23,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4580 states. [2021-06-12 22:18:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4580 to 2356. [2021-06-12 22:18:23,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.4) internal successors, (8007), 2355 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 8007 transitions. [2021-06-12 22:18:23,538 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 8007 transitions. Word has length 28 [2021-06-12 22:18:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:23,538 INFO L482 AbstractCegarLoop]: Abstraction has 2356 states and 8007 transitions. [2021-06-12 22:18:23,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:18:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 8007 transitions. [2021-06-12 22:18:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:23,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:23,541 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:23,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3513 [2021-06-12 22:18:23,742 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:23,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash 846454761, now seen corresponding path program 62 times [2021-06-12 22:18:23,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:23,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614703655] [2021-06-12 22:18:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:23,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:23,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:23,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614703655] [2021-06-12 22:18:23,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614703655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:23,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119859411] [2021-06-12 22:18:23,769 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 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 [2021-06-12 22:18:23,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:23,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:18:23,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:23,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119859411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:23,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:23,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:18:23,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811997308] [2021-06-12 22:18:23,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:18:23,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:23,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:18:23,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:18:23,847 INFO L87 Difference]: Start difference. First operand 2356 states and 8007 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-12 22:18:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:24,010 INFO L93 Difference]: Finished difference Result 3884 states and 12614 transitions. [2021-06-12 22:18:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:18:24,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 28 [2021-06-12 22:18:24,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:24,015 INFO L225 Difference]: With dead ends: 3884 [2021-06-12 22:18:24,015 INFO L226 Difference]: Without dead ends: 3866 [2021-06-12 22:18:24,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:18:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-06-12 22:18:24,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 2736. [2021-06-12 22:18:24,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2736 states, 2735 states have (on average 3.4661791590493602) internal successors, (9480), 2735 states have internal predecessors, (9480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2736 states to 2736 states and 9480 transitions. [2021-06-12 22:18:24,049 INFO L78 Accepts]: Start accepts. Automaton has 2736 states and 9480 transitions. Word has length 28 [2021-06-12 22:18:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:24,049 INFO L482 AbstractCegarLoop]: Abstraction has 2736 states and 9480 transitions. [2021-06-12 22:18:24,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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) [2021-06-12 22:18:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2736 states and 9480 transitions. [2021-06-12 22:18:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:24,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:24,052 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:24,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3514,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:24,253 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:24,253 INFO L82 PathProgramCache]: Analyzing trace with hash 409486053, now seen corresponding path program 63 times [2021-06-12 22:18:24,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:24,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372349978] [2021-06-12 22:18:24,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:24,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:24,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372349978] [2021-06-12 22:18:24,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372349978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:24,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098995468] [2021-06-12 22:18:24,285 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 [2021-06-12 22:18:24,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:18:24,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:24,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:24,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:24,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098995468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:24,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:24,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:18:24,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983209531] [2021-06-12 22:18:24,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:24,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:24,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:24,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:24,385 INFO L87 Difference]: Start difference. First operand 2736 states and 9480 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:24,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:24,962 INFO L93 Difference]: Finished difference Result 4561 states and 14499 transitions. [2021-06-12 22:18:24,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:18:24,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:24,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:24,968 INFO L225 Difference]: With dead ends: 4561 [2021-06-12 22:18:24,968 INFO L226 Difference]: Without dead ends: 4514 [2021-06-12 22:18:24,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=515, Invalid=1465, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 22:18:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4514 states. [2021-06-12 22:18:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4514 to 2898. [2021-06-12 22:18:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 3.486365205384881) internal successors, (10100), 2897 states have internal predecessors, (10100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 10100 transitions. [2021-06-12 22:18:25,013 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 10100 transitions. Word has length 28 [2021-06-12 22:18:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:25,013 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 10100 transitions. [2021-06-12 22:18:25,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 10100 transitions. [2021-06-12 22:18:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:25,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:25,016 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:25,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3515,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:25,229 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1945575529, now seen corresponding path program 64 times [2021-06-12 22:18:25,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:25,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191744101] [2021-06-12 22:18:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:25,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:25,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191744101] [2021-06-12 22:18:25,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191744101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:25,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660196839] [2021-06-12 22:18:25,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:25,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:25,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:25,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:25,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:25,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660196839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:25,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:25,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:18:25,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643789813] [2021-06-12 22:18:25,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:25,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:25,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:25,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:25,382 INFO L87 Difference]: Start difference. First operand 2898 states and 10100 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:18:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:26,033 INFO L93 Difference]: Finished difference Result 4846 states and 15131 transitions. [2021-06-12 22:18:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:18:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-12 22:18:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:26,040 INFO L225 Difference]: With dead ends: 4846 [2021-06-12 22:18:26,040 INFO L226 Difference]: Without dead ends: 4820 [2021-06-12 22:18:26,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:18:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-06-12 22:18:26,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 2913. [2021-06-12 22:18:26,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4903846153846154) internal successors, (10164), 2912 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10164 transitions. [2021-06-12 22:18:26,084 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10164 transitions. Word has length 28 [2021-06-12 22:18:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:26,084 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10164 transitions. [2021-06-12 22:18:26,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:18:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10164 transitions. [2021-06-12 22:18:26,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:26,087 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:26,087 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:26,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3516,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:26,288 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:26,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:26,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1676978985, now seen corresponding path program 65 times [2021-06-12 22:18:26,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:26,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650661203] [2021-06-12 22:18:26,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:26,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:26,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650661203] [2021-06-12 22:18:26,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650661203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:26,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310748764] [2021-06-12 22:18:26,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:26,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:18:26,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:26,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310748764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:26,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:26,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:18:26,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134310518] [2021-06-12 22:18:26,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:26,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:26,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:26,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:26,437 INFO L87 Difference]: Start difference. First operand 2913 states and 10164 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:18:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:27,086 INFO L93 Difference]: Finished difference Result 4838 states and 15131 transitions. [2021-06-12 22:18:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 22:18:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-12 22:18:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:27,092 INFO L225 Difference]: With dead ends: 4838 [2021-06-12 22:18:27,092 INFO L226 Difference]: Without dead ends: 4823 [2021-06-12 22:18:27,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 423.6ms TimeCoverageRelationStatistics Valid=624, Invalid=1728, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:18:27,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2021-06-12 22:18:27,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 2913. [2021-06-12 22:18:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.48592032967033) internal successors, (10151), 2912 states have internal predecessors, (10151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:27,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10151 transitions. [2021-06-12 22:18:27,136 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10151 transitions. Word has length 28 [2021-06-12 22:18:27,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:27,136 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10151 transitions. [2021-06-12 22:18:27,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:18:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10151 transitions. [2021-06-12 22:18:27,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:27,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:27,139 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:27,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3517 [2021-06-12 22:18:27,339 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:27,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1569189389, now seen corresponding path program 66 times [2021-06-12 22:18:27,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:27,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376185840] [2021-06-12 22:18:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:27,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:27,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376185840] [2021-06-12 22:18:27,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376185840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:27,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428628839] [2021-06-12 22:18:27,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:27,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:18:27,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:27,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428628839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:27,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:27,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:18:27,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655439006] [2021-06-12 22:18:27,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:18:27,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:27,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:18:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:18:27,483 INFO L87 Difference]: Start difference. First operand 2913 states and 10151 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:18:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:27,984 INFO L93 Difference]: Finished difference Result 5599 states and 17892 transitions. [2021-06-12 22:18:27,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:18:27,984 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:18:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:27,991 INFO L225 Difference]: With dead ends: 5599 [2021-06-12 22:18:27,991 INFO L226 Difference]: Without dead ends: 5552 [2021-06-12 22:18:27,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:18:27,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5552 states. [2021-06-12 22:18:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5552 to 3063. [2021-06-12 22:18:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 3.5303723056825604) internal successors, (10810), 3062 states have internal predecessors, (10810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 10810 transitions. [2021-06-12 22:18:28,064 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 10810 transitions. Word has length 28 [2021-06-12 22:18:28,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:28,064 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 10810 transitions. [2021-06-12 22:18:28,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:18:28,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 10810 transitions. [2021-06-12 22:18:28,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:28,068 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:28,068 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:28,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3518 [2021-06-12 22:18:28,268 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:28,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:28,268 INFO L82 PathProgramCache]: Analyzing trace with hash -641999155, now seen corresponding path program 67 times [2021-06-12 22:18:28,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:28,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97413453] [2021-06-12 22:18:28,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:28,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:28,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97413453] [2021-06-12 22:18:28,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97413453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:28,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775249729] [2021-06-12 22:18:28,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:18:28,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:28,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775249729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:28,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:28,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 22:18:28,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636866226] [2021-06-12 22:18:28,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:18:28,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:28,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:18:28,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:18:28,370 INFO L87 Difference]: Start difference. First operand 3063 states and 10810 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:28,519 INFO L93 Difference]: Finished difference Result 4390 states and 14427 transitions. [2021-06-12 22:18:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:18:28,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:28,524 INFO L225 Difference]: With dead ends: 4390 [2021-06-12 22:18:28,524 INFO L226 Difference]: Without dead ends: 4390 [2021-06-12 22:18:28,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=132, Invalid=210, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:18:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4390 states. [2021-06-12 22:18:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4390 to 2947. [2021-06-12 22:18:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2947 states, 2946 states have (on average 3.5020366598778003) internal successors, (10317), 2946 states have internal predecessors, (10317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:28,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2947 states to 2947 states and 10317 transitions. [2021-06-12 22:18:28,563 INFO L78 Accepts]: Start accepts. Automaton has 2947 states and 10317 transitions. Word has length 28 [2021-06-12 22:18:28,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:28,563 INFO L482 AbstractCegarLoop]: Abstraction has 2947 states and 10317 transitions. [2021-06-12 22:18:28,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 2947 states and 10317 transitions. [2021-06-12 22:18:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:28,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:28,566 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:28,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3519,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:28,767 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1988680721, now seen corresponding path program 68 times [2021-06-12 22:18:28,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:28,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640273942] [2021-06-12 22:18:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:28,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:28,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640273942] [2021-06-12 22:18:28,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640273942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:28,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780276975] [2021-06-12 22:18:28,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:28,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:28,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:28,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780276975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:28,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:28,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:18:28,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867879925] [2021-06-12 22:18:28,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:18:28,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:28,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:18:28,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:18:28,896 INFO L87 Difference]: Start difference. First operand 2947 states and 10317 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:29,573 INFO L93 Difference]: Finished difference Result 6294 states and 19912 transitions. [2021-06-12 22:18:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:18:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:29,581 INFO L225 Difference]: With dead ends: 6294 [2021-06-12 22:18:29,581 INFO L226 Difference]: Without dead ends: 6294 [2021-06-12 22:18:29,582 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=552, Invalid=1800, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:18:29,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2021-06-12 22:18:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 2965. [2021-06-12 22:18:29,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.5020242914979756) internal successors, (10380), 2964 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:29,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 10380 transitions. [2021-06-12 22:18:29,635 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 10380 transitions. Word has length 28 [2021-06-12 22:18:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:29,635 INFO L482 AbstractCegarLoop]: Abstraction has 2965 states and 10380 transitions. [2021-06-12 22:18:29,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 10380 transitions. [2021-06-12 22:18:29,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:29,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:29,638 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:29,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3520,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:29,839 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:29,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1203766627, now seen corresponding path program 69 times [2021-06-12 22:18:29,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:29,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275294635] [2021-06-12 22:18:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:29,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:29,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275294635] [2021-06-12 22:18:29,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275294635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:29,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698123711] [2021-06-12 22:18:29,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:29,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:18:29,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:29,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:29,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:29,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698123711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:29,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:29,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:18:29,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56998443] [2021-06-12 22:18:29,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:18:29,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:29,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:18:29,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:18:29,970 INFO L87 Difference]: Start difference. First operand 2965 states and 10380 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:30,701 INFO L93 Difference]: Finished difference Result 6549 states and 20685 transitions. [2021-06-12 22:18:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 22:18:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:30,710 INFO L225 Difference]: With dead ends: 6549 [2021-06-12 22:18:30,710 INFO L226 Difference]: Without dead ends: 6549 [2021-06-12 22:18:30,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 404.1ms TimeCoverageRelationStatistics Valid=634, Invalid=2336, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 22:18:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6549 states. [2021-06-12 22:18:30,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6549 to 3059. [2021-06-12 22:18:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3059 states, 3058 states have (on average 3.4947678221059517) internal successors, (10687), 3058 states have internal predecessors, (10687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3059 states to 3059 states and 10687 transitions. [2021-06-12 22:18:30,768 INFO L78 Accepts]: Start accepts. Automaton has 3059 states and 10687 transitions. Word has length 28 [2021-06-12 22:18:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:30,768 INFO L482 AbstractCegarLoop]: Abstraction has 3059 states and 10687 transitions. [2021-06-12 22:18:30,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:30,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3059 states and 10687 transitions. [2021-06-12 22:18:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:30,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:30,771 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:30,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3521,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:30,971 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:30,972 INFO L82 PathProgramCache]: Analyzing trace with hash 2008178013, now seen corresponding path program 70 times [2021-06-12 22:18:30,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:30,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923799204] [2021-06-12 22:18:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:30,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:31,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923799204] [2021-06-12 22:18:31,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923799204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:31,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451780324] [2021-06-12 22:18:31,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:31,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:31,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:31,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:31,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:31,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451780324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:31,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:31,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:18:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775819559] [2021-06-12 22:18:31,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:18:31,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:31,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:18:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:18:31,092 INFO L87 Difference]: Start difference. First operand 3059 states and 10687 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:18:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:31,669 INFO L93 Difference]: Finished difference Result 6709 states and 21196 transitions. [2021-06-12 22:18:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 22:18:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:18:31,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:31,678 INFO L225 Difference]: With dead ends: 6709 [2021-06-12 22:18:31,678 INFO L226 Difference]: Without dead ends: 6673 [2021-06-12 22:18:31,678 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 334.6ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:18:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6673 states. [2021-06-12 22:18:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6673 to 3461. [2021-06-12 22:18:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3461 states, 3460 states have (on average 3.5245664739884393) internal successors, (12195), 3460 states have internal predecessors, (12195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:31,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3461 states to 3461 states and 12195 transitions. [2021-06-12 22:18:31,742 INFO L78 Accepts]: Start accepts. Automaton has 3461 states and 12195 transitions. Word has length 28 [2021-06-12 22:18:31,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:31,742 INFO L482 AbstractCegarLoop]: Abstraction has 3461 states and 12195 transitions. [2021-06-12 22:18:31,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:18:31,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3461 states and 12195 transitions. [2021-06-12 22:18:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:31,746 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:31,746 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:31,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3522 [2021-06-12 22:18:31,946 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:31,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:31,947 INFO L82 PathProgramCache]: Analyzing trace with hash -815711165, now seen corresponding path program 71 times [2021-06-12 22:18:31,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:31,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55581157] [2021-06-12 22:18:31,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:31,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:31,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55581157] [2021-06-12 22:18:31,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55581157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:31,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306293137] [2021-06-12 22:18:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:32,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:18:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:32,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:32,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306293137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:32,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:32,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:18:32,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658328338] [2021-06-12 22:18:32,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:18:32,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:32,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:18:32,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:18:32,071 INFO L87 Difference]: Start difference. First operand 3461 states and 12195 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:18:32,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:32,635 INFO L93 Difference]: Finished difference Result 6846 states and 21557 transitions. [2021-06-12 22:18:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:18:32,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:18:32,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:32,643 INFO L225 Difference]: With dead ends: 6846 [2021-06-12 22:18:32,643 INFO L226 Difference]: Without dead ends: 6846 [2021-06-12 22:18:32,644 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 339.7ms TimeCoverageRelationStatistics Valid=543, Invalid=1527, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:18:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2021-06-12 22:18:32,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 3175. [2021-06-12 22:18:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 3.484247006931317) internal successors, (11059), 3174 states have internal predecessors, (11059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 11059 transitions. [2021-06-12 22:18:32,707 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 11059 transitions. Word has length 28 [2021-06-12 22:18:32,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:32,707 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 11059 transitions. [2021-06-12 22:18:32,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:18:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 11059 transitions. [2021-06-12 22:18:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:32,710 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:32,711 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:32,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3523,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:32,911 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:32,911 INFO L82 PathProgramCache]: Analyzing trace with hash -257646883, now seen corresponding path program 72 times [2021-06-12 22:18:32,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:32,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389694201] [2021-06-12 22:18:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:32,943 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:32,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:32,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389694201] [2021-06-12 22:18:32,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389694201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:32,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332310766] [2021-06-12 22:18:32,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:32,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:18:32,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:32,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:33,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332310766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:33,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:33,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:18:33,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450190747] [2021-06-12 22:18:33,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:18:33,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:33,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:18:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:18:33,035 INFO L87 Difference]: Start difference. First operand 3175 states and 11059 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:33,701 INFO L93 Difference]: Finished difference Result 6061 states and 19490 transitions. [2021-06-12 22:18:33,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:18:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:33,709 INFO L225 Difference]: With dead ends: 6061 [2021-06-12 22:18:33,709 INFO L226 Difference]: Without dead ends: 6057 [2021-06-12 22:18:33,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=600, Invalid=2052, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:18:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6057 states. [2021-06-12 22:18:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6057 to 2935. [2021-06-12 22:18:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.507498295841854) internal successors, (10291), 2934 states have internal predecessors, (10291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 10291 transitions. [2021-06-12 22:18:33,758 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 10291 transitions. Word has length 28 [2021-06-12 22:18:33,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:33,758 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 10291 transitions. [2021-06-12 22:18:33,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:33,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 10291 transitions. [2021-06-12 22:18:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:33,761 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:33,761 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:33,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3524,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:33,962 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:33,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:33,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1520596959, now seen corresponding path program 73 times [2021-06-12 22:18:33,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:33,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527250670] [2021-06-12 22:18:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:33,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527250670] [2021-06-12 22:18:33,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527250670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:33,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228312520] [2021-06-12 22:18:33,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:34,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:34,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228312520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:34,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:34,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:18:34,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733535977] [2021-06-12 22:18:34,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:34,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:34,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:34,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:34,108 INFO L87 Difference]: Start difference. First operand 2935 states and 10291 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:35,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:35,092 INFO L93 Difference]: Finished difference Result 9324 states and 30354 transitions. [2021-06-12 22:18:35,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:18:35,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:35,105 INFO L225 Difference]: With dead ends: 9324 [2021-06-12 22:18:35,105 INFO L226 Difference]: Without dead ends: 9324 [2021-06-12 22:18:35,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 569.2ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:18:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2021-06-12 22:18:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 3117. [2021-06-12 22:18:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3116 states have (on average 3.5805519897304237) internal successors, (11157), 3116 states have internal predecessors, (11157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 11157 transitions. [2021-06-12 22:18:35,180 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 11157 transitions. Word has length 28 [2021-06-12 22:18:35,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:35,180 INFO L482 AbstractCegarLoop]: Abstraction has 3117 states and 11157 transitions. [2021-06-12 22:18:35,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:35,180 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 11157 transitions. [2021-06-12 22:18:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:35,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:35,183 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:35,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3525,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:35,384 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:35,384 INFO L82 PathProgramCache]: Analyzing trace with hash 8307685, now seen corresponding path program 74 times [2021-06-12 22:18:35,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:35,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720546467] [2021-06-12 22:18:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:35,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:35,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720546467] [2021-06-12 22:18:35,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720546467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:35,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394109814] [2021-06-12 22:18:35,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:35,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:35,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:35,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:35,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:35,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394109814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:35,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:35,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:18:35,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122416716] [2021-06-12 22:18:35,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:35,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:35,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:35,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:35,530 INFO L87 Difference]: Start difference. First operand 3117 states and 11157 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:36,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:36,484 INFO L93 Difference]: Finished difference Result 9147 states and 29872 transitions. [2021-06-12 22:18:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:18:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:36,497 INFO L225 Difference]: With dead ends: 9147 [2021-06-12 22:18:36,497 INFO L226 Difference]: Without dead ends: 9147 [2021-06-12 22:18:36,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 568.9ms TimeCoverageRelationStatistics Valid=968, Invalid=3588, Unknown=0, NotChecked=0, Total=4556 [2021-06-12 22:18:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9147 states. [2021-06-12 22:18:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9147 to 3083. [2021-06-12 22:18:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3083 states, 3082 states have (on average 3.562621674237508) internal successors, (10980), 3082 states have internal predecessors, (10980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3083 states to 3083 states and 10980 transitions. [2021-06-12 22:18:36,576 INFO L78 Accepts]: Start accepts. Automaton has 3083 states and 10980 transitions. Word has length 28 [2021-06-12 22:18:36,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:36,576 INFO L482 AbstractCegarLoop]: Abstraction has 3083 states and 10980 transitions. [2021-06-12 22:18:36,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3083 states and 10980 transitions. [2021-06-12 22:18:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:36,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:36,580 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:36,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3526 [2021-06-12 22:18:36,780 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2125990737, now seen corresponding path program 75 times [2021-06-12 22:18:36,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:36,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524459827] [2021-06-12 22:18:36,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:36,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:36,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524459827] [2021-06-12 22:18:36,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524459827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:36,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970607652] [2021-06-12 22:18:36,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:36,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:18:36,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:36,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:36,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:36,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970607652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:36,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:36,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:18:36,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075414987] [2021-06-12 22:18:36,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:36,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:36,937 INFO L87 Difference]: Start difference. First operand 3083 states and 10980 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:18:37,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:37,798 INFO L93 Difference]: Finished difference Result 8583 states and 27105 transitions. [2021-06-12 22:18:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:18:37,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-12 22:18:37,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:37,810 INFO L225 Difference]: With dead ends: 8583 [2021-06-12 22:18:37,810 INFO L226 Difference]: Without dead ends: 8583 [2021-06-12 22:18:37,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=821, Invalid=3085, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:18:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8583 states. [2021-06-12 22:18:37,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8583 to 3103. [2021-06-12 22:18:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3102 states have (on average 3.5660863958736297) internal successors, (11062), 3102 states have internal predecessors, (11062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 11062 transitions. [2021-06-12 22:18:37,896 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 11062 transitions. Word has length 28 [2021-06-12 22:18:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:37,896 INFO L482 AbstractCegarLoop]: Abstraction has 3103 states and 11062 transitions. [2021-06-12 22:18:37,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:18:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 11062 transitions. [2021-06-12 22:18:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:37,899 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:37,899 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:38,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3527 [2021-06-12 22:18:38,100 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:38,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:38,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1053673763, now seen corresponding path program 76 times [2021-06-12 22:18:38,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:38,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892196227] [2021-06-12 22:18:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:38,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:38,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892196227] [2021-06-12 22:18:38,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892196227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:38,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824238689] [2021-06-12 22:18:38,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:38,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:38,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:38,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:38,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:38,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824238689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:38,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:38,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:18:38,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856912839] [2021-06-12 22:18:38,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:38,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:38,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:38,232 INFO L87 Difference]: Start difference. First operand 3103 states and 11062 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:18:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:39,057 INFO L93 Difference]: Finished difference Result 8084 states and 25895 transitions. [2021-06-12 22:18:39,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:18:39,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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 28 [2021-06-12 22:18:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:39,069 INFO L225 Difference]: With dead ends: 8084 [2021-06-12 22:18:39,069 INFO L226 Difference]: Without dead ends: 8076 [2021-06-12 22:18:39,069 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 449.0ms TimeCoverageRelationStatistics Valid=776, Invalid=2764, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:18:39,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-12 22:18:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 3085. [2021-06-12 22:18:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3085 states, 3084 states have (on average 3.5619325551232164) internal successors, (10985), 3084 states have internal predecessors, (10985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3085 states to 3085 states and 10985 transitions. [2021-06-12 22:18:39,153 INFO L78 Accepts]: Start accepts. Automaton has 3085 states and 10985 transitions. Word has length 28 [2021-06-12 22:18:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:39,153 INFO L482 AbstractCegarLoop]: Abstraction has 3085 states and 10985 transitions. [2021-06-12 22:18:39,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 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) [2021-06-12 22:18:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3085 states and 10985 transitions. [2021-06-12 22:18:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:39,157 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:39,157 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:39,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3528,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:39,361 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1235475809, now seen corresponding path program 77 times [2021-06-12 22:18:39,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:39,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658090222] [2021-06-12 22:18:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:39,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:39,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658090222] [2021-06-12 22:18:39,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658090222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:39,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624309411] [2021-06-12 22:18:39,397 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:39,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:18:39,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:39,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:39,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624309411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:39,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:39,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:18:39,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444858926] [2021-06-12 22:18:39,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:39,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:39,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:39,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:39,512 INFO L87 Difference]: Start difference. First operand 3085 states and 10985 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-06-12 22:18:40,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:40,426 INFO L93 Difference]: Finished difference Result 8010 states and 25668 transitions. [2021-06-12 22:18:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-12 22:18:40,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-06-12 22:18:40,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:40,437 INFO L225 Difference]: With dead ends: 8010 [2021-06-12 22:18:40,437 INFO L226 Difference]: Without dead ends: 8010 [2021-06-12 22:18:40,437 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 501.9ms TimeCoverageRelationStatistics Valid=820, Invalid=2962, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:18:40,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8010 states. [2021-06-12 22:18:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8010 to 3101. [2021-06-12 22:18:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3100 states have (on average 3.5641935483870966) internal successors, (11049), 3100 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:40,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 11049 transitions. [2021-06-12 22:18:40,500 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 11049 transitions. Word has length 28 [2021-06-12 22:18:40,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:40,500 INFO L482 AbstractCegarLoop]: Abstraction has 3101 states and 11049 transitions. [2021-06-12 22:18:40,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-06-12 22:18:40,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 11049 transitions. [2021-06-12 22:18:40,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:40,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:40,504 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:40,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3529 [2021-06-12 22:18:40,704 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash 180098415, now seen corresponding path program 78 times [2021-06-12 22:18:40,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:40,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358965743] [2021-06-12 22:18:40,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:40,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:40,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358965743] [2021-06-12 22:18:40,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358965743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:40,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561016613] [2021-06-12 22:18:40,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:40,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:18:40,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:40,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:40,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:40,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561016613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:40,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:40,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 22:18:40,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749263873] [2021-06-12 22:18:40,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:40,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:40,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:40,849 INFO L87 Difference]: Start difference. First operand 3101 states and 11049 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-06-12 22:18:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:41,748 INFO L93 Difference]: Finished difference Result 7678 states and 24884 transitions. [2021-06-12 22:18:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:18:41,748 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-06-12 22:18:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:41,758 INFO L225 Difference]: With dead ends: 7678 [2021-06-12 22:18:41,758 INFO L226 Difference]: Without dead ends: 7670 [2021-06-12 22:18:41,758 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=800, Invalid=2740, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:18:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7670 states. [2021-06-12 22:18:41,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7670 to 2858. [2021-06-12 22:18:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 3.4816240812040604) internal successors, (9947), 2857 states have internal predecessors, (9947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 9947 transitions. [2021-06-12 22:18:41,818 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 9947 transitions. Word has length 28 [2021-06-12 22:18:41,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:41,818 INFO L482 AbstractCegarLoop]: Abstraction has 2858 states and 9947 transitions. [2021-06-12 22:18:41,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-06-12 22:18:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 9947 transitions. [2021-06-12 22:18:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:41,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:41,821 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:42,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3530,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:42,022 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1618231897, now seen corresponding path program 79 times [2021-06-12 22:18:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:42,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66044277] [2021-06-12 22:18:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:42,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:42,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66044277] [2021-06-12 22:18:42,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66044277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:42,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072306965] [2021-06-12 22:18:42,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:42,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:42,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:42,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072306965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:42,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:42,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:18:42,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258557302] [2021-06-12 22:18:42,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:18:42,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:18:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:18:42,168 INFO L87 Difference]: Start difference. First operand 2858 states and 9947 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:18:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:42,961 INFO L93 Difference]: Finished difference Result 5875 states and 18762 transitions. [2021-06-12 22:18:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:18:42,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-12 22:18:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:42,970 INFO L225 Difference]: With dead ends: 5875 [2021-06-12 22:18:42,970 INFO L226 Difference]: Without dead ends: 5875 [2021-06-12 22:18:42,970 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 489.1ms TimeCoverageRelationStatistics Valid=709, Invalid=2713, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:18:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5875 states. [2021-06-12 22:18:43,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5875 to 2870. [2021-06-12 22:18:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2870 states, 2869 states have (on average 3.480306727082607) internal successors, (9985), 2869 states have internal predecessors, (9985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2870 states to 2870 states and 9985 transitions. [2021-06-12 22:18:43,031 INFO L78 Accepts]: Start accepts. Automaton has 2870 states and 9985 transitions. Word has length 28 [2021-06-12 22:18:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:43,031 INFO L482 AbstractCegarLoop]: Abstraction has 2870 states and 9985 transitions. [2021-06-12 22:18:43,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:18:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2870 states and 9985 transitions. [2021-06-12 22:18:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:43,034 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:43,034 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:43,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3531,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:43,235 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1792117207, now seen corresponding path program 80 times [2021-06-12 22:18:43,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:43,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615260952] [2021-06-12 22:18:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:43,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:43,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615260952] [2021-06-12 22:18:43,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615260952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:43,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261611747] [2021-06-12 22:18:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:43,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:43,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:43,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:43,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:43,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261611747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:43,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:43,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:18:43,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143866699] [2021-06-12 22:18:43,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:43,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:43,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:43,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:43,395 INFO L87 Difference]: Start difference. First operand 2870 states and 9985 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:18:44,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:44,453 INFO L93 Difference]: Finished difference Result 6654 states and 20757 transitions. [2021-06-12 22:18:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:18:44,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-06-12 22:18:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:44,462 INFO L225 Difference]: With dead ends: 6654 [2021-06-12 22:18:44,462 INFO L226 Difference]: Without dead ends: 6654 [2021-06-12 22:18:44,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 643.5ms TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 22:18:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6654 states. [2021-06-12 22:18:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6654 to 2936. [2021-06-12 22:18:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 3.475979557069847) internal successors, (10202), 2935 states have internal predecessors, (10202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 10202 transitions. [2021-06-12 22:18:44,536 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 10202 transitions. Word has length 28 [2021-06-12 22:18:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:44,536 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 10202 transitions. [2021-06-12 22:18:44,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:18:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 10202 transitions. [2021-06-12 22:18:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:44,539 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:44,539 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:44,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:44,740 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:44,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:44,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1447472695, now seen corresponding path program 81 times [2021-06-12 22:18:44,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:44,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748213348] [2021-06-12 22:18:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:44,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:44,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748213348] [2021-06-12 22:18:44,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748213348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:44,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523091301] [2021-06-12 22:18:44,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:44,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:18:44,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:44,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:44,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:44,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523091301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:44,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:44,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:18:44,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512433159] [2021-06-12 22:18:44,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:44,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:44,905 INFO L87 Difference]: Start difference. First operand 2936 states and 10202 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:18:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:45,849 INFO L93 Difference]: Finished difference Result 6217 states and 19611 transitions. [2021-06-12 22:18:45,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 22:18:45,849 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-06-12 22:18:45,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:45,858 INFO L225 Difference]: With dead ends: 6217 [2021-06-12 22:18:45,859 INFO L226 Difference]: Without dead ends: 6213 [2021-06-12 22:18:45,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=914, Invalid=3508, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:18:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2021-06-12 22:18:45,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 2862. [2021-06-12 22:18:45,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.471513456833275) internal successors, (9932), 2861 states have internal predecessors, (9932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9932 transitions. [2021-06-12 22:18:45,938 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9932 transitions. Word has length 28 [2021-06-12 22:18:45,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:45,939 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9932 transitions. [2021-06-12 22:18:45,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:18:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9932 transitions. [2021-06-12 22:18:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:45,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:45,942 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:46,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3533,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:46,142 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:46,142 INFO L82 PathProgramCache]: Analyzing trace with hash 193360559, now seen corresponding path program 68 times [2021-06-12 22:18:46,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:46,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880455507] [2021-06-12 22:18:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:46,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:46,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880455507] [2021-06-12 22:18:46,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880455507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:46,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988883512] [2021-06-12 22:18:46,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:46,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:46,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:46,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:46,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:46,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988883512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:46,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:46,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:18:46,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128525017] [2021-06-12 22:18:46,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:46,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:46,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:46,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:46,282 INFO L87 Difference]: Start difference. First operand 2862 states and 9932 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:46,817 INFO L93 Difference]: Finished difference Result 5353 states and 17165 transitions. [2021-06-12 22:18:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:18:46,817 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:46,825 INFO L225 Difference]: With dead ends: 5353 [2021-06-12 22:18:46,825 INFO L226 Difference]: Without dead ends: 5353 [2021-06-12 22:18:46,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:18:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-12 22:18:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 2862. [2021-06-12 22:18:46,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.473610625655365) internal successors, (9938), 2861 states have internal predecessors, (9938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 9938 transitions. [2021-06-12 22:18:46,869 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 9938 transitions. Word has length 28 [2021-06-12 22:18:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:46,869 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 9938 transitions. [2021-06-12 22:18:46,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 9938 transitions. [2021-06-12 22:18:46,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:46,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:46,872 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:47,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3534 [2021-06-12 22:18:47,072 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:47,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1418439203, now seen corresponding path program 69 times [2021-06-12 22:18:47,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:47,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413809137] [2021-06-12 22:18:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:47,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:47,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413809137] [2021-06-12 22:18:47,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413809137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:47,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766757594] [2021-06-12 22:18:47,115 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:47,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:18:47,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:47,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766757594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:47,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:47,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:18:47,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951021790] [2021-06-12 22:18:47,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:47,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:47,212 INFO L87 Difference]: Start difference. First operand 2862 states and 9938 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:47,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:47,899 INFO L93 Difference]: Finished difference Result 5672 states and 18078 transitions. [2021-06-12 22:18:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:18:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:47,907 INFO L225 Difference]: With dead ends: 5672 [2021-06-12 22:18:47,907 INFO L226 Difference]: Without dead ends: 5672 [2021-06-12 22:18:47,907 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=638, Invalid=2118, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 22:18:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5672 states. [2021-06-12 22:18:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5672 to 2853. [2021-06-12 22:18:47,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 3.473702664796634) internal successors, (9907), 2852 states have internal predecessors, (9907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 9907 transitions. [2021-06-12 22:18:47,955 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 9907 transitions. Word has length 28 [2021-06-12 22:18:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:47,955 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 9907 transitions. [2021-06-12 22:18:47,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 9907 transitions. [2021-06-12 22:18:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:47,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:47,958 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:48,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3535,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:48,159 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1649978851, now seen corresponding path program 70 times [2021-06-12 22:18:48,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:48,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747899360] [2021-06-12 22:18:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:48,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:48,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747899360] [2021-06-12 22:18:48,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747899360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:48,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828556208] [2021-06-12 22:18:48,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:48,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:48,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:48,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:48,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828556208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:48,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:48,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:18:48,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858367418] [2021-06-12 22:18:48,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:48,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:48,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:48,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:48,294 INFO L87 Difference]: Start difference. First operand 2853 states and 9907 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:49,050 INFO L93 Difference]: Finished difference Result 6160 states and 19384 transitions. [2021-06-12 22:18:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-12 22:18:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:49,059 INFO L225 Difference]: With dead ends: 6160 [2021-06-12 22:18:49,060 INFO L226 Difference]: Without dead ends: 6160 [2021-06-12 22:18:49,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=777, Invalid=3005, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:18:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-12 22:18:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 2913. [2021-06-12 22:18:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.4701236263736264) internal successors, (10105), 2912 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10105 transitions. [2021-06-12 22:18:49,120 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10105 transitions. Word has length 28 [2021-06-12 22:18:49,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:49,120 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 10105 transitions. [2021-06-12 22:18:49,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10105 transitions. [2021-06-12 22:18:49,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:49,124 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:49,124 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:49,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3536 [2021-06-12 22:18:49,324 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:49,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:49,324 INFO L82 PathProgramCache]: Analyzing trace with hash 707808605, now seen corresponding path program 71 times [2021-06-12 22:18:49,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:49,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562451613] [2021-06-12 22:18:49,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:49,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:49,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562451613] [2021-06-12 22:18:49,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562451613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:49,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872916287] [2021-06-12 22:18:49,357 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:49,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:18:49,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:49,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:49,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:49,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872916287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:49,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:49,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 22:18:49,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293049256] [2021-06-12 22:18:49,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:18:49,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:49,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:18:49,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:18:49,485 INFO L87 Difference]: Start difference. First operand 2913 states and 10105 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:49,986 INFO L93 Difference]: Finished difference Result 6832 states and 22884 transitions. [2021-06-12 22:18:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:18:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:49,995 INFO L225 Difference]: With dead ends: 6832 [2021-06-12 22:18:49,995 INFO L226 Difference]: Without dead ends: 6832 [2021-06-12 22:18:49,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:18:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2021-06-12 22:18:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 4173. [2021-06-12 22:18:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4173 states, 4172 states have (on average 3.5884467881112174) internal successors, (14971), 4172 states have internal predecessors, (14971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4173 states to 4173 states and 14971 transitions. [2021-06-12 22:18:50,068 INFO L78 Accepts]: Start accepts. Automaton has 4173 states and 14971 transitions. Word has length 28 [2021-06-12 22:18:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:50,068 INFO L482 AbstractCegarLoop]: Abstraction has 4173 states and 14971 transitions. [2021-06-12 22:18:50,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4173 states and 14971 transitions. [2021-06-12 22:18:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:50,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:50,073 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:50,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3537,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:50,273 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash -703859107, now seen corresponding path program 72 times [2021-06-12 22:18:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:50,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477100190] [2021-06-12 22:18:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:50,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:50,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477100190] [2021-06-12 22:18:50,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477100190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:50,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781350327] [2021-06-12 22:18:50,311 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:50,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:18:50,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:50,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:50,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:50,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781350327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:50,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:50,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 22:18:50,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166464001] [2021-06-12 22:18:50,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:50,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:50,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:50,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:50,403 INFO L87 Difference]: Start difference. First operand 4173 states and 14971 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:51,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:51,157 INFO L93 Difference]: Finished difference Result 7512 states and 25338 transitions. [2021-06-12 22:18:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 22:18:51,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:51,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:51,168 INFO L225 Difference]: With dead ends: 7512 [2021-06-12 22:18:51,168 INFO L226 Difference]: Without dead ends: 7508 [2021-06-12 22:18:51,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:18:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7508 states. [2021-06-12 22:18:51,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7508 to 4065. [2021-06-12 22:18:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4065 states, 4064 states have (on average 3.597194881889764) internal successors, (14619), 4064 states have internal predecessors, (14619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4065 states to 4065 states and 14619 transitions. [2021-06-12 22:18:51,241 INFO L78 Accepts]: Start accepts. Automaton has 4065 states and 14619 transitions. Word has length 28 [2021-06-12 22:18:51,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:51,241 INFO L482 AbstractCegarLoop]: Abstraction has 4065 states and 14619 transitions. [2021-06-12 22:18:51,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4065 states and 14619 transitions. [2021-06-12 22:18:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:51,245 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:51,245 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:51,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3538,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:51,446 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:51,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:51,446 INFO L82 PathProgramCache]: Analyzing trace with hash 325457475, now seen corresponding path program 82 times [2021-06-12 22:18:51,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:51,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375821314] [2021-06-12 22:18:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:51,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:51,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375821314] [2021-06-12 22:18:51,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375821314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:51,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035065074] [2021-06-12 22:18:51,473 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:51,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:51,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:51,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:51,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:51,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035065074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:51,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:51,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:18:51,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817116259] [2021-06-12 22:18:51,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:51,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:51,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:51,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:51,576 INFO L87 Difference]: Start difference. First operand 4065 states and 14619 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:52,365 INFO L93 Difference]: Finished difference Result 8298 states and 27746 transitions. [2021-06-12 22:18:52,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:18:52,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:52,377 INFO L225 Difference]: With dead ends: 8298 [2021-06-12 22:18:52,378 INFO L226 Difference]: Without dead ends: 8289 [2021-06-12 22:18:52,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:18:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8289 states. [2021-06-12 22:18:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8289 to 4502. [2021-06-12 22:18:52,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 3.688735836480782) internal successors, (16603), 4501 states have internal predecessors, (16603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:52,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 16603 transitions. [2021-06-12 22:18:52,478 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 16603 transitions. Word has length 28 [2021-06-12 22:18:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:52,478 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 16603 transitions. [2021-06-12 22:18:52,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 16603 transitions. [2021-06-12 22:18:52,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:52,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:52,484 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:52,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3539 [2021-06-12 22:18:52,684 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:52,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:52,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1928168421, now seen corresponding path program 83 times [2021-06-12 22:18:52,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:52,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362972858] [2021-06-12 22:18:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:52,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:52,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362972858] [2021-06-12 22:18:52,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362972858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:52,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269698956] [2021-06-12 22:18:52,711 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:52,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:18:52,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:52,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:52,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:52,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269698956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:52,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:52,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:18:52,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605993228] [2021-06-12 22:18:52,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:18:52,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:18:52,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:18:52,828 INFO L87 Difference]: Start difference. First operand 4502 states and 16603 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:53,601 INFO L93 Difference]: Finished difference Result 8567 states and 28576 transitions. [2021-06-12 22:18:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 22:18:53,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:53,613 INFO L225 Difference]: With dead ends: 8567 [2021-06-12 22:18:53,613 INFO L226 Difference]: Without dead ends: 8567 [2021-06-12 22:18:53,614 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=674, Invalid=1876, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:18:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8567 states. [2021-06-12 22:18:53,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8567 to 4520. [2021-06-12 22:18:53,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4520 states, 4519 states have (on average 3.677362248285019) internal successors, (16618), 4519 states have internal predecessors, (16618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:53,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4520 states to 4520 states and 16618 transitions. [2021-06-12 22:18:53,699 INFO L78 Accepts]: Start accepts. Automaton has 4520 states and 16618 transitions. Word has length 28 [2021-06-12 22:18:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:53,699 INFO L482 AbstractCegarLoop]: Abstraction has 4520 states and 16618 transitions. [2021-06-12 22:18:53,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:53,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4520 states and 16618 transitions. [2021-06-12 22:18:53,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:53,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:53,704 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:53,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3540 [2021-06-12 22:18:53,904 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:53,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:53,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1163392585, now seen corresponding path program 84 times [2021-06-12 22:18:53,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:53,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046931419] [2021-06-12 22:18:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:53,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:53,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046931419] [2021-06-12 22:18:53,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046931419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:53,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130513093] [2021-06-12 22:18:53,935 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:53,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:18:53,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:54,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130513093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:54,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:54,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:18:54,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365139110] [2021-06-12 22:18:54,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:18:54,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:54,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:18:54,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:18:54,039 INFO L87 Difference]: Start difference. First operand 4520 states and 16618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:54,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:54,426 INFO L93 Difference]: Finished difference Result 8001 states and 28114 transitions. [2021-06-12 22:18:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:18:54,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:54,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:54,438 INFO L225 Difference]: With dead ends: 8001 [2021-06-12 22:18:54,438 INFO L226 Difference]: Without dead ends: 7918 [2021-06-12 22:18:54,438 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:18:54,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7918 states. [2021-06-12 22:18:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7918 to 5964. [2021-06-12 22:18:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5964 states, 5963 states have (on average 3.7450947509642796) internal successors, (22332), 5963 states have internal predecessors, (22332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:54,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5964 states to 5964 states and 22332 transitions. [2021-06-12 22:18:54,531 INFO L78 Accepts]: Start accepts. Automaton has 5964 states and 22332 transitions. Word has length 28 [2021-06-12 22:18:54,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:54,531 INFO L482 AbstractCegarLoop]: Abstraction has 5964 states and 22332 transitions. [2021-06-12 22:18:54,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 5964 states and 22332 transitions. [2021-06-12 22:18:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:54,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:54,538 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:54,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3541,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:54,739 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1923559731, now seen corresponding path program 85 times [2021-06-12 22:18:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:54,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135967475] [2021-06-12 22:18:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:54,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:54,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135967475] [2021-06-12 22:18:54,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135967475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:54,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425021379] [2021-06-12 22:18:54,765 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:54,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:18:54,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:54,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425021379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:54,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:54,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:18:54,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963243447] [2021-06-12 22:18:54,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:18:54,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:54,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:18:54,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:18:54,841 INFO L87 Difference]: Start difference. First operand 5964 states and 22332 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:55,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:55,013 INFO L93 Difference]: Finished difference Result 8265 states and 28982 transitions. [2021-06-12 22:18:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:18:55,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:55,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:55,025 INFO L225 Difference]: With dead ends: 8265 [2021-06-12 22:18:55,026 INFO L226 Difference]: Without dead ends: 8265 [2021-06-12 22:18:55,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:18:55,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8265 states. [2021-06-12 22:18:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8265 to 6071. [2021-06-12 22:18:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6071 states, 6070 states have (on average 3.7255354200988466) internal successors, (22614), 6070 states have internal predecessors, (22614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6071 states to 6071 states and 22614 transitions. [2021-06-12 22:18:55,151 INFO L78 Accepts]: Start accepts. Automaton has 6071 states and 22614 transitions. Word has length 28 [2021-06-12 22:18:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:55,151 INFO L482 AbstractCegarLoop]: Abstraction has 6071 states and 22614 transitions. [2021-06-12 22:18:55,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:55,151 INFO L276 IsEmpty]: Start isEmpty. Operand 6071 states and 22614 transitions. [2021-06-12 22:18:55,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:55,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:55,159 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:55,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3542,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:55,360 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:55,360 INFO L82 PathProgramCache]: Analyzing trace with hash -993359987, now seen corresponding path program 86 times [2021-06-12 22:18:55,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:55,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055982796] [2021-06-12 22:18:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:55,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055982796] [2021-06-12 22:18:55,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055982796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553427124] [2021-06-12 22:18:55,398 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:55,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:18:55,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:55,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:55,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553427124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:55,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:55,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:18:55,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472380587] [2021-06-12 22:18:55,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:18:55,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:55,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:18:55,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:18:55,482 INFO L87 Difference]: Start difference. First operand 6071 states and 22614 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:56,136 INFO L93 Difference]: Finished difference Result 12605 states and 43798 transitions. [2021-06-12 22:18:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 22:18:56,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:56,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:56,157 INFO L225 Difference]: With dead ends: 12605 [2021-06-12 22:18:56,157 INFO L226 Difference]: Without dead ends: 12605 [2021-06-12 22:18:56,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:18:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12605 states. [2021-06-12 22:18:56,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12605 to 6726. [2021-06-12 22:18:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6726 states, 6725 states have (on average 3.7414126394052043) internal successors, (25161), 6725 states have internal predecessors, (25161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6726 states to 6726 states and 25161 transitions. [2021-06-12 22:18:56,293 INFO L78 Accepts]: Start accepts. Automaton has 6726 states and 25161 transitions. Word has length 28 [2021-06-12 22:18:56,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:56,293 INFO L482 AbstractCegarLoop]: Abstraction has 6726 states and 25161 transitions. [2021-06-12 22:18:56,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:56,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6726 states and 25161 transitions. [2021-06-12 22:18:56,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:56,302 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:56,302 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:56,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3543 [2021-06-12 22:18:56,502 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:56,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:56,503 INFO L82 PathProgramCache]: Analyzing trace with hash 909319465, now seen corresponding path program 87 times [2021-06-12 22:18:56,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:56,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303566458] [2021-06-12 22:18:56,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:56,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:56,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303566458] [2021-06-12 22:18:56,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303566458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:56,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035563873] [2021-06-12 22:18:56,572 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:56,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:18:56,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:56,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:56,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:56,664 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:56,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035563873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:56,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:56,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:18:56,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120779041] [2021-06-12 22:18:56,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:18:56,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:56,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:18:56,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:18:56,665 INFO L87 Difference]: Start difference. First operand 6726 states and 25161 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:57,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:57,309 INFO L93 Difference]: Finished difference Result 12718 states and 44233 transitions. [2021-06-12 22:18:57,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:18:57,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:57,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:57,330 INFO L225 Difference]: With dead ends: 12718 [2021-06-12 22:18:57,330 INFO L226 Difference]: Without dead ends: 12718 [2021-06-12 22:18:57,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 369.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1908, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:18:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-06-12 22:18:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 6962. [2021-06-12 22:18:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.7214480678063495) internal successors, (25905), 6961 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 25905 transitions. [2021-06-12 22:18:57,475 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 25905 transitions. Word has length 28 [2021-06-12 22:18:57,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:57,475 INFO L482 AbstractCegarLoop]: Abstraction has 6962 states and 25905 transitions. [2021-06-12 22:18:57,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:57,475 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 25905 transitions. [2021-06-12 22:18:57,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:57,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:57,485 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:57,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3544,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:57,685 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash -173703191, now seen corresponding path program 88 times [2021-06-12 22:18:57,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:57,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143715918] [2021-06-12 22:18:57,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:57,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:57,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:57,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143715918] [2021-06-12 22:18:57,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143715918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:57,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622331926] [2021-06-12 22:18:57,712 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:57,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:18:57,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:57,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:57,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:18:57,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622331926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:57,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:57,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:18:57,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207715104] [2021-06-12 22:18:57,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:18:57,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:57,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:18:57,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:18:57,793 INFO L87 Difference]: Start difference. First operand 6962 states and 25905 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:58,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:58,154 INFO L93 Difference]: Finished difference Result 9470 states and 33921 transitions. [2021-06-12 22:18:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:18:58,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:58,169 INFO L225 Difference]: With dead ends: 9470 [2021-06-12 22:18:58,169 INFO L226 Difference]: Without dead ends: 9440 [2021-06-12 22:18:58,169 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:18:58,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9440 states. [2021-06-12 22:18:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9440 to 7814. [2021-06-12 22:18:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 7813 states have (on average 3.749904006143607) internal successors, (29298), 7813 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 29298 transitions. [2021-06-12 22:18:58,291 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 29298 transitions. Word has length 28 [2021-06-12 22:18:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:58,291 INFO L482 AbstractCegarLoop]: Abstraction has 7814 states and 29298 transitions. [2021-06-12 22:18:58,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 29298 transitions. [2021-06-12 22:18:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:58,301 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:58,301 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:58,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3545,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:58,506 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1297374927, now seen corresponding path program 89 times [2021-06-12 22:18:58,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:58,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110577396] [2021-06-12 22:18:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:58,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:58,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110577396] [2021-06-12 22:18:58,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110577396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:58,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460849330] [2021-06-12 22:18:58,533 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:58,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:18:58,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:58,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:18:58,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:58,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:58,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460849330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:58,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:58,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:18:58,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711703251] [2021-06-12 22:18:58,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:18:58,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:58,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:18:58,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:18:58,616 INFO L87 Difference]: Start difference. First operand 7814 states and 29298 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:58,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:18:58,942 INFO L93 Difference]: Finished difference Result 10065 states and 35894 transitions. [2021-06-12 22:18:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 22:18:58,942 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:18:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:18:58,957 INFO L225 Difference]: With dead ends: 10065 [2021-06-12 22:18:58,958 INFO L226 Difference]: Without dead ends: 10065 [2021-06-12 22:18:58,958 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-06-12 22:18:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2021-06-12 22:18:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 7854. [2021-06-12 22:18:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 3.7459569591239017) internal successors, (29417), 7853 states have internal predecessors, (29417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 29417 transitions. [2021-06-12 22:18:59,092 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 29417 transitions. Word has length 28 [2021-06-12 22:18:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:18:59,092 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 29417 transitions. [2021-06-12 22:18:59,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:18:59,092 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 29417 transitions. [2021-06-12 22:18:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:18:59,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:18:59,103 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:18:59,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3546,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:59,303 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:18:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:18:59,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1855439209, now seen corresponding path program 90 times [2021-06-12 22:18:59,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:18:59,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965128210] [2021-06-12 22:18:59,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:18:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:18:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:59,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:18:59,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965128210] [2021-06-12 22:18:59,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965128210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:59,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263679975] [2021-06-12 22:18:59,335 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:18:59,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:18:59,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:18:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:18:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:18:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:18:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263679975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:18:59,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:18:59,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-12 22:18:59,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109895210] [2021-06-12 22:18:59,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:18:59,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:18:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:18:59,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:18:59,415 INFO L87 Difference]: Start difference. First operand 7854 states and 29417 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:00,021 INFO L93 Difference]: Finished difference Result 13425 states and 47598 transitions. [2021-06-12 22:19:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:19:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:00,045 INFO L225 Difference]: With dead ends: 13425 [2021-06-12 22:19:00,045 INFO L226 Difference]: Without dead ends: 13421 [2021-06-12 22:19:00,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:19:00,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13421 states. [2021-06-12 22:19:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13421 to 7752. [2021-06-12 22:19:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7752 states, 7751 states have (on average 3.7497097148755) internal successors, (29064), 7751 states have internal predecessors, (29064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7752 states to 7752 states and 29064 transitions. [2021-06-12 22:19:00,205 INFO L78 Accepts]: Start accepts. Automaton has 7752 states and 29064 transitions. Word has length 28 [2021-06-12 22:19:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:00,206 INFO L482 AbstractCegarLoop]: Abstraction has 7752 states and 29064 transitions. [2021-06-12 22:19:00,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:00,206 INFO L276 IsEmpty]: Start isEmpty. Operand 7752 states and 29064 transitions. [2021-06-12 22:19:00,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:00,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:00,216 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:00,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3547,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:00,416 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:00,417 INFO L82 PathProgramCache]: Analyzing trace with hash 812772317, now seen corresponding path program 91 times [2021-06-12 22:19:00,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:00,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873589072] [2021-06-12 22:19:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:00,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:00,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873589072] [2021-06-12 22:19:00,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873589072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:00,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537265971] [2021-06-12 22:19:00,454 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:00,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:00,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:00,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:00,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537265971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:00,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:00,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:19:00,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212282228] [2021-06-12 22:19:00,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:19:00,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:00,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:19:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:19:00,545 INFO L87 Difference]: Start difference. First operand 7752 states and 29064 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:00,951 INFO L93 Difference]: Finished difference Result 10276 states and 36673 transitions. [2021-06-12 22:19:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 22:19:00,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:00,968 INFO L225 Difference]: With dead ends: 10276 [2021-06-12 22:19:00,968 INFO L226 Difference]: Without dead ends: 10276 [2021-06-12 22:19:00,968 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 225.9ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 22:19:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10276 states. [2021-06-12 22:19:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10276 to 7683. [2021-06-12 22:19:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.743686539963551) internal successors, (28759), 7682 states have internal predecessors, (28759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28759 transitions. [2021-06-12 22:19:01,121 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28759 transitions. Word has length 28 [2021-06-12 22:19:01,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:01,121 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28759 transitions. [2021-06-12 22:19:01,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:01,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28759 transitions. [2021-06-12 22:19:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:01,131 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:01,131 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:01,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3548 [2021-06-12 22:19:01,331 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash 933737069, now seen corresponding path program 92 times [2021-06-12 22:19:01,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:01,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128263549] [2021-06-12 22:19:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:01,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:01,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128263549] [2021-06-12 22:19:01,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128263549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:01,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237413581] [2021-06-12 22:19:01,370 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:01,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:01,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:01,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:01,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:01,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237413581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:01,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:01,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:19:01,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965469741] [2021-06-12 22:19:01,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:19:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:19:01,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:19:01,449 INFO L87 Difference]: Start difference. First operand 7683 states and 28759 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:02,061 INFO L93 Difference]: Finished difference Result 13291 states and 47039 transitions. [2021-06-12 22:19:02,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 22:19:02,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:02,084 INFO L225 Difference]: With dead ends: 13291 [2021-06-12 22:19:02,084 INFO L226 Difference]: Without dead ends: 13279 [2021-06-12 22:19:02,085 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 347.9ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:19:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13279 states. [2021-06-12 22:19:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13279 to 7683. [2021-06-12 22:19:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.7431658422285863) internal successors, (28755), 7682 states have internal predecessors, (28755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28755 transitions. [2021-06-12 22:19:02,246 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28755 transitions. Word has length 28 [2021-06-12 22:19:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:02,246 INFO L482 AbstractCegarLoop]: Abstraction has 7683 states and 28755 transitions. [2021-06-12 22:19:02,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28755 transitions. [2021-06-12 22:19:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:02,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:02,257 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:02,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-12 22:19:02,457 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash -306445935, now seen corresponding path program 93 times [2021-06-12 22:19:02,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:02,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876992465] [2021-06-12 22:19:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:02,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:02,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876992465] [2021-06-12 22:19:02,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876992465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:02,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089842002] [2021-06-12 22:19:02,496 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:02,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:19:02,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:02,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089842002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:02,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:02,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:19:02,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603328744] [2021-06-12 22:19:02,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:19:02,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:02,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:19:02,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:19:02,632 INFO L87 Difference]: Start difference. First operand 7683 states and 28755 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:03,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:03,694 INFO L93 Difference]: Finished difference Result 20069 states and 69965 transitions. [2021-06-12 22:19:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-12 22:19:03,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:03,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:03,728 INFO L225 Difference]: With dead ends: 20069 [2021-06-12 22:19:03,728 INFO L226 Difference]: Without dead ends: 20069 [2021-06-12 22:19:03,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 661.7ms TimeCoverageRelationStatistics Valid=1218, Invalid=4482, Unknown=0, NotChecked=0, Total=5700 [2021-06-12 22:19:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20069 states. [2021-06-12 22:19:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20069 to 10444. [2021-06-12 22:19:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 3.790577420281528) internal successors, (39585), 10443 states have internal predecessors, (39585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 39585 transitions. [2021-06-12 22:19:04,055 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 39585 transitions. Word has length 28 [2021-06-12 22:19:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:04,055 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 39585 transitions. [2021-06-12 22:19:04,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 39585 transitions. [2021-06-12 22:19:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:04,071 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:04,071 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:04,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3550,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:04,272 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:04,272 INFO L82 PathProgramCache]: Analyzing trace with hash 765871039, now seen corresponding path program 94 times [2021-06-12 22:19:04,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:04,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595238713] [2021-06-12 22:19:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:04,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:04,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595238713] [2021-06-12 22:19:04,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595238713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:04,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849127401] [2021-06-12 22:19:04,314 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:04,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:04,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:04,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:04,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849127401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:04,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:04,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:19:04,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373454229] [2021-06-12 22:19:04,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:19:04,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:19:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:19:04,409 INFO L87 Difference]: Start difference. First operand 10444 states and 39585 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:05,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:05,377 INFO L93 Difference]: Finished difference Result 19312 states and 67991 transitions. [2021-06-12 22:19:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:19:05,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:05,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:05,411 INFO L225 Difference]: With dead ends: 19312 [2021-06-12 22:19:05,412 INFO L226 Difference]: Without dead ends: 19300 [2021-06-12 22:19:05,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1736 ImplicationChecksByTransitivity, 577.7ms TimeCoverageRelationStatistics Valid=1059, Invalid=3771, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:19:05,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19300 states. [2021-06-12 22:19:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19300 to 10242. [2021-06-12 22:19:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10242 states, 10241 states have (on average 3.799043062200957) internal successors, (38906), 10241 states have internal predecessors, (38906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:05,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10242 states to 10242 states and 38906 transitions. [2021-06-12 22:19:05,724 INFO L78 Accepts]: Start accepts. Automaton has 10242 states and 38906 transitions. Word has length 28 [2021-06-12 22:19:05,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:05,724 INFO L482 AbstractCegarLoop]: Abstraction has 10242 states and 38906 transitions. [2021-06-12 22:19:05,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:05,724 INFO L276 IsEmpty]: Start isEmpty. Operand 10242 states and 38906 transitions. [2021-06-12 22:19:05,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:05,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:05,738 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:05,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3551 [2021-06-12 22:19:05,938 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2026707565, now seen corresponding path program 95 times [2021-06-12 22:19:05,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:05,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160123986] [2021-06-12 22:19:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:05,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:05,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160123986] [2021-06-12 22:19:05,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160123986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:05,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821528713] [2021-06-12 22:19:05,977 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:06,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:19:06,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:06,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:06,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821528713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:06,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:06,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:19:06,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342389693] [2021-06-12 22:19:06,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:19:06,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:06,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:19:06,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:19:06,066 INFO L87 Difference]: Start difference. First operand 10242 states and 38906 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:07,014 INFO L93 Difference]: Finished difference Result 19128 states and 67337 transitions. [2021-06-12 22:19:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:19:07,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:07,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:07,048 INFO L225 Difference]: With dead ends: 19128 [2021-06-12 22:19:07,048 INFO L226 Difference]: Without dead ends: 19092 [2021-06-12 22:19:07,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 536.9ms TimeCoverageRelationStatistics Valid=906, Invalid=3384, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 22:19:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19092 states. [2021-06-12 22:19:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19092 to 10290. [2021-06-12 22:19:07,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10290 states, 10289 states have (on average 3.7970648265137528) internal successors, (39068), 10289 states have internal predecessors, (39068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:07,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10290 states to 10290 states and 39068 transitions. [2021-06-12 22:19:07,354 INFO L78 Accepts]: Start accepts. Automaton has 10290 states and 39068 transitions. Word has length 28 [2021-06-12 22:19:07,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:07,354 INFO L482 AbstractCegarLoop]: Abstraction has 10290 states and 39068 transitions. [2021-06-12 22:19:07,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:07,354 INFO L276 IsEmpty]: Start isEmpty. Operand 10290 states and 39068 transitions. [2021-06-12 22:19:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:07,369 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:07,369 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:07,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3552,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:07,570 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:07,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:07,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1595973395, now seen corresponding path program 96 times [2021-06-12 22:19:07,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:07,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127091008] [2021-06-12 22:19:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:07,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127091008] [2021-06-12 22:19:07,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127091008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:07,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960947093] [2021-06-12 22:19:07,609 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:07,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:19:07,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:07,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960947093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:07,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:07,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:19:07,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25833458] [2021-06-12 22:19:07,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:07,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:07,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:07,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:07,725 INFO L87 Difference]: Start difference. First operand 10290 states and 39068 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:19:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:09,054 INFO L93 Difference]: Finished difference Result 19050 states and 67176 transitions. [2021-06-12 22:19:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-12 22:19:09,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-06-12 22:19:09,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:09,087 INFO L225 Difference]: With dead ends: 19050 [2021-06-12 22:19:09,087 INFO L226 Difference]: Without dead ends: 19050 [2021-06-12 22:19:09,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 834.9ms TimeCoverageRelationStatistics Valid=1494, Invalid=5646, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:19:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19050 states. [2021-06-12 22:19:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19050 to 10488. [2021-06-12 22:19:09,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10488 states, 10487 states have (on average 3.787832554591399) internal successors, (39723), 10487 states have internal predecessors, (39723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10488 states to 10488 states and 39723 transitions. [2021-06-12 22:19:09,374 INFO L78 Accepts]: Start accepts. Automaton has 10488 states and 39723 transitions. Word has length 28 [2021-06-12 22:19:09,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:09,374 INFO L482 AbstractCegarLoop]: Abstraction has 10488 states and 39723 transitions. [2021-06-12 22:19:09,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:19:09,374 INFO L276 IsEmpty]: Start isEmpty. Operand 10488 states and 39723 transitions. [2021-06-12 22:19:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:09,389 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:09,389 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:09,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3553,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:09,590 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:09,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1643616507, now seen corresponding path program 97 times [2021-06-12 22:19:09,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:09,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740837395] [2021-06-12 22:19:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:09,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740837395] [2021-06-12 22:19:09,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740837395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:09,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261700977] [2021-06-12 22:19:09,629 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:09,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:09,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:09,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261700977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:09,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:09,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:19:09,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463577024] [2021-06-12 22:19:09,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:09,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:09,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:09,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:09,743 INFO L87 Difference]: Start difference. First operand 10488 states and 39723 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:19:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:10,918 INFO L93 Difference]: Finished difference Result 18660 states and 66098 transitions. [2021-06-12 22:19:10,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 22:19:10,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-06-12 22:19:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:10,951 INFO L225 Difference]: With dead ends: 18660 [2021-06-12 22:19:10,951 INFO L226 Difference]: Without dead ends: 18648 [2021-06-12 22:19:10,952 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=1305, Invalid=4547, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:19:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-12 22:19:11,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 10366. [2021-06-12 22:19:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 3.7916063675832126) internal successors, (39300), 10365 states have internal predecessors, (39300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 39300 transitions. [2021-06-12 22:19:11,288 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 39300 transitions. Word has length 28 [2021-06-12 22:19:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:11,289 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 39300 transitions. [2021-06-12 22:19:11,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:19:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 39300 transitions. [2021-06-12 22:19:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:11,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:11,304 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:11,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3554,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:11,504 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:11,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:11,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1168215851, now seen corresponding path program 98 times [2021-06-12 22:19:11,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:11,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309917699] [2021-06-12 22:19:11,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:11,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:11,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309917699] [2021-06-12 22:19:11,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309917699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:11,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044469489] [2021-06-12 22:19:11,547 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:11,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:11,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:11,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:11,653 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:11,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044469489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:11,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:11,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:19:11,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144782969] [2021-06-12 22:19:11,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:19:11,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:11,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:19:11,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:19:11,654 INFO L87 Difference]: Start difference. First operand 10366 states and 39300 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:19:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:12,669 INFO L93 Difference]: Finished difference Result 17898 states and 64003 transitions. [2021-06-12 22:19:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:19:12,669 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-12 22:19:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:12,701 INFO L225 Difference]: With dead ends: 17898 [2021-06-12 22:19:12,701 INFO L226 Difference]: Without dead ends: 17862 [2021-06-12 22:19:12,701 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 577.9ms TimeCoverageRelationStatistics Valid=951, Invalid=3471, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:19:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17862 states. [2021-06-12 22:19:12,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17862 to 10386. [2021-06-12 22:19:12,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10386 states, 10385 states have (on average 3.7906596051998074) internal successors, (39366), 10385 states have internal predecessors, (39366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10386 states to 10386 states and 39366 transitions. [2021-06-12 22:19:12,928 INFO L78 Accepts]: Start accepts. Automaton has 10386 states and 39366 transitions. Word has length 28 [2021-06-12 22:19:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:12,928 INFO L482 AbstractCegarLoop]: Abstraction has 10386 states and 39366 transitions. [2021-06-12 22:19:12,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:19:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10386 states and 39366 transitions. [2021-06-12 22:19:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:12,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:12,999 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:13,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3555 [2021-06-12 22:19:13,200 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:13,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1708660749, now seen corresponding path program 99 times [2021-06-12 22:19:13,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:13,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519036146] [2021-06-12 22:19:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:13,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:13,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:13,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519036146] [2021-06-12 22:19:13,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519036146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:13,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703056119] [2021-06-12 22:19:13,233 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:13,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:19:13,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:13,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:13,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:13,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703056119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:13,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:13,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:19:13,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237229027] [2021-06-12 22:19:13,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:13,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:13,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:13,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:13,355 INFO L87 Difference]: Start difference. First operand 10386 states and 39366 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:14,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:14,581 INFO L93 Difference]: Finished difference Result 26075 states and 92737 transitions. [2021-06-12 22:19:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-12 22:19:14,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:14,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:14,632 INFO L225 Difference]: With dead ends: 26075 [2021-06-12 22:19:14,632 INFO L226 Difference]: Without dead ends: 26075 [2021-06-12 22:19:14,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 723.1ms TimeCoverageRelationStatistics Valid=1326, Invalid=4680, Unknown=0, NotChecked=0, Total=6006 [2021-06-12 22:19:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26075 states. [2021-06-12 22:19:14,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26075 to 10692. [2021-06-12 22:19:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10692 states, 10691 states have (on average 3.8184454213824712) internal successors, (40823), 10691 states have internal predecessors, (40823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:14,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10692 states to 10692 states and 40823 transitions. [2021-06-12 22:19:14,928 INFO L78 Accepts]: Start accepts. Automaton has 10692 states and 40823 transitions. Word has length 28 [2021-06-12 22:19:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:14,928 INFO L482 AbstractCegarLoop]: Abstraction has 10692 states and 40823 transitions. [2021-06-12 22:19:14,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10692 states and 40823 transitions. [2021-06-12 22:19:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:14,943 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:14,943 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:15,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3556,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:15,143 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:15,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:15,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1057401903, now seen corresponding path program 100 times [2021-06-12 22:19:15,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:15,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89575418] [2021-06-12 22:19:15,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:15,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89575418] [2021-06-12 22:19:15,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89575418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:15,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612396] [2021-06-12 22:19:15,177 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:15,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:15,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:15,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:15,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:15,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:15,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:15,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:19:15,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827310731] [2021-06-12 22:19:15,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:15,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:15,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:15,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:15,351 INFO L87 Difference]: Start difference. First operand 10692 states and 40823 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:16,533 INFO L93 Difference]: Finished difference Result 25519 states and 91410 transitions. [2021-06-12 22:19:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 22:19:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:16,583 INFO L225 Difference]: With dead ends: 25519 [2021-06-12 22:19:16,583 INFO L226 Difference]: Without dead ends: 25519 [2021-06-12 22:19:16,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2286 ImplicationChecksByTransitivity, 713.4ms TimeCoverageRelationStatistics Valid=1315, Invalid=4537, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 22:19:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25519 states. [2021-06-12 22:19:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25519 to 10592. [2021-06-12 22:19:16,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.8053063922198094) internal successors, (40302), 10591 states have internal predecessors, (40302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:16,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 40302 transitions. [2021-06-12 22:19:16,882 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 40302 transitions. Word has length 28 [2021-06-12 22:19:16,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:16,882 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 40302 transitions. [2021-06-12 22:19:16,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 40302 transitions. [2021-06-12 22:19:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:16,896 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:16,896 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:17,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:17,097 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:17,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1158271565, now seen corresponding path program 101 times [2021-06-12 22:19:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:17,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470936588] [2021-06-12 22:19:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:17,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:17,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470936588] [2021-06-12 22:19:17,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470936588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:17,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351557695] [2021-06-12 22:19:17,130 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:17,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:19:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:17,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:17,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351557695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:17,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:17,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:19:17,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976305254] [2021-06-12 22:19:17,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:19:17,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:17,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:19:17,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:19:17,243 INFO L87 Difference]: Start difference. First operand 10592 states and 40302 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:18,080 INFO L93 Difference]: Finished difference Result 20262 states and 72808 transitions. [2021-06-12 22:19:18,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:19:18,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:18,116 INFO L225 Difference]: With dead ends: 20262 [2021-06-12 22:19:18,116 INFO L226 Difference]: Without dead ends: 20262 [2021-06-12 22:19:18,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:19:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20262 states. [2021-06-12 22:19:18,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20262 to 10601. [2021-06-12 22:19:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10601 states, 10600 states have (on average 3.8042452830188678) internal successors, (40325), 10600 states have internal predecessors, (40325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10601 states to 10601 states and 40325 transitions. [2021-06-12 22:19:18,356 INFO L78 Accepts]: Start accepts. Automaton has 10601 states and 40325 transitions. Word has length 28 [2021-06-12 22:19:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:18,356 INFO L482 AbstractCegarLoop]: Abstraction has 10601 states and 40325 transitions. [2021-06-12 22:19:18,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10601 states and 40325 transitions. [2021-06-12 22:19:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:18,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:18,371 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:18,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3558,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:18,571 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash 545777745, now seen corresponding path program 102 times [2021-06-12 22:19:18,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:18,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214778553] [2021-06-12 22:19:18,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:18,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:18,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214778553] [2021-06-12 22:19:18,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214778553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:18,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85635794] [2021-06-12 22:19:18,605 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:18,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:19:18,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:18,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:18,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:18,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85635794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:18,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:18,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:19:18,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283720873] [2021-06-12 22:19:18,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:19:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:19:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:19:18,718 INFO L87 Difference]: Start difference. First operand 10601 states and 40325 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:19:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:19,450 INFO L93 Difference]: Finished difference Result 18811 states and 68168 transitions. [2021-06-12 22:19:19,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 22:19:19,450 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-06-12 22:19:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:19,484 INFO L225 Difference]: With dead ends: 18811 [2021-06-12 22:19:19,484 INFO L226 Difference]: Without dead ends: 18811 [2021-06-12 22:19:19,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:19:19,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18811 states. [2021-06-12 22:19:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18811 to 10613. [2021-06-12 22:19:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 3.80352431209951) internal successors, (40363), 10612 states have internal predecessors, (40363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 40363 transitions. [2021-06-12 22:19:19,774 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 40363 transitions. Word has length 28 [2021-06-12 22:19:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:19,774 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 40363 transitions. [2021-06-12 22:19:19,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2021-06-12 22:19:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 40363 transitions. [2021-06-12 22:19:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:19,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:19,788 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:19,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3559 [2021-06-12 22:19:19,988 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:19,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:19,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1430395937, now seen corresponding path program 103 times [2021-06-12 22:19:19,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:19,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676530834] [2021-06-12 22:19:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:20,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:20,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676530834] [2021-06-12 22:19:20,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676530834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:20,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363672449] [2021-06-12 22:19:20,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:20,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363672449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:20,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:20,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:19:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167811464] [2021-06-12 22:19:20,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:20,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:20,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:20,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:20,142 INFO L87 Difference]: Start difference. First operand 10613 states and 40363 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:19:21,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:21,168 INFO L93 Difference]: Finished difference Result 19418 states and 69911 transitions. [2021-06-12 22:19:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 22:19:21,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-06-12 22:19:21,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:21,204 INFO L225 Difference]: With dead ends: 19418 [2021-06-12 22:19:21,204 INFO L226 Difference]: Without dead ends: 19418 [2021-06-12 22:19:21,204 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 657.5ms TimeCoverageRelationStatistics Valid=1084, Invalid=4028, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 22:19:21,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19418 states. [2021-06-12 22:19:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19418 to 10725. [2021-06-12 22:19:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10725 states, 10724 states have (on average 3.7958784035807533) internal successors, (40707), 10724 states have internal predecessors, (40707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:21,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10725 states to 10725 states and 40707 transitions. [2021-06-12 22:19:21,451 INFO L78 Accepts]: Start accepts. Automaton has 10725 states and 40707 transitions. Word has length 28 [2021-06-12 22:19:21,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:21,452 INFO L482 AbstractCegarLoop]: Abstraction has 10725 states and 40707 transitions. [2021-06-12 22:19:21,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:19:21,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10725 states and 40707 transitions. [2021-06-12 22:19:21,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:21,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:21,465 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:21,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3560 [2021-06-12 22:19:21,666 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:21,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:21,666 INFO L82 PathProgramCache]: Analyzing trace with hash 375018543, now seen corresponding path program 104 times [2021-06-12 22:19:21,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:21,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213206583] [2021-06-12 22:19:21,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:21,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:21,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213206583] [2021-06-12 22:19:21,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213206583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:21,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28077760] [2021-06-12 22:19:21,700 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:21,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:21,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:21,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:21,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28077760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:21,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:21,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:19:21,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100006476] [2021-06-12 22:19:21,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:21,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:21,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:21,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:21,815 INFO L87 Difference]: Start difference. First operand 10725 states and 40707 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:19:22,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:22,811 INFO L93 Difference]: Finished difference Result 18990 states and 68747 transitions. [2021-06-12 22:19:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:19:22,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-06-12 22:19:22,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:22,848 INFO L225 Difference]: With dead ends: 18990 [2021-06-12 22:19:22,848 INFO L226 Difference]: Without dead ends: 18986 [2021-06-12 22:19:22,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 583.9ms TimeCoverageRelationStatistics Valid=880, Invalid=2902, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 22:19:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18986 states. [2021-06-12 22:19:23,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18986 to 10651. [2021-06-12 22:19:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10651 states, 10650 states have (on average 3.7998122065727697) internal successors, (40468), 10650 states have internal predecessors, (40468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10651 states to 10651 states and 40468 transitions. [2021-06-12 22:19:23,088 INFO L78 Accepts]: Start accepts. Automaton has 10651 states and 40468 transitions. Word has length 28 [2021-06-12 22:19:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:23,088 INFO L482 AbstractCegarLoop]: Abstraction has 10651 states and 40468 transitions. [2021-06-12 22:19:23,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:19:23,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10651 states and 40468 transitions. [2021-06-12 22:19:23,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:23,102 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:23,102 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:23,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3561 [2021-06-12 22:19:23,303 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash -156751667, now seen corresponding path program 105 times [2021-06-12 22:19:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:23,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771636354] [2021-06-12 22:19:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:23,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771636354] [2021-06-12 22:19:23,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771636354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117211640] [2021-06-12 22:19:23,343 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:23,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 22:19:23,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:23,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:23,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:23,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117211640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:23,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:23,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:19:23,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994114253] [2021-06-12 22:19:23,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:23,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:23,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:23,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:23,458 INFO L87 Difference]: Start difference. First operand 10651 states and 40468 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:19:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:24,454 INFO L93 Difference]: Finished difference Result 18417 states and 66232 transitions. [2021-06-12 22:19:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 22:19:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-12 22:19:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:24,486 INFO L225 Difference]: With dead ends: 18417 [2021-06-12 22:19:24,487 INFO L226 Difference]: Without dead ends: 18417 [2021-06-12 22:19:24,487 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=1023, Invalid=3669, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:19:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18417 states. [2021-06-12 22:19:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18417 to 10878. [2021-06-12 22:19:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10878 states, 10877 states have (on average 3.803070699641445) internal successors, (41366), 10877 states have internal predecessors, (41366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:24,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10878 states to 10878 states and 41366 transitions. [2021-06-12 22:19:24,769 INFO L78 Accepts]: Start accepts. Automaton has 10878 states and 41366 transitions. Word has length 28 [2021-06-12 22:19:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:24,769 INFO L482 AbstractCegarLoop]: Abstraction has 10878 states and 41366 transitions. [2021-06-12 22:19:24,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:19:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 10878 states and 41366 transitions. [2021-06-12 22:19:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:24,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:24,783 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:24,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3562 [2021-06-12 22:19:24,984 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:24,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:24,984 INFO L82 PathProgramCache]: Analyzing trace with hash -534318835, now seen corresponding path program 106 times [2021-06-12 22:19:24,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:24,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666929774] [2021-06-12 22:19:24,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:25,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:25,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666929774] [2021-06-12 22:19:25,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666929774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:25,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825543821] [2021-06-12 22:19:25,023 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:25,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:25,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:25,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:25,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825543821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:25,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:25,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 22:19:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624529337] [2021-06-12 22:19:25,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:25,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:25,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:25,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:25,128 INFO L87 Difference]: Start difference. First operand 10878 states and 41366 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:19:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:26,009 INFO L93 Difference]: Finished difference Result 18127 states and 65426 transitions. [2021-06-12 22:19:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:19:26,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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 28 [2021-06-12 22:19:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:26,041 INFO L225 Difference]: With dead ends: 18127 [2021-06-12 22:19:26,041 INFO L226 Difference]: Without dead ends: 18115 [2021-06-12 22:19:26,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=893, Invalid=3267, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:19:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18115 states. [2021-06-12 22:19:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18115 to 10980. [2021-06-12 22:19:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10980 states, 10979 states have (on average 3.79715821113034) internal successors, (41689), 10979 states have internal predecessors, (41689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10980 states to 10980 states and 41689 transitions. [2021-06-12 22:19:26,290 INFO L78 Accepts]: Start accepts. Automaton has 10980 states and 41689 transitions. Word has length 28 [2021-06-12 22:19:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:26,290 INFO L482 AbstractCegarLoop]: Abstraction has 10980 states and 41689 transitions. [2021-06-12 22:19:26,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 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) [2021-06-12 22:19:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 10980 states and 41689 transitions. [2021-06-12 22:19:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:26,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:26,305 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:26,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3563,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:26,506 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:26,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1732149001, now seen corresponding path program 73 times [2021-06-12 22:19:26,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:26,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659373610] [2021-06-12 22:19:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:26,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:26,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659373610] [2021-06-12 22:19:26,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659373610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:26,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770129591] [2021-06-12 22:19:26,545 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:26,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:26,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770129591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:26,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:26,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:19:26,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416607890] [2021-06-12 22:19:26,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:19:26,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:26,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:19:26,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:19:26,630 INFO L87 Difference]: Start difference. First operand 10980 states and 41689 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:27,094 INFO L93 Difference]: Finished difference Result 15635 states and 57800 transitions. [2021-06-12 22:19:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 22:19:27,095 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:27,123 INFO L225 Difference]: With dead ends: 15635 [2021-06-12 22:19:27,124 INFO L226 Difference]: Without dead ends: 15635 [2021-06-12 22:19:27,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=303, Invalid=887, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:19:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15635 states. [2021-06-12 22:19:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15635 to 11052. [2021-06-12 22:19:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 11051 states have (on average 3.7925074653877475) internal successors, (41911), 11051 states have internal predecessors, (41911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 41911 transitions. [2021-06-12 22:19:27,373 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 41911 transitions. Word has length 28 [2021-06-12 22:19:27,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:27,373 INFO L482 AbstractCegarLoop]: Abstraction has 11052 states and 41911 transitions. [2021-06-12 22:19:27,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:27,374 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 41911 transitions. [2021-06-12 22:19:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:27,389 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:27,389 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:27,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3564,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:27,590 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash -38357591, now seen corresponding path program 74 times [2021-06-12 22:19:27,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:27,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096434694] [2021-06-12 22:19:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:27,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:27,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096434694] [2021-06-12 22:19:27,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096434694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982497983] [2021-06-12 22:19:27,625 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:27,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:27,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:27,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:27,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:27,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982497983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:27,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:27,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:19:27,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263828372] [2021-06-12 22:19:27,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:19:27,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:27,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:19:27,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:19:27,710 INFO L87 Difference]: Start difference. First operand 11052 states and 41911 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:28,215 INFO L93 Difference]: Finished difference Result 16589 states and 60571 transitions. [2021-06-12 22:19:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:19:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:28,246 INFO L225 Difference]: With dead ends: 16589 [2021-06-12 22:19:28,246 INFO L226 Difference]: Without dead ends: 16589 [2021-06-12 22:19:28,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:19:28,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16589 states. [2021-06-12 22:19:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16589 to 11366. [2021-06-12 22:19:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11366 states, 11365 states have (on average 3.7756269247690275) internal successors, (42910), 11365 states have internal predecessors, (42910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:28,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11366 states to 11366 states and 42910 transitions. [2021-06-12 22:19:28,483 INFO L78 Accepts]: Start accepts. Automaton has 11366 states and 42910 transitions. Word has length 28 [2021-06-12 22:19:28,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:28,483 INFO L482 AbstractCegarLoop]: Abstraction has 11366 states and 42910 transitions. [2021-06-12 22:19:28,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 11366 states and 42910 transitions. [2021-06-12 22:19:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:28,499 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:28,499 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:28,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3565,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:28,699 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash 907762153, now seen corresponding path program 75 times [2021-06-12 22:19:28,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:28,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775936392] [2021-06-12 22:19:28,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:28,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:28,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775936392] [2021-06-12 22:19:28,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775936392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:28,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645145776] [2021-06-12 22:19:28,732 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:28,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 22:19:28,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:28,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:28,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:28,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645145776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:28,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:28,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:19:28,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121737121] [2021-06-12 22:19:28,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:19:28,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:28,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:19:28,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:19:28,811 INFO L87 Difference]: Start difference. First operand 11366 states and 42910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:29,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:29,207 INFO L93 Difference]: Finished difference Result 16097 states and 59284 transitions. [2021-06-12 22:19:29,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 22:19:29,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:29,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:29,238 INFO L225 Difference]: With dead ends: 16097 [2021-06-12 22:19:29,238 INFO L226 Difference]: Without dead ends: 16089 [2021-06-12 22:19:29,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 22:19:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-12 22:19:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 11306. [2021-06-12 22:19:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11306 states, 11305 states have (on average 3.77797434763379) internal successors, (42710), 11305 states have internal predecessors, (42710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:29,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11306 states to 11306 states and 42710 transitions. [2021-06-12 22:19:29,507 INFO L78 Accepts]: Start accepts. Automaton has 11306 states and 42710 transitions. Word has length 28 [2021-06-12 22:19:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:29,507 INFO L482 AbstractCegarLoop]: Abstraction has 11306 states and 42710 transitions. [2021-06-12 22:19:29,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 11306 states and 42710 transitions. [2021-06-12 22:19:29,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:29,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:29,524 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:29,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3566,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:29,724 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:29,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:29,724 INFO L82 PathProgramCache]: Analyzing trace with hash -13939987, now seen corresponding path program 76 times [2021-06-12 22:19:29,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:29,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533925201] [2021-06-12 22:19:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:29,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:29,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:29,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533925201] [2021-06-12 22:19:29,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533925201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:29,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660688158] [2021-06-12 22:19:29,763 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:29,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:29,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:29,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:29,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:29,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660688158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:29,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:29,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:19:29,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280752424] [2021-06-12 22:19:29,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:19:29,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:29,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:19:29,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:19:29,842 INFO L87 Difference]: Start difference. First operand 11306 states and 42710 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:30,261 INFO L93 Difference]: Finished difference Result 15997 states and 59000 transitions. [2021-06-12 22:19:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 22:19:30,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:30,292 INFO L225 Difference]: With dead ends: 15997 [2021-06-12 22:19:30,292 INFO L226 Difference]: Without dead ends: 15985 [2021-06-12 22:19:30,293 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=329, Invalid=1003, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 22:19:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15985 states. [2021-06-12 22:19:30,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15985 to 11272. [2021-06-12 22:19:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.780055008428711) internal successors, (42605), 11271 states have internal predecessors, (42605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:30,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 42605 transitions. [2021-06-12 22:19:30,515 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 42605 transitions. Word has length 28 [2021-06-12 22:19:30,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:30,515 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 42605 transitions. [2021-06-12 22:19:30,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:30,515 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 42605 transitions. [2021-06-12 22:19:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:30,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:30,531 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:30,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3567 [2021-06-12 22:19:30,731 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:30,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:30,732 INFO L82 PathProgramCache]: Analyzing trace with hash -141251547, now seen corresponding path program 77 times [2021-06-12 22:19:30,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:30,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596015832] [2021-06-12 22:19:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:30,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:30,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596015832] [2021-06-12 22:19:30,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596015832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:30,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171380010] [2021-06-12 22:19:30,766 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:30,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:19:30,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:30,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171380010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:30,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:30,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:19:30,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919483415] [2021-06-12 22:19:30,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:19:30,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:19:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:19:30,878 INFO L87 Difference]: Start difference. First operand 11272 states and 42605 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-06-12 22:19:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:31,771 INFO L93 Difference]: Finished difference Result 21775 states and 77547 transitions. [2021-06-12 22:19:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:19:31,771 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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 28 [2021-06-12 22:19:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:31,812 INFO L225 Difference]: With dead ends: 21775 [2021-06-12 22:19:31,812 INFO L226 Difference]: Without dead ends: 21775 [2021-06-12 22:19:31,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 495.3ms TimeCoverageRelationStatistics Valid=798, Invalid=2394, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:19:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-12 22:19:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 11246. [2021-06-12 22:19:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11246 states, 11245 states have (on average 3.779101823032459) internal successors, (42496), 11245 states have internal predecessors, (42496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:32,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 42496 transitions. [2021-06-12 22:19:32,120 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 42496 transitions. Word has length 28 [2021-06-12 22:19:32,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:32,120 INFO L482 AbstractCegarLoop]: Abstraction has 11246 states and 42496 transitions. [2021-06-12 22:19:32,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 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) [2021-06-12 22:19:32,120 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 42496 transitions. [2021-06-12 22:19:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:32,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:32,136 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:32,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3568,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:32,337 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 385520361, now seen corresponding path program 107 times [2021-06-12 22:19:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:32,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346631982] [2021-06-12 22:19:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:32,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:32,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346631982] [2021-06-12 22:19:32,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346631982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:32,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995894219] [2021-06-12 22:19:32,363 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:32,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:19:32,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:32,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:32,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995894219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:32,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:32,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:19:32,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128758649] [2021-06-12 22:19:32,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:19:32,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:32,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:19:32,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:19:32,480 INFO L87 Difference]: Start difference. First operand 11246 states and 42496 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-06-12 22:19:33,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:33,141 INFO L93 Difference]: Finished difference Result 17570 states and 63375 transitions. [2021-06-12 22:19:33,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 22:19:33,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-06-12 22:19:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:33,172 INFO L225 Difference]: With dead ends: 17570 [2021-06-12 22:19:33,172 INFO L226 Difference]: Without dead ends: 17557 [2021-06-12 22:19:33,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=478, Invalid=1414, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 22:19:33,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17557 states. [2021-06-12 22:19:33,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17557 to 12557. [2021-06-12 22:19:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12557 states, 12556 states have (on average 3.8467664861420836) internal successors, (48300), 12556 states have internal predecessors, (48300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12557 states to 12557 states and 48300 transitions. [2021-06-12 22:19:33,440 INFO L78 Accepts]: Start accepts. Automaton has 12557 states and 48300 transitions. Word has length 28 [2021-06-12 22:19:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:33,440 INFO L482 AbstractCegarLoop]: Abstraction has 12557 states and 48300 transitions. [2021-06-12 22:19:33,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-06-12 22:19:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 12557 states and 48300 transitions. [2021-06-12 22:19:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:33,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:33,459 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:33,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3569 [2021-06-12 22:19:33,660 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:33,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1057933143, now seen corresponding path program 108 times [2021-06-12 22:19:33,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:33,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000639734] [2021-06-12 22:19:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:33,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:33,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000639734] [2021-06-12 22:19:33,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000639734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:33,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569300491] [2021-06-12 22:19:33,686 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:33,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:19:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:33,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:33,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569300491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:33,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:33,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-12 22:19:33,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000048125] [2021-06-12 22:19:33,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:19:33,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:33,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:19:33,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:19:33,790 INFO L87 Difference]: Start difference. First operand 12557 states and 48300 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-06-12 22:19:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:34,537 INFO L93 Difference]: Finished difference Result 17668 states and 63624 transitions. [2021-06-12 22:19:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:19:34,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 28 [2021-06-12 22:19:34,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:34,569 INFO L225 Difference]: With dead ends: 17668 [2021-06-12 22:19:34,569 INFO L226 Difference]: Without dead ends: 17662 [2021-06-12 22:19:34,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=541, Invalid=1715, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:19:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17662 states. [2021-06-12 22:19:34,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17662 to 12530. [2021-06-12 22:19:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12530 states, 12529 states have (on average 3.845957378880996) internal successors, (48186), 12529 states have internal predecessors, (48186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12530 states to 12530 states and 48186 transitions. [2021-06-12 22:19:34,862 INFO L78 Accepts]: Start accepts. Automaton has 12530 states and 48186 transitions. Word has length 28 [2021-06-12 22:19:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:34,862 INFO L482 AbstractCegarLoop]: Abstraction has 12530 states and 48186 transitions. [2021-06-12 22:19:34,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2021-06-12 22:19:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 12530 states and 48186 transitions. [2021-06-12 22:19:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:34,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:34,878 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:35,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3570 [2021-06-12 22:19:35,079 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash -757405679, now seen corresponding path program 109 times [2021-06-12 22:19:35,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:35,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061707524] [2021-06-12 22:19:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:35,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:35,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061707524] [2021-06-12 22:19:35,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061707524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:35,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947626370] [2021-06-12 22:19:35,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:35,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:35,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:35,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947626370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:35,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:35,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:19:35,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145785833] [2021-06-12 22:19:35,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:19:35,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:35,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:19:35,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:19:35,199 INFO L87 Difference]: Start difference. First operand 12530 states and 48186 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:35,790 INFO L93 Difference]: Finished difference Result 19731 states and 71148 transitions. [2021-06-12 22:19:35,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:19:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:35,824 INFO L225 Difference]: With dead ends: 19731 [2021-06-12 22:19:35,824 INFO L226 Difference]: Without dead ends: 19718 [2021-06-12 22:19:35,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:19:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19718 states. [2021-06-12 22:19:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19718 to 12590. [2021-06-12 22:19:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12590 states, 12589 states have (on average 3.850663277464453) internal successors, (48476), 12589 states have internal predecessors, (48476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12590 states to 12590 states and 48476 transitions. [2021-06-12 22:19:36,101 INFO L78 Accepts]: Start accepts. Automaton has 12590 states and 48476 transitions. Word has length 28 [2021-06-12 22:19:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:36,101 INFO L482 AbstractCegarLoop]: Abstraction has 12590 states and 48476 transitions. [2021-06-12 22:19:36,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 12590 states and 48476 transitions. [2021-06-12 22:19:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:36,119 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:36,119 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:36,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3571 [2021-06-12 22:19:36,320 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:36,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:36,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1440150009, now seen corresponding path program 110 times [2021-06-12 22:19:36,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:36,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034197633] [2021-06-12 22:19:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:36,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:36,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034197633] [2021-06-12 22:19:36,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034197633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:36,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519386876] [2021-06-12 22:19:36,346 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:36,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:36,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:36,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:36,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:36,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519386876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:36,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:36,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-12 22:19:36,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507833727] [2021-06-12 22:19:36,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:19:36,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:19:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:19:36,444 INFO L87 Difference]: Start difference. First operand 12590 states and 48476 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:37,110 INFO L93 Difference]: Finished difference Result 20868 states and 74696 transitions. [2021-06-12 22:19:37,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 22:19:37,110 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:37,146 INFO L225 Difference]: With dead ends: 20868 [2021-06-12 22:19:37,146 INFO L226 Difference]: Without dead ends: 20868 [2021-06-12 22:19:37,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 22:19:37,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20868 states. [2021-06-12 22:19:37,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20868 to 12606. [2021-06-12 22:19:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12606 states, 12605 states have (on average 3.8476001586671957) internal successors, (48499), 12605 states have internal predecessors, (48499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:37,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12606 states to 12606 states and 48499 transitions. [2021-06-12 22:19:37,448 INFO L78 Accepts]: Start accepts. Automaton has 12606 states and 48499 transitions. Word has length 28 [2021-06-12 22:19:37,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:37,448 INFO L482 AbstractCegarLoop]: Abstraction has 12606 states and 48499 transitions. [2021-06-12 22:19:37,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:37,448 INFO L276 IsEmpty]: Start isEmpty. Operand 12606 states and 48499 transitions. [2021-06-12 22:19:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:37,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:37,467 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:37,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3572 [2021-06-12 22:19:37,667 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:37,667 INFO L82 PathProgramCache]: Analyzing trace with hash -373053407, now seen corresponding path program 78 times [2021-06-12 22:19:37,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:37,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427278278] [2021-06-12 22:19:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:37,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:37,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427278278] [2021-06-12 22:19:37,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427278278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:37,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505505339] [2021-06-12 22:19:37,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:37,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 22:19:37,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:37,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:37,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:37,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505505339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:37,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:37,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:19:37,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936295757] [2021-06-12 22:19:37,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:19:37,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:37,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:19:37,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:19:37,806 INFO L87 Difference]: Start difference. First operand 12606 states and 48499 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:38,676 INFO L93 Difference]: Finished difference Result 21980 states and 80698 transitions. [2021-06-12 22:19:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 22:19:38,676 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:38,717 INFO L225 Difference]: With dead ends: 21980 [2021-06-12 22:19:38,717 INFO L226 Difference]: Without dead ends: 21976 [2021-06-12 22:19:38,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 496.8ms TimeCoverageRelationStatistics Valid=837, Invalid=2823, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 22:19:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-12 22:19:38,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 12860. [2021-06-12 22:19:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12860 states, 12859 states have (on average 3.837001322031262) internal successors, (49340), 12859 states have internal predecessors, (49340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12860 states to 12860 states and 49340 transitions. [2021-06-12 22:19:39,127 INFO L78 Accepts]: Start accepts. Automaton has 12860 states and 49340 transitions. Word has length 28 [2021-06-12 22:19:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:39,127 INFO L482 AbstractCegarLoop]: Abstraction has 12860 states and 49340 transitions. [2021-06-12 22:19:39,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 12860 states and 49340 transitions. [2021-06-12 22:19:39,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:39,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:39,145 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:39,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3573 [2021-06-12 22:19:39,345 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:39,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash -498610355, now seen corresponding path program 111 times [2021-06-12 22:19:39,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:39,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856682345] [2021-06-12 22:19:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:39,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:39,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856682345] [2021-06-12 22:19:39,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856682345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:39,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685609254] [2021-06-12 22:19:39,375 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:39,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:19:39,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:39,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:39,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:39,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685609254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:39,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:39,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:19:39,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252493643] [2021-06-12 22:19:39,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:19:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:19:39,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:19:39,465 INFO L87 Difference]: Start difference. First operand 12860 states and 49340 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:40,047 INFO L93 Difference]: Finished difference Result 18670 states and 68341 transitions. [2021-06-12 22:19:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 22:19:40,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:40,081 INFO L225 Difference]: With dead ends: 18670 [2021-06-12 22:19:40,081 INFO L226 Difference]: Without dead ends: 18647 [2021-06-12 22:19:40,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 22:19:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18647 states. [2021-06-12 22:19:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18647 to 13152. [2021-06-12 22:19:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13152 states, 13151 states have (on average 3.854307657212379) internal successors, (50688), 13151 states have internal predecessors, (50688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13152 states to 13152 states and 50688 transitions. [2021-06-12 22:19:40,354 INFO L78 Accepts]: Start accepts. Automaton has 13152 states and 50688 transitions. Word has length 28 [2021-06-12 22:19:40,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:40,354 INFO L482 AbstractCegarLoop]: Abstraction has 13152 states and 50688 transitions. [2021-06-12 22:19:40,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:40,354 INFO L276 IsEmpty]: Start isEmpty. Operand 13152 states and 50688 transitions. [2021-06-12 22:19:40,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:40,373 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:40,373 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:40,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3574,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:40,577 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1181354685, now seen corresponding path program 112 times [2021-06-12 22:19:40,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:40,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387247693] [2021-06-12 22:19:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:40,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387247693] [2021-06-12 22:19:40,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387247693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:40,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039887243] [2021-06-12 22:19:40,607 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:40,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:40,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:40,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:40,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:40,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039887243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:40,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:40,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:19:40,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365328844] [2021-06-12 22:19:40,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:19:40,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:40,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:19:40,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:19:40,704 INFO L87 Difference]: Start difference. First operand 13152 states and 50688 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:41,374 INFO L93 Difference]: Finished difference Result 18648 states and 67382 transitions. [2021-06-12 22:19:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:19:41,374 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:41,407 INFO L225 Difference]: With dead ends: 18648 [2021-06-12 22:19:41,407 INFO L226 Difference]: Without dead ends: 18648 [2021-06-12 22:19:41,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:19:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18648 states. [2021-06-12 22:19:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18648 to 13107. [2021-06-12 22:19:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13107 states, 13106 states have (on average 3.8461010224324736) internal successors, (50407), 13106 states have internal predecessors, (50407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13107 states to 13107 states and 50407 transitions. [2021-06-12 22:19:41,712 INFO L78 Accepts]: Start accepts. Automaton has 13107 states and 50407 transitions. Word has length 28 [2021-06-12 22:19:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:41,712 INFO L482 AbstractCegarLoop]: Abstraction has 13107 states and 50407 transitions. [2021-06-12 22:19:41,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:41,712 INFO L276 IsEmpty]: Start isEmpty. Operand 13107 states and 50407 transitions. [2021-06-12 22:19:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:41,731 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:41,731 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:41,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3575,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:41,932 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1501473149, now seen corresponding path program 113 times [2021-06-12 22:19:41,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:41,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556564460] [2021-06-12 22:19:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:41,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556564460] [2021-06-12 22:19:41,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556564460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:41,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356840466] [2021-06-12 22:19:41,975 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:42,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 22:19:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:42,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:42,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:42,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356840466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:42,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:42,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 22:19:42,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988746738] [2021-06-12 22:19:42,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:19:42,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:42,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:19:42,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:19:42,069 INFO L87 Difference]: Start difference. First operand 13107 states and 50407 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:42,674 INFO L93 Difference]: Finished difference Result 19972 states and 72578 transitions. [2021-06-12 22:19:42,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:19:42,675 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:42,710 INFO L225 Difference]: With dead ends: 19972 [2021-06-12 22:19:42,711 INFO L226 Difference]: Without dead ends: 19972 [2021-06-12 22:19:42,711 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 340.5ms TimeCoverageRelationStatistics Valid=505, Invalid=1301, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:19:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19972 states. [2021-06-12 22:19:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19972 to 13820. [2021-06-12 22:19:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13820 states, 13819 states have (on average 3.832259931977712) internal successors, (52958), 13819 states have internal predecessors, (52958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:42,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13820 states to 13820 states and 52958 transitions. [2021-06-12 22:19:42,989 INFO L78 Accepts]: Start accepts. Automaton has 13820 states and 52958 transitions. Word has length 28 [2021-06-12 22:19:42,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:42,990 INFO L482 AbstractCegarLoop]: Abstraction has 13820 states and 52958 transitions. [2021-06-12 22:19:42,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:42,990 INFO L276 IsEmpty]: Start isEmpty. Operand 13820 states and 52958 transitions. [2021-06-12 22:19:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:43,009 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:43,009 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:43,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3576,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:43,209 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:43,209 INFO L82 PathProgramCache]: Analyzing trace with hash -612070185, now seen corresponding path program 114 times [2021-06-12 22:19:43,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:43,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539895424] [2021-06-12 22:19:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:43,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:43,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539895424] [2021-06-12 22:19:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539895424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:43,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434808260] [2021-06-12 22:19:43,240 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:43,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:19:43,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:43,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:43,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:43,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434808260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:43,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:43,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-12 22:19:43,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386021520] [2021-06-12 22:19:43,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:19:43,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:43,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:19:43,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:19:43,345 INFO L87 Difference]: Start difference. First operand 13820 states and 52958 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:44,158 INFO L93 Difference]: Finished difference Result 22381 states and 80178 transitions. [2021-06-12 22:19:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:19:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:44,198 INFO L225 Difference]: With dead ends: 22381 [2021-06-12 22:19:44,198 INFO L226 Difference]: Without dead ends: 22381 [2021-06-12 22:19:44,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 445.1ms TimeCoverageRelationStatistics Valid=698, Invalid=1752, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 22:19:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22381 states. [2021-06-12 22:19:44,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22381 to 14048. [2021-06-12 22:19:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14048 states, 14047 states have (on average 3.843881255784153) internal successors, (53995), 14047 states have internal predecessors, (53995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 53995 transitions. [2021-06-12 22:19:44,490 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 53995 transitions. Word has length 28 [2021-06-12 22:19:44,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:44,490 INFO L482 AbstractCegarLoop]: Abstraction has 14048 states and 53995 transitions. [2021-06-12 22:19:44,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 53995 transitions. [2021-06-12 22:19:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:44,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:44,510 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:44,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:44,710 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:44,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1934603223, now seen corresponding path program 79 times [2021-06-12 22:19:44,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:44,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892712274] [2021-06-12 22:19:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:44,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:44,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892712274] [2021-06-12 22:19:44,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892712274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:44,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098844131] [2021-06-12 22:19:44,744 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:44,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:44,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:44,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:44,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098844131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:44,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:44,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:19:44,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257483577] [2021-06-12 22:19:44,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:44,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:44,862 INFO L87 Difference]: Start difference. First operand 14048 states and 53995 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:46,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:46,250 INFO L93 Difference]: Finished difference Result 39001 states and 140171 transitions. [2021-06-12 22:19:46,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:19:46,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:46,330 INFO L225 Difference]: With dead ends: 39001 [2021-06-12 22:19:46,330 INFO L226 Difference]: Without dead ends: 39001 [2021-06-12 22:19:46,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 838.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:19:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39001 states. [2021-06-12 22:19:46,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39001 to 15286. [2021-06-12 22:19:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15286 states, 15285 states have (on average 3.890677134445535) internal successors, (59469), 15285 states have internal predecessors, (59469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15286 states to 15286 states and 59469 transitions. [2021-06-12 22:19:46,864 INFO L78 Accepts]: Start accepts. Automaton has 15286 states and 59469 transitions. Word has length 28 [2021-06-12 22:19:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:46,864 INFO L482 AbstractCegarLoop]: Abstraction has 15286 states and 59469 transitions. [2021-06-12 22:19:46,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 15286 states and 59469 transitions. [2021-06-12 22:19:46,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:46,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:46,887 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:47,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3578,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:47,087 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:47,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:47,088 INFO L82 PathProgramCache]: Analyzing trace with hash -405698579, now seen corresponding path program 80 times [2021-06-12 22:19:47,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:47,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704019470] [2021-06-12 22:19:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:47,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704019470] [2021-06-12 22:19:47,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704019470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49530677] [2021-06-12 22:19:47,121 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:47,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:47,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:47,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:47,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:47,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49530677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:47,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:47,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:19:47,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294407714] [2021-06-12 22:19:47,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:47,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:47,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:47,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:47,242 INFO L87 Difference]: Start difference. First operand 15286 states and 59469 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:48,644 INFO L93 Difference]: Finished difference Result 38023 states and 137597 transitions. [2021-06-12 22:19:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:19:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:48,721 INFO L225 Difference]: With dead ends: 38023 [2021-06-12 22:19:48,721 INFO L226 Difference]: Without dead ends: 38023 [2021-06-12 22:19:48,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 846.8ms TimeCoverageRelationStatistics Valid=1532, Invalid=5608, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 22:19:48,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38023 states. [2021-06-12 22:19:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38023 to 15260. [2021-06-12 22:19:49,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15260 states, 15259 states have (on average 3.8870830329641524) internal successors, (59313), 15259 states have internal predecessors, (59313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15260 states to 15260 states and 59313 transitions. [2021-06-12 22:19:49,267 INFO L78 Accepts]: Start accepts. Automaton has 15260 states and 59313 transitions. Word has length 28 [2021-06-12 22:19:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:49,267 INFO L482 AbstractCegarLoop]: Abstraction has 15260 states and 59313 transitions. [2021-06-12 22:19:49,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 15260 states and 59313 transitions. [2021-06-12 22:19:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:49,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:49,288 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:49,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3579 [2021-06-12 22:19:49,489 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:49,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:49,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1649877491, now seen corresponding path program 115 times [2021-06-12 22:19:49,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:49,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85363198] [2021-06-12 22:19:49,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:49,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:49,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85363198] [2021-06-12 22:19:49,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85363198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:49,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37260330] [2021-06-12 22:19:49,522 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:49,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:49,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:49,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:49,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37260330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:49,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:49,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:19:49,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665505462] [2021-06-12 22:19:49,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:19:49,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:49,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:19:49,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:19:49,598 INFO L87 Difference]: Start difference. First operand 15260 states and 59313 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:49,869 INFO L93 Difference]: Finished difference Result 23613 states and 90414 transitions. [2021-06-12 22:19:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 22:19:49,870 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:49,916 INFO L225 Difference]: With dead ends: 23613 [2021-06-12 22:19:49,916 INFO L226 Difference]: Without dead ends: 23563 [2021-06-12 22:19:49,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-12 22:19:49,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23563 states. [2021-06-12 22:19:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23563 to 20372. [2021-06-12 22:19:50,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20372 states, 20371 states have (on average 3.902803004270777) internal successors, (79504), 20371 states have internal predecessors, (79504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20372 states to 20372 states and 79504 transitions. [2021-06-12 22:19:50,430 INFO L78 Accepts]: Start accepts. Automaton has 20372 states and 79504 transitions. Word has length 28 [2021-06-12 22:19:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:50,430 INFO L482 AbstractCegarLoop]: Abstraction has 20372 states and 79504 transitions. [2021-06-12 22:19:50,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 20372 states and 79504 transitions. [2021-06-12 22:19:50,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:50,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:50,476 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:50,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3580 [2021-06-12 22:19:50,776 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:50,777 INFO L82 PathProgramCache]: Analyzing trace with hash 260189251, now seen corresponding path program 116 times [2021-06-12 22:19:50,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:50,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759775575] [2021-06-12 22:19:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:50,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:50,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759775575] [2021-06-12 22:19:50,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759775575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:50,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194477199] [2021-06-12 22:19:50,818 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:50,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:19:50,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:50,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:19:50,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:50,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194477199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:50,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:50,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 22:19:50,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057439672] [2021-06-12 22:19:50,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:19:50,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:50,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:19:50,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:19:50,904 INFO L87 Difference]: Start difference. First operand 20372 states and 79504 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:51,161 INFO L93 Difference]: Finished difference Result 23123 states and 87862 transitions. [2021-06-12 22:19:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:19:51,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:51,210 INFO L225 Difference]: With dead ends: 23123 [2021-06-12 22:19:51,211 INFO L226 Difference]: Without dead ends: 23123 [2021-06-12 22:19:51,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:19:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23123 states. [2021-06-12 22:19:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23123 to 19875. [2021-06-12 22:19:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19874 states have (on average 3.891114018315387) internal successors, (77332), 19874 states have internal predecessors, (77332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 77332 transitions. [2021-06-12 22:19:51,649 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 77332 transitions. Word has length 28 [2021-06-12 22:19:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:51,649 INFO L482 AbstractCegarLoop]: Abstraction has 19875 states and 77332 transitions. [2021-06-12 22:19:51,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 77332 transitions. [2021-06-12 22:19:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:51,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:51,677 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:51,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3581 [2021-06-12 22:19:51,880 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash -691492187, now seen corresponding path program 117 times [2021-06-12 22:19:51,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:51,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205575565] [2021-06-12 22:19:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:51,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:51,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205575565] [2021-06-12 22:19:51,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205575565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:51,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357715033] [2021-06-12 22:19:51,916 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:51,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:19:51,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:51,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:51,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:52,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357715033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:52,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:52,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-06-12 22:19:52,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231877774] [2021-06-12 22:19:52,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:19:52,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:52,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:19:52,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:19:52,113 INFO L87 Difference]: Start difference. First operand 19875 states and 77332 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-06-12 22:19:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:53,025 INFO L93 Difference]: Finished difference Result 31643 states and 117215 transitions. [2021-06-12 22:19:53,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:19:53,025 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 28 [2021-06-12 22:19:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:53,090 INFO L225 Difference]: With dead ends: 31643 [2021-06-12 22:19:53,090 INFO L226 Difference]: Without dead ends: 31643 [2021-06-12 22:19:53,091 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=720, Invalid=2472, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 22:19:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31643 states. [2021-06-12 22:19:53,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31643 to 19937. [2021-06-12 22:19:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19937 states, 19936 states have (on average 3.889446227929374) internal successors, (77540), 19936 states have internal predecessors, (77540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19937 states to 19937 states and 77540 transitions. [2021-06-12 22:19:53,534 INFO L78 Accepts]: Start accepts. Automaton has 19937 states and 77540 transitions. Word has length 28 [2021-06-12 22:19:53,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:53,534 INFO L482 AbstractCegarLoop]: Abstraction has 19937 states and 77540 transitions. [2021-06-12 22:19:53,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-06-12 22:19:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 19937 states and 77540 transitions. [2021-06-12 22:19:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:53,561 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:53,561 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:53,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3582 [2021-06-12 22:19:53,761 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1667811031, now seen corresponding path program 118 times [2021-06-12 22:19:53,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:53,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307263662] [2021-06-12 22:19:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:53,797 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:53,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:53,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307263662] [2021-06-12 22:19:53,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307263662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:53,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314184957] [2021-06-12 22:19:53,797 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:53,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:19:53,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:53,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:53,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:53,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:53,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314184957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:53,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:53,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:19:53,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637361269] [2021-06-12 22:19:53,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:53,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:53,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:53,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:53,910 INFO L87 Difference]: Start difference. First operand 19937 states and 77540 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:55,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:55,366 INFO L93 Difference]: Finished difference Result 40452 states and 148213 transitions. [2021-06-12 22:19:55,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-12 22:19:55,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:55,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:55,450 INFO L225 Difference]: With dead ends: 40452 [2021-06-12 22:19:55,450 INFO L226 Difference]: Without dead ends: 40452 [2021-06-12 22:19:55,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3102 ImplicationChecksByTransitivity, 829.8ms TimeCoverageRelationStatistics Valid=1548, Invalid=6284, Unknown=0, NotChecked=0, Total=7832 [2021-06-12 22:19:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40452 states. [2021-06-12 22:19:55,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40452 to 19942. [2021-06-12 22:19:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19942 states, 19941 states have (on average 3.891530013539943) internal successors, (77601), 19941 states have internal predecessors, (77601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19942 states to 19942 states and 77601 transitions. [2021-06-12 22:19:56,023 INFO L78 Accepts]: Start accepts. Automaton has 19942 states and 77601 transitions. Word has length 28 [2021-06-12 22:19:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:56,023 INFO L482 AbstractCegarLoop]: Abstraction has 19942 states and 77601 transitions. [2021-06-12 22:19:56,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 19942 states and 77601 transitions. [2021-06-12 22:19:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:56,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:56,052 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:56,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3583,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:56,256 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:56,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:56,256 INFO L82 PathProgramCache]: Analyzing trace with hash -138906387, now seen corresponding path program 119 times [2021-06-12 22:19:56,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:56,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364018693] [2021-06-12 22:19:56,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:19:56,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:56,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364018693] [2021-06-12 22:19:56,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364018693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:56,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139662142] [2021-06-12 22:19:56,292 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:56,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:19:56,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:56,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:19:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:56,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139662142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:56,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:56,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-12 22:19:56,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025136136] [2021-06-12 22:19:56,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:19:56,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:56,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:19:56,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:19:56,405 INFO L87 Difference]: Start difference. First operand 19942 states and 77601 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:57,959 INFO L93 Difference]: Finished difference Result 40013 states and 147353 transitions. [2021-06-12 22:19:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 22:19:57,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:57,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:58,044 INFO L225 Difference]: With dead ends: 40013 [2021-06-12 22:19:58,044 INFO L226 Difference]: Without dead ends: 40013 [2021-06-12 22:19:58,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2992 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=1515, Invalid=6141, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 22:19:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40013 states. [2021-06-12 22:19:58,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40013 to 19730. [2021-06-12 22:19:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19730 states, 19729 states have (on average 3.8836230929089157) internal successors, (76620), 19729 states have internal predecessors, (76620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19730 states to 19730 states and 76620 transitions. [2021-06-12 22:19:58,646 INFO L78 Accepts]: Start accepts. Automaton has 19730 states and 76620 transitions. Word has length 28 [2021-06-12 22:19:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:58,646 INFO L482 AbstractCegarLoop]: Abstraction has 19730 states and 76620 transitions. [2021-06-12 22:19:58,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:58,646 INFO L276 IsEmpty]: Start isEmpty. Operand 19730 states and 76620 transitions. [2021-06-12 22:19:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:58,675 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:58,675 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:19:58,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3584 [2021-06-12 22:19:58,875 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:19:58,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:19:58,875 INFO L82 PathProgramCache]: Analyzing trace with hash -164720279, now seen corresponding path program 120 times [2021-06-12 22:19:58,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:19:58,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69634964] [2021-06-12 22:19:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:19:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:19:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:19:58,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:19:58,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69634964] [2021-06-12 22:19:58,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69634964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571083588] [2021-06-12 22:19:58,903 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:19:58,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:19:58,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:19:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:19:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:19:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:19:58,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571083588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:19:58,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:19:58,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:19:58,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313907269] [2021-06-12 22:19:58,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:19:58,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:19:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:19:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:19:58,981 INFO L87 Difference]: Start difference. First operand 19730 states and 76620 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:59,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:19:59,234 INFO L93 Difference]: Finished difference Result 29201 states and 109016 transitions. [2021-06-12 22:19:59,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 22:19:59,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:19:59,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:19:59,295 INFO L225 Difference]: With dead ends: 29201 [2021-06-12 22:19:59,296 INFO L226 Difference]: Without dead ends: 29184 [2021-06-12 22:19:59,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-06-12 22:19:59,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29184 states. [2021-06-12 22:19:59,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29184 to 19998. [2021-06-12 22:19:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19998 states, 19997 states have (on average 3.889183377506626) internal successors, (77772), 19997 states have internal predecessors, (77772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19998 states to 19998 states and 77772 transitions. [2021-06-12 22:19:59,818 INFO L78 Accepts]: Start accepts. Automaton has 19998 states and 77772 transitions. Word has length 28 [2021-06-12 22:19:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:19:59,818 INFO L482 AbstractCegarLoop]: Abstraction has 19998 states and 77772 transitions. [2021-06-12 22:19:59,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:19:59,818 INFO L276 IsEmpty]: Start isEmpty. Operand 19998 states and 77772 transitions. [2021-06-12 22:19:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:19:59,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:19:59,846 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:00,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3585,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:00,046 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1307646319, now seen corresponding path program 121 times [2021-06-12 22:20:00,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:00,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083722109] [2021-06-12 22:20:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:00,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083722109] [2021-06-12 22:20:00,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083722109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204958385] [2021-06-12 22:20:00,083 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:00,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:20:00,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:20:00,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204958385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:00,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:00,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-12 22:20:00,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612400953] [2021-06-12 22:20:00,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:20:00,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:00,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:20:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:20:00,283 INFO L87 Difference]: Start difference. First operand 19998 states and 77772 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:00,543 INFO L93 Difference]: Finished difference Result 30984 states and 114572 transitions. [2021-06-12 22:20:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 22:20:00,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:00,607 INFO L225 Difference]: With dead ends: 30984 [2021-06-12 22:20:00,607 INFO L226 Difference]: Without dead ends: 30984 [2021-06-12 22:20:00,608 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-06-12 22:20:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30984 states. [2021-06-12 22:20:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30984 to 19667. [2021-06-12 22:20:01,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19667 states, 19666 states have (on average 3.8739957286687683) internal successors, (76186), 19666 states have internal predecessors, (76186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19667 states to 19667 states and 76186 transitions. [2021-06-12 22:20:01,117 INFO L78 Accepts]: Start accepts. Automaton has 19667 states and 76186 transitions. Word has length 28 [2021-06-12 22:20:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:01,118 INFO L482 AbstractCegarLoop]: Abstraction has 19667 states and 76186 transitions. [2021-06-12 22:20:01,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 19667 states and 76186 transitions. [2021-06-12 22:20:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:01,149 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:01,149 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:01,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:01,350 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:01,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1640639411, now seen corresponding path program 122 times [2021-06-12 22:20:01,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:01,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645605614] [2021-06-12 22:20:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:01,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:01,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645605614] [2021-06-12 22:20:01,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645605614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:01,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111921210] [2021-06-12 22:20:01,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:01,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:01,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:01,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:01,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:01,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111921210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:01,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:01,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:20:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256116548] [2021-06-12 22:20:01,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:20:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:20:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:20:01,492 INFO L87 Difference]: Start difference. First operand 19667 states and 76186 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:02,299 INFO L93 Difference]: Finished difference Result 29160 states and 108410 transitions. [2021-06-12 22:20:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 22:20:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:02,372 INFO L225 Difference]: With dead ends: 29160 [2021-06-12 22:20:02,372 INFO L226 Difference]: Without dead ends: 29160 [2021-06-12 22:20:02,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 417.9ms TimeCoverageRelationStatistics Valid=589, Invalid=1961, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 22:20:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29160 states. [2021-06-12 22:20:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29160 to 19711. [2021-06-12 22:20:02,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19711 states, 19710 states have (on average 3.8728564180618976) internal successors, (76334), 19710 states have internal predecessors, (76334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19711 states to 19711 states and 76334 transitions. [2021-06-12 22:20:03,015 INFO L78 Accepts]: Start accepts. Automaton has 19711 states and 76334 transitions. Word has length 28 [2021-06-12 22:20:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:03,015 INFO L482 AbstractCegarLoop]: Abstraction has 19711 states and 76334 transitions. [2021-06-12 22:20:03,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 19711 states and 76334 transitions. [2021-06-12 22:20:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:03,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:03,043 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:03,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3587,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:03,244 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1869413791, now seen corresponding path program 123 times [2021-06-12 22:20:03,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:03,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140026790] [2021-06-12 22:20:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:03,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:03,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140026790] [2021-06-12 22:20:03,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140026790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:03,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790435569] [2021-06-12 22:20:03,279 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:03,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:20:03,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:03,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:03,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790435569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:03,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:03,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:20:03,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496689119] [2021-06-12 22:20:03,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:20:03,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:03,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:20:03,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:20:03,377 INFO L87 Difference]: Start difference. First operand 19711 states and 76334 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:04,396 INFO L93 Difference]: Finished difference Result 30658 states and 112697 transitions. [2021-06-12 22:20:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 22:20:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:04,461 INFO L225 Difference]: With dead ends: 30658 [2021-06-12 22:20:04,461 INFO L226 Difference]: Without dead ends: 30658 [2021-06-12 22:20:04,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=928, Invalid=3494, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 22:20:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30658 states. [2021-06-12 22:20:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30658 to 20243. [2021-06-12 22:20:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20243 states, 20242 states have (on average 3.8518921055231696) internal successors, (77970), 20242 states have internal predecessors, (77970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20243 states to 20243 states and 77970 transitions. [2021-06-12 22:20:05,014 INFO L78 Accepts]: Start accepts. Automaton has 20243 states and 77970 transitions. Word has length 28 [2021-06-12 22:20:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:05,014 INFO L482 AbstractCegarLoop]: Abstraction has 20243 states and 77970 transitions. [2021-06-12 22:20:05,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 20243 states and 77970 transitions. [2021-06-12 22:20:05,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:05,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:05,044 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:05,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3588,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:05,251 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:05,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:05,252 INFO L82 PathProgramCache]: Analyzing trace with hash -923294047, now seen corresponding path program 124 times [2021-06-12 22:20:05,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:05,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440445586] [2021-06-12 22:20:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:05,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:05,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440445586] [2021-06-12 22:20:05,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440445586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:05,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32391595] [2021-06-12 22:20:05,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:05,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:05,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:05,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:05,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32391595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:05,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:05,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-12 22:20:05,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226080508] [2021-06-12 22:20:05,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:20:05,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:20:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:20:05,387 INFO L87 Difference]: Start difference. First operand 20243 states and 77970 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:06,340 INFO L93 Difference]: Finished difference Result 29767 states and 110352 transitions. [2021-06-12 22:20:06,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:20:06,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:06,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:06,401 INFO L225 Difference]: With dead ends: 29767 [2021-06-12 22:20:06,402 INFO L226 Difference]: Without dead ends: 29763 [2021-06-12 22:20:06,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=736, Invalid=2570, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:20:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29763 states. [2021-06-12 22:20:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29763 to 20135. [2021-06-12 22:20:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20135 states, 20134 states have (on average 3.854773020760902) internal successors, (77612), 20134 states have internal predecessors, (77612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20135 states to 20135 states and 77612 transitions. [2021-06-12 22:20:06,924 INFO L78 Accepts]: Start accepts. Automaton has 20135 states and 77612 transitions. Word has length 28 [2021-06-12 22:20:06,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:06,924 INFO L482 AbstractCegarLoop]: Abstraction has 20135 states and 77612 transitions. [2021-06-12 22:20:06,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 20135 states and 77612 transitions. [2021-06-12 22:20:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:06,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:06,951 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:07,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3589,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:07,157 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1048850995, now seen corresponding path program 125 times [2021-06-12 22:20:07,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:07,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784113819] [2021-06-12 22:20:07,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:07,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:07,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:07,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784113819] [2021-06-12 22:20:07,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784113819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:07,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787836926] [2021-06-12 22:20:07,196 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:07,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:20:07,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:07,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:20:07,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 22:20:07,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787836926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:07,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:07,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-12 22:20:07,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562114897] [2021-06-12 22:20:07,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:20:07,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:07,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:20:07,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:20:07,285 INFO L87 Difference]: Start difference. First operand 20135 states and 77612 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-12 22:20:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:07,513 INFO L93 Difference]: Finished difference Result 25115 states and 93450 transitions. [2021-06-12 22:20:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 22:20:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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 28 [2021-06-12 22:20:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:07,567 INFO L225 Difference]: With dead ends: 25115 [2021-06-12 22:20:07,567 INFO L226 Difference]: Without dead ends: 25115 [2021-06-12 22:20:07,568 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:20:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25115 states. [2021-06-12 22:20:07,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25115 to 20445. [2021-06-12 22:20:07,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20444 states have (on average 3.845871649383682) internal successors, (78625), 20444 states have internal predecessors, (78625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 78625 transitions. [2021-06-12 22:20:08,029 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 78625 transitions. Word has length 28 [2021-06-12 22:20:08,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:08,030 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 78625 transitions. [2021-06-12 22:20:08,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-06-12 22:20:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 78625 transitions. [2021-06-12 22:20:08,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:08,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:08,064 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:08,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3590 [2021-06-12 22:20:08,264 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:08,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:08,264 INFO L82 PathProgramCache]: Analyzing trace with hash -118651251, now seen corresponding path program 126 times [2021-06-12 22:20:08,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:08,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787742626] [2021-06-12 22:20:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:08,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:08,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787742626] [2021-06-12 22:20:08,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787742626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:08,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323512769] [2021-06-12 22:20:08,300 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:08,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:20:08,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:08,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:08,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:20:08,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323512769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:08,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:08,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:20:08,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612221029] [2021-06-12 22:20:08,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:20:08,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:08,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:20:08,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:20:08,385 INFO L87 Difference]: Start difference. First operand 20445 states and 78625 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:20:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:09,267 INFO L93 Difference]: Finished difference Result 30869 states and 113082 transitions. [2021-06-12 22:20:09,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 22:20:09,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:20:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:09,331 INFO L225 Difference]: With dead ends: 30869 [2021-06-12 22:20:09,332 INFO L226 Difference]: Without dead ends: 30869 [2021-06-12 22:20:09,332 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=684, Invalid=2396, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 22:20:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30869 states. [2021-06-12 22:20:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30869 to 22051. [2021-06-12 22:20:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22051 states, 22050 states have (on average 3.8592743764172335) internal successors, (85097), 22050 states have internal predecessors, (85097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22051 states to 22051 states and 85097 transitions. [2021-06-12 22:20:09,936 INFO L78 Accepts]: Start accepts. Automaton has 22051 states and 85097 transitions. Word has length 28 [2021-06-12 22:20:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:09,936 INFO L482 AbstractCegarLoop]: Abstraction has 22051 states and 85097 transitions. [2021-06-12 22:20:09,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:20:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 22051 states and 85097 transitions. [2021-06-12 22:20:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:09,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:09,966 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:10,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3591 [2021-06-12 22:20:10,167 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:10,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:10,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1808445805, now seen corresponding path program 127 times [2021-06-12 22:20:10,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:10,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578224978] [2021-06-12 22:20:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:10,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:10,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578224978] [2021-06-12 22:20:10,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578224978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:10,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843320026] [2021-06-12 22:20:10,202 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:10,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:10,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 22:20:10,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843320026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:10,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:10,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-12 22:20:10,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115845595] [2021-06-12 22:20:10,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:20:10,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:10,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:20:10,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:20:10,283 INFO L87 Difference]: Start difference. First operand 22051 states and 85097 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:20:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:10,912 INFO L93 Difference]: Finished difference Result 29083 states and 108458 transitions. [2021-06-12 22:20:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:20:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 28 [2021-06-12 22:20:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:10,972 INFO L225 Difference]: With dead ends: 29083 [2021-06-12 22:20:10,972 INFO L226 Difference]: Without dead ends: 29071 [2021-06-12 22:20:10,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 22:20:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29071 states. [2021-06-12 22:20:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29071 to 22169. [2021-06-12 22:20:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22169 states, 22168 states have (on average 3.854655359076146) internal successors, (85450), 22168 states have internal predecessors, (85450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22169 states to 22169 states and 85450 transitions. [2021-06-12 22:20:11,627 INFO L78 Accepts]: Start accepts. Automaton has 22169 states and 85450 transitions. Word has length 28 [2021-06-12 22:20:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:11,627 INFO L482 AbstractCegarLoop]: Abstraction has 22169 states and 85450 transitions. [2021-06-12 22:20:11,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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) [2021-06-12 22:20:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 22169 states and 85450 transitions. [2021-06-12 22:20:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:11,657 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:11,657 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:11,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3592 [2021-06-12 22:20:11,857 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1705760401, now seen corresponding path program 128 times [2021-06-12 22:20:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:11,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121721521] [2021-06-12 22:20:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:11,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:11,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121721521] [2021-06-12 22:20:11,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121721521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:11,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707300990] [2021-06-12 22:20:11,885 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:11,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:11,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 22:20:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:11,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:11,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707300990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:11,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:11,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-12 22:20:11,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285975940] [2021-06-12 22:20:11,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 22:20:11,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:11,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 22:20:11,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-12 22:20:11,959 INFO L87 Difference]: Start difference. First operand 22169 states and 85450 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:12,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:12,190 INFO L93 Difference]: Finished difference Result 25428 states and 96407 transitions. [2021-06-12 22:20:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 22:20:12,190 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:12,246 INFO L225 Difference]: With dead ends: 25428 [2021-06-12 22:20:12,246 INFO L226 Difference]: Without dead ends: 25428 [2021-06-12 22:20:12,247 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-12 22:20:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25428 states. [2021-06-12 22:20:12,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25428 to 22972. [2021-06-12 22:20:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22972 states, 22971 states have (on average 3.84959296504288) internal successors, (88429), 22971 states have internal predecessors, (88429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 88429 transitions. [2021-06-12 22:20:12,858 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 88429 transitions. Word has length 28 [2021-06-12 22:20:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:12,858 INFO L482 AbstractCegarLoop]: Abstraction has 22972 states and 88429 transitions. [2021-06-12 22:20:12,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 88429 transitions. [2021-06-12 22:20:12,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:12,891 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:12,891 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:13,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3593 [2021-06-12 22:20:13,092 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:13,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:13,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2145545327, now seen corresponding path program 129 times [2021-06-12 22:20:13,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:13,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558532102] [2021-06-12 22:20:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:13,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:13,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558532102] [2021-06-12 22:20:13,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558532102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:13,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174910573] [2021-06-12 22:20:13,129 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:13,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:20:13,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:13,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:13,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:13,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174910573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:13,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:13,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:20:13,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594821672] [2021-06-12 22:20:13,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:20:13,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:13,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:20:13,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:20:13,225 INFO L87 Difference]: Start difference. First operand 22972 states and 88429 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:14,090 INFO L93 Difference]: Finished difference Result 30839 states and 113843 transitions. [2021-06-12 22:20:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:20:14,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:14,154 INFO L225 Difference]: With dead ends: 30839 [2021-06-12 22:20:14,154 INFO L226 Difference]: Without dead ends: 30839 [2021-06-12 22:20:14,154 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=627, Invalid=2235, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 22:20:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30839 states. [2021-06-12 22:20:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30839 to 24204. [2021-06-12 22:20:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24204 states, 24203 states have (on average 3.8153534685782753) internal successors, (92343), 24203 states have internal predecessors, (92343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24204 states to 24204 states and 92343 transitions. [2021-06-12 22:20:14,800 INFO L78 Accepts]: Start accepts. Automaton has 24204 states and 92343 transitions. Word has length 28 [2021-06-12 22:20:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:14,800 INFO L482 AbstractCegarLoop]: Abstraction has 24204 states and 92343 transitions. [2021-06-12 22:20:14,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 24204 states and 92343 transitions. [2021-06-12 22:20:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:14,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:14,837 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:15,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3594 [2021-06-12 22:20:15,037 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:15,038 INFO L82 PathProgramCache]: Analyzing trace with hash -414511489, now seen corresponding path program 130 times [2021-06-12 22:20:15,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:15,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717588701] [2021-06-12 22:20:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:15,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:15,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717588701] [2021-06-12 22:20:15,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717588701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:15,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184835433] [2021-06-12 22:20:15,072 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:15,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:15,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:15,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:15,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:15,163 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:15,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184835433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:15,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:15,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:20:15,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969771429] [2021-06-12 22:20:15,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:20:15,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:20:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:20:15,164 INFO L87 Difference]: Start difference. First operand 24204 states and 92343 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:15,747 INFO L93 Difference]: Finished difference Result 29939 states and 111457 transitions. [2021-06-12 22:20:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:20:15,748 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:15,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:15,810 INFO L225 Difference]: With dead ends: 29939 [2021-06-12 22:20:15,810 INFO L226 Difference]: Without dead ends: 29931 [2021-06-12 22:20:15,811 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 22:20:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29931 states. [2021-06-12 22:20:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29931 to 24026. [2021-06-12 22:20:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24026 states, 24025 states have (on average 3.821685744016649) internal successors, (91816), 24025 states have internal predecessors, (91816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24026 states to 24026 states and 91816 transitions. [2021-06-12 22:20:16,472 INFO L78 Accepts]: Start accepts. Automaton has 24026 states and 91816 transitions. Word has length 28 [2021-06-12 22:20:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:16,472 INFO L482 AbstractCegarLoop]: Abstraction has 24026 states and 91816 transitions. [2021-06-12 22:20:16,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 24026 states and 91816 transitions. [2021-06-12 22:20:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:16,510 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:16,510 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:16,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-12 22:20:16,710 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 44544553, now seen corresponding path program 131 times [2021-06-12 22:20:16,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:16,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753249707] [2021-06-12 22:20:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:16,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:16,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753249707] [2021-06-12 22:20:16,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753249707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:16,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836218110] [2021-06-12 22:20:16,741 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:16,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:20:16,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:16,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:16,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:16,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836218110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:16,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:16,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:20:16,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726056418] [2021-06-12 22:20:16,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:20:16,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:16,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:20:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:20:16,824 INFO L87 Difference]: Start difference. First operand 24026 states and 91816 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:17,533 INFO L93 Difference]: Finished difference Result 31774 states and 117062 transitions. [2021-06-12 22:20:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 22:20:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:17,600 INFO L225 Difference]: With dead ends: 31774 [2021-06-12 22:20:17,600 INFO L226 Difference]: Without dead ends: 31774 [2021-06-12 22:20:17,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 372.7ms TimeCoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 22:20:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31774 states. [2021-06-12 22:20:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31774 to 25062. [2021-06-12 22:20:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25062 states, 25061 states have (on average 3.796416743146722) internal successors, (95142), 25061 states have internal predecessors, (95142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25062 states to 25062 states and 95142 transitions. [2021-06-12 22:20:18,320 INFO L78 Accepts]: Start accepts. Automaton has 25062 states and 95142 transitions. Word has length 28 [2021-06-12 22:20:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:18,320 INFO L482 AbstractCegarLoop]: Abstraction has 25062 states and 95142 transitions. [2021-06-12 22:20:18,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 25062 states and 95142 transitions. [2021-06-12 22:20:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:18,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:18,363 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:18,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3596,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:18,563 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:18,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1038478103, now seen corresponding path program 132 times [2021-06-12 22:20:18,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:18,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497596352] [2021-06-12 22:20:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:18,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497596352] [2021-06-12 22:20:18,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497596352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43847126] [2021-06-12 22:20:18,598 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:18,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 22:20:18,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:18,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:20:18,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:18,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43847126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:18,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:18,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:20:18,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273873638] [2021-06-12 22:20:18,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:20:18,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:18,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:20:18,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:20:18,692 INFO L87 Difference]: Start difference. First operand 25062 states and 95142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:19,103 INFO L93 Difference]: Finished difference Result 30731 states and 115778 transitions. [2021-06-12 22:20:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:20:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:19,177 INFO L225 Difference]: With dead ends: 30731 [2021-06-12 22:20:19,177 INFO L226 Difference]: Without dead ends: 30718 [2021-06-12 22:20:19,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:20:19,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30718 states. [2021-06-12 22:20:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30718 to 29185. [2021-06-12 22:20:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29185 states, 29184 states have (on average 3.8150356359649122) internal successors, (111338), 29184 states have internal predecessors, (111338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:19,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29185 states to 29185 states and 111338 transitions. [2021-06-12 22:20:19,851 INFO L78 Accepts]: Start accepts. Automaton has 29185 states and 111338 transitions. Word has length 28 [2021-06-12 22:20:19,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:19,851 INFO L482 AbstractCegarLoop]: Abstraction has 29185 states and 111338 transitions. [2021-06-12 22:20:19,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:19,851 INFO L276 IsEmpty]: Start isEmpty. Operand 29185 states and 111338 transitions. [2021-06-12 22:20:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:19,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:19,894 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:20,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3597,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:20,095 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:20,095 INFO L82 PathProgramCache]: Analyzing trace with hash 432600015, now seen corresponding path program 133 times [2021-06-12 22:20:20,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:20,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853732302] [2021-06-12 22:20:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:20,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:20,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853732302] [2021-06-12 22:20:20,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853732302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:20,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722669596] [2021-06-12 22:20:20,127 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:20:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:20,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722669596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:20,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:20,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:20:20,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948535771] [2021-06-12 22:20:20,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:20:20,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:20:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:20:20,198 INFO L87 Difference]: Start difference. First operand 29185 states and 111338 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:20,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:20,657 INFO L93 Difference]: Finished difference Result 32194 states and 120690 transitions. [2021-06-12 22:20:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 22:20:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:20,723 INFO L225 Difference]: With dead ends: 32194 [2021-06-12 22:20:20,723 INFO L226 Difference]: Without dead ends: 32194 [2021-06-12 22:20:20,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 22:20:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32194 states. [2021-06-12 22:20:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32194 to 28930. [2021-06-12 22:20:21,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28930 states, 28929 states have (on average 3.8113657575443325) internal successors, (110259), 28929 states have internal predecessors, (110259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28930 states to 28930 states and 110259 transitions. [2021-06-12 22:20:21,352 INFO L78 Accepts]: Start accepts. Automaton has 28930 states and 110259 transitions. Word has length 28 [2021-06-12 22:20:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:21,352 INFO L482 AbstractCegarLoop]: Abstraction has 28930 states and 110259 transitions. [2021-06-12 22:20:21,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 28930 states and 110259 transitions. [2021-06-12 22:20:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:21,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:21,395 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:21,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:21,595 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash 990664297, now seen corresponding path program 134 times [2021-06-12 22:20:21,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:21,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737179898] [2021-06-12 22:20:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:21,626 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:21,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:21,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737179898] [2021-06-12 22:20:21,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737179898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:21,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523498407] [2021-06-12 22:20:21,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:21,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:21,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:21,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:21,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:21,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:21,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523498407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:21,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:21,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:20:21,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205075869] [2021-06-12 22:20:21,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:20:21,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:21,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:20:21,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:20:21,705 INFO L87 Difference]: Start difference. First operand 28930 states and 110259 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:22,454 INFO L93 Difference]: Finished difference Result 35356 states and 131587 transitions. [2021-06-12 22:20:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 22:20:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:22,541 INFO L225 Difference]: With dead ends: 35356 [2021-06-12 22:20:22,541 INFO L226 Difference]: Without dead ends: 35348 [2021-06-12 22:20:22,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=354, Invalid=1286, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:20:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35348 states. [2021-06-12 22:20:23,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35348 to 28896. [2021-06-12 22:20:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28896 states, 28895 states have (on average 3.8118013497144836) internal successors, (110142), 28895 states have internal predecessors, (110142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:23,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28896 states to 28896 states and 110142 transitions. [2021-06-12 22:20:23,271 INFO L78 Accepts]: Start accepts. Automaton has 28896 states and 110142 transitions. Word has length 28 [2021-06-12 22:20:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:23,271 INFO L482 AbstractCegarLoop]: Abstraction has 28896 states and 110142 transitions. [2021-06-12 22:20:23,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 28896 states and 110142 transitions. [2021-06-12 22:20:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:23,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:23,442 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:23,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3599,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:23,643 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:23,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:23,643 INFO L82 PathProgramCache]: Analyzing trace with hash -896097405, now seen corresponding path program 135 times [2021-06-12 22:20:23,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:23,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932089738] [2021-06-12 22:20:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:23,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:23,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932089738] [2021-06-12 22:20:23,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932089738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:23,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871101109] [2021-06-12 22:20:23,675 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:23,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:20:23,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:20:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:23,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871101109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:23,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:23,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-12 22:20:23,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547746932] [2021-06-12 22:20:23,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 22:20:23,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:23,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 22:20:23,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-12 22:20:23,747 INFO L87 Difference]: Start difference. First operand 28896 states and 110142 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:24,131 INFO L93 Difference]: Finished difference Result 31746 states and 119616 transitions. [2021-06-12 22:20:24,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 22:20:24,132 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:24,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:24,303 INFO L225 Difference]: With dead ends: 31746 [2021-06-12 22:20:24,303 INFO L226 Difference]: Without dead ends: 31746 [2021-06-12 22:20:24,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2021-06-12 22:20:24,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31746 states. [2021-06-12 22:20:24,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31746 to 29428. [2021-06-12 22:20:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29428 states, 29427 states have (on average 3.81031025928569) internal successors, (112126), 29427 states have internal predecessors, (112126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29428 states to 29428 states and 112126 transitions. [2021-06-12 22:20:24,931 INFO L78 Accepts]: Start accepts. Automaton has 29428 states and 112126 transitions. Word has length 28 [2021-06-12 22:20:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:24,931 INFO L482 AbstractCegarLoop]: Abstraction has 29428 states and 112126 transitions. [2021-06-12 22:20:24,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29428 states and 112126 transitions. [2021-06-12 22:20:24,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:24,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:24,983 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:25,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3600,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:25,198 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:25,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:25,199 INFO L82 PathProgramCache]: Analyzing trace with hash 68962157, now seen corresponding path program 136 times [2021-06-12 22:20:25,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:25,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791183345] [2021-06-12 22:20:25,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:25,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:25,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:25,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791183345] [2021-06-12 22:20:25,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791183345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:25,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311378945] [2021-06-12 22:20:25,233 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:25,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:25,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 22:20:25,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311378945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:25,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:25,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 22:20:25,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121079074] [2021-06-12 22:20:25,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:20:25,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:25,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:20:25,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:20:25,317 INFO L87 Difference]: Start difference. First operand 29428 states and 112126 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:26,058 INFO L93 Difference]: Finished difference Result 36274 states and 134973 transitions. [2021-06-12 22:20:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 22:20:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:26,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:26,133 INFO L225 Difference]: With dead ends: 36274 [2021-06-12 22:20:26,133 INFO L226 Difference]: Without dead ends: 36250 [2021-06-12 22:20:26,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1292, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 22:20:26,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36250 states. [2021-06-12 22:20:26,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36250 to 29600. [2021-06-12 22:20:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29600 states, 29599 states have (on average 3.8062096692455825) internal successors, (112660), 29599 states have internal predecessors, (112660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29600 states to 29600 states and 112660 transitions. [2021-06-12 22:20:26,929 INFO L78 Accepts]: Start accepts. Automaton has 29600 states and 112660 transitions. Word has length 28 [2021-06-12 22:20:26,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:26,930 INFO L482 AbstractCegarLoop]: Abstraction has 29600 states and 112660 transitions. [2021-06-12 22:20:26,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 29600 states and 112660 transitions. [2021-06-12 22:20:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:26,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:26,975 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:27,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3601 [2021-06-12 22:20:27,175 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1253949625, now seen corresponding path program 137 times [2021-06-12 22:20:27,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:27,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507556113] [2021-06-12 22:20:27,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:27,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:27,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507556113] [2021-06-12 22:20:27,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507556113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:27,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628738873] [2021-06-12 22:20:27,214 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:27,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 22:20:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 22:20:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:27,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628738873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:27,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:27,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-12 22:20:27,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445398398] [2021-06-12 22:20:27,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 22:20:27,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:27,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 22:20:27,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-12 22:20:27,293 INFO L87 Difference]: Start difference. First operand 29600 states and 112660 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:27,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:27,772 INFO L93 Difference]: Finished difference Result 32160 states and 121084 transitions. [2021-06-12 22:20:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 22:20:27,772 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:27,840 INFO L225 Difference]: With dead ends: 32160 [2021-06-12 22:20:27,841 INFO L226 Difference]: Without dead ends: 32160 [2021-06-12 22:20:27,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-12 22:20:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32160 states. [2021-06-12 22:20:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32160 to 29526. [2021-06-12 22:20:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29526 states, 29525 states have (on average 3.807078746824725) internal successors, (112404), 29525 states have internal predecessors, (112404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29526 states to 29526 states and 112404 transitions. [2021-06-12 22:20:28,562 INFO L78 Accepts]: Start accepts. Automaton has 29526 states and 112404 transitions. Word has length 28 [2021-06-12 22:20:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:28,562 INFO L482 AbstractCegarLoop]: Abstraction has 29526 states and 112404 transitions. [2021-06-12 22:20:28,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:28,563 INFO L276 IsEmpty]: Start isEmpty. Operand 29526 states and 112404 transitions. [2021-06-12 22:20:28,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:28,611 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:28,611 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:28,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3602,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:28,811 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:28,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:28,812 INFO L82 PathProgramCache]: Analyzing trace with hash -719397267, now seen corresponding path program 138 times [2021-06-12 22:20:28,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:28,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009262533] [2021-06-12 22:20:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:28,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:28,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009262533] [2021-06-12 22:20:28,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009262533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:28,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983425544] [2021-06-12 22:20:28,852 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:28,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 22:20:28,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:28,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:28,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983425544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:28,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:28,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 22:20:28,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021443014] [2021-06-12 22:20:28,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 22:20:28,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:28,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 22:20:28,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 22:20:28,937 INFO L87 Difference]: Start difference. First operand 29526 states and 112404 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:29,747 INFO L93 Difference]: Finished difference Result 36197 states and 134714 transitions. [2021-06-12 22:20:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 22:20:29,747 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:29,825 INFO L225 Difference]: With dead ends: 36197 [2021-06-12 22:20:29,826 INFO L226 Difference]: Without dead ends: 36157 [2021-06-12 22:20:29,826 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 22:20:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36157 states. [2021-06-12 22:20:30,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36157 to 29682. [2021-06-12 22:20:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29682 states, 29681 states have (on average 3.8031737475152454) internal successors, (112882), 29681 states have internal predecessors, (112882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:30,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29682 states to 29682 states and 112882 transitions. [2021-06-12 22:20:30,492 INFO L78 Accepts]: Start accepts. Automaton has 29682 states and 112882 transitions. Word has length 28 [2021-06-12 22:20:30,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:30,492 INFO L482 AbstractCegarLoop]: Abstraction has 29682 states and 112882 transitions. [2021-06-12 22:20:30,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:30,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29682 states and 112882 transitions. [2021-06-12 22:20:30,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:30,537 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:30,537 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:30,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3603 [2021-06-12 22:20:30,737 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:30,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:30,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1643440553, now seen corresponding path program 139 times [2021-06-12 22:20:30,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:30,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194320621] [2021-06-12 22:20:30,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:30,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:30,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194320621] [2021-06-12 22:20:30,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194320621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:30,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706974635] [2021-06-12 22:20:30,768 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:30,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:30,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:30,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706974635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:30,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:30,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:20:30,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81398236] [2021-06-12 22:20:30,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:20:30,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:20:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:20:30,887 INFO L87 Difference]: Start difference. First operand 29682 states and 112882 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:32,207 INFO L93 Difference]: Finished difference Result 67954 states and 250170 transitions. [2021-06-12 22:20:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:20:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:32,373 INFO L225 Difference]: With dead ends: 67954 [2021-06-12 22:20:32,373 INFO L226 Difference]: Without dead ends: 67954 [2021-06-12 22:20:32,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 632.6ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:20:32,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67954 states. [2021-06-12 22:20:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67954 to 37388. [2021-06-12 22:20:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37388 states, 37387 states have (on average 3.884772781983042) internal successors, (145240), 37387 states have internal predecessors, (145240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37388 states to 37388 states and 145240 transitions. [2021-06-12 22:20:33,746 INFO L78 Accepts]: Start accepts. Automaton has 37388 states and 145240 transitions. Word has length 28 [2021-06-12 22:20:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:33,746 INFO L482 AbstractCegarLoop]: Abstraction has 37388 states and 145240 transitions. [2021-06-12 22:20:33,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:33,746 INFO L276 IsEmpty]: Start isEmpty. Operand 37388 states and 145240 transitions. [2021-06-12 22:20:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:33,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:33,802 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:34,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3604 [2021-06-12 22:20:34,002 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1122622099, now seen corresponding path program 140 times [2021-06-12 22:20:34,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:34,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055793261] [2021-06-12 22:20:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:34,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:34,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055793261] [2021-06-12 22:20:34,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055793261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:34,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742618439] [2021-06-12 22:20:34,033 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:34,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:34,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:34,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:34,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:34,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:34,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742618439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:34,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:34,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:20:34,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359826472] [2021-06-12 22:20:34,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:20:34,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:20:34,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:20:34,151 INFO L87 Difference]: Start difference. First operand 37388 states and 145240 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:35,653 INFO L93 Difference]: Finished difference Result 67327 states and 248511 transitions. [2021-06-12 22:20:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:20:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:35,811 INFO L225 Difference]: With dead ends: 67327 [2021-06-12 22:20:35,811 INFO L226 Difference]: Without dead ends: 67327 [2021-06-12 22:20:35,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 780.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3742, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 22:20:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67327 states. [2021-06-12 22:20:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67327 to 37385. [2021-06-12 22:20:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37385 states, 37384 states have (on average 3.8847100363791998) internal successors, (145226), 37384 states have internal predecessors, (145226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:37,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37385 states to 37385 states and 145226 transitions. [2021-06-12 22:20:37,097 INFO L78 Accepts]: Start accepts. Automaton has 37385 states and 145226 transitions. Word has length 28 [2021-06-12 22:20:37,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:37,097 INFO L482 AbstractCegarLoop]: Abstraction has 37385 states and 145226 transitions. [2021-06-12 22:20:37,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:37,097 INFO L276 IsEmpty]: Start isEmpty. Operand 37385 states and 145226 transitions. [2021-06-12 22:20:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:37,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:37,151 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:37,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3605,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:37,352 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:37,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1038046775, now seen corresponding path program 141 times [2021-06-12 22:20:37,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:37,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934995768] [2021-06-12 22:20:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:37,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:37,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:37,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934995768] [2021-06-12 22:20:37,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934995768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:37,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712014077] [2021-06-12 22:20:37,383 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:37,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 22:20:37,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:37,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:37,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712014077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:37,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:37,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:20:37,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402738494] [2021-06-12 22:20:37,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:20:37,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:20:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:20:37,497 INFO L87 Difference]: Start difference. First operand 37385 states and 145226 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:20:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:38,723 INFO L93 Difference]: Finished difference Result 62746 states and 233002 transitions. [2021-06-12 22:20:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-12 22:20:38,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:20:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:39,051 INFO L225 Difference]: With dead ends: 62746 [2021-06-12 22:20:39,051 INFO L226 Difference]: Without dead ends: 62746 [2021-06-12 22:20:39,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 551.4ms TimeCoverageRelationStatistics Valid=944, Invalid=3216, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 22:20:39,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62746 states. [2021-06-12 22:20:40,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62746 to 37407. [2021-06-12 22:20:40,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8850184462385715) internal successors, (145323), 37406 states have internal predecessors, (145323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145323 transitions. [2021-06-12 22:20:40,274 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145323 transitions. Word has length 28 [2021-06-12 22:20:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:40,274 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145323 transitions. [2021-06-12 22:20:40,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:20:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145323 transitions. [2021-06-12 22:20:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:40,332 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:40,332 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:40,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3606 [2021-06-12 22:20:40,532 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2110363749, now seen corresponding path program 142 times [2021-06-12 22:20:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:40,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325169481] [2021-06-12 22:20:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:40,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:40,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325169481] [2021-06-12 22:20:40,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325169481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:40,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547240571] [2021-06-12 22:20:40,563 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:40,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 22:20:40,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:40,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:40,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:40,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547240571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:40,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:40,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-06-12 22:20:40,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576176649] [2021-06-12 22:20:40,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 22:20:40,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:40,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 22:20:40,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 22:20:40,669 INFO L87 Difference]: Start difference. First operand 37407 states and 145323 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:20:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:41,772 INFO L93 Difference]: Finished difference Result 61875 states and 230752 transitions. [2021-06-12 22:20:41,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:20:41,772 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 28 [2021-06-12 22:20:41,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:41,924 INFO L225 Difference]: With dead ends: 61875 [2021-06-12 22:20:41,924 INFO L226 Difference]: Without dead ends: 61867 [2021-06-12 22:20:41,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 575.9ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 22:20:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61867 states. [2021-06-12 22:20:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61867 to 37407. [2021-06-12 22:20:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37407 states, 37406 states have (on average 3.8848580441640377) internal successors, (145317), 37406 states have internal predecessors, (145317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37407 states to 37407 states and 145317 transitions. [2021-06-12 22:20:43,156 INFO L78 Accepts]: Start accepts. Automaton has 37407 states and 145317 transitions. Word has length 28 [2021-06-12 22:20:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:43,156 INFO L482 AbstractCegarLoop]: Abstraction has 37407 states and 145317 transitions. [2021-06-12 22:20:43,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2021-06-12 22:20:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 37407 states and 145317 transitions. [2021-06-12 22:20:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:43,211 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:43,211 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:43,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3607,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:43,412 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:43,412 INFO L82 PathProgramCache]: Analyzing trace with hash 104546025, now seen corresponding path program 143 times [2021-06-12 22:20:43,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:43,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039751194] [2021-06-12 22:20:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:43,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:43,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039751194] [2021-06-12 22:20:43,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039751194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:43,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389148674] [2021-06-12 22:20:43,443 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:43,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 22:20:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:43,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:43,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:43,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389148674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:43,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:43,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:20:43,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050301114] [2021-06-12 22:20:43,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:20:43,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:43,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:20:43,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:20:43,562 INFO L87 Difference]: Start difference. First operand 37407 states and 145317 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:20:43,871 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-12 22:20:44,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:44,922 INFO L93 Difference]: Finished difference Result 61558 states and 229893 transitions. [2021-06-12 22:20:44,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 22:20:44,923 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-06-12 22:20:44,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:45,063 INFO L225 Difference]: With dead ends: 61558 [2021-06-12 22:20:45,063 INFO L226 Difference]: Without dead ends: 61558 [2021-06-12 22:20:45,064 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 671.9ms TimeCoverageRelationStatistics Valid=872, Invalid=3034, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 22:20:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61558 states. [2021-06-12 22:20:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61558 to 37415. [2021-06-12 22:20:46,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.8849361201689208) internal successors, (145351), 37414 states have internal predecessors, (145351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145351 transitions. [2021-06-12 22:20:46,204 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145351 transitions. Word has length 28 [2021-06-12 22:20:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:46,204 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145351 transitions. [2021-06-12 22:20:46,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:20:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145351 transitions. [2021-06-12 22:20:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:46,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:46,257 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:46,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3608 [2021-06-12 22:20:46,457 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:46,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:46,458 INFO L82 PathProgramCache]: Analyzing trace with hash -950831369, now seen corresponding path program 144 times [2021-06-12 22:20:46,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:46,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041567128] [2021-06-12 22:20:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:46,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:46,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:46,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041567128] [2021-06-12 22:20:46,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041567128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:46,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870560138] [2021-06-12 22:20:46,488 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:46,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 22:20:46,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:46,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:46,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870560138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:46,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:46,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-12 22:20:46,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852542239] [2021-06-12 22:20:46,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 22:20:46,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:46,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 22:20:46,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 22:20:46,606 INFO L87 Difference]: Start difference. First operand 37415 states and 145351 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:20:47,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:47,741 INFO L93 Difference]: Finished difference Result 61347 states and 229367 transitions. [2021-06-12 22:20:47,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 22:20:47,742 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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 28 [2021-06-12 22:20:47,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:47,895 INFO L225 Difference]: With dead ends: 61347 [2021-06-12 22:20:47,896 INFO L226 Difference]: Without dead ends: 61339 [2021-06-12 22:20:47,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 476.2ms TimeCoverageRelationStatistics Valid=767, Invalid=2539, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 22:20:47,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61339 states. [2021-06-12 22:20:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61339 to 37415. [2021-06-12 22:20:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37415 states, 37414 states have (on average 3.884882664243331) internal successors, (145349), 37414 states have internal predecessors, (145349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37415 states to 37415 states and 145349 transitions. [2021-06-12 22:20:49,136 INFO L78 Accepts]: Start accepts. Automaton has 37415 states and 145349 transitions. Word has length 28 [2021-06-12 22:20:49,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:49,136 INFO L482 AbstractCegarLoop]: Abstraction has 37415 states and 145349 transitions. [2021-06-12 22:20:49,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 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) [2021-06-12 22:20:49,137 INFO L276 IsEmpty]: Start isEmpty. Operand 37415 states and 145349 transitions. [2021-06-12 22:20:49,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:49,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:49,192 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:49,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3609 [2021-06-12 22:20:49,392 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:49,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:49,392 INFO L82 PathProgramCache]: Analyzing trace with hash 401579921, now seen corresponding path program 145 times [2021-06-12 22:20:49,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:49,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385210146] [2021-06-12 22:20:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:49,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:49,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:49,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385210146] [2021-06-12 22:20:49,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385210146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:49,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125005977] [2021-06-12 22:20:49,424 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:49,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:49,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:49,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125005977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:49,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:49,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:20:49,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430281022] [2021-06-12 22:20:49,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:20:49,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:49,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:20:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:20:49,533 INFO L87 Difference]: Start difference. First operand 37415 states and 145349 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:50,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:50,784 INFO L93 Difference]: Finished difference Result 60787 states and 225952 transitions. [2021-06-12 22:20:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-12 22:20:50,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:50,934 INFO L225 Difference]: With dead ends: 60787 [2021-06-12 22:20:50,934 INFO L226 Difference]: Without dead ends: 60787 [2021-06-12 22:20:50,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 725.6ms TimeCoverageRelationStatistics Valid=978, Invalid=3714, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 22:20:50,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60787 states. [2021-06-12 22:20:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60787 to 40214. [2021-06-12 22:20:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40214 states, 40213 states have (on average 3.8890159898540273) internal successors, (156389), 40213 states have internal predecessors, (156389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40214 states to 40214 states and 156389 transitions. [2021-06-12 22:20:52,166 INFO L78 Accepts]: Start accepts. Automaton has 40214 states and 156389 transitions. Word has length 28 [2021-06-12 22:20:52,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:52,166 INFO L482 AbstractCegarLoop]: Abstraction has 40214 states and 156389 transitions. [2021-06-12 22:20:52,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,166 INFO L276 IsEmpty]: Start isEmpty. Operand 40214 states and 156389 transitions. [2021-06-12 22:20:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:52,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:52,224 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:52,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:52,425 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1473896895, now seen corresponding path program 146 times [2021-06-12 22:20:52,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:52,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460281685] [2021-06-12 22:20:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:52,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:52,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460281685] [2021-06-12 22:20:52,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460281685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:52,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340152543] [2021-06-12 22:20:52,457 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:52,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 22:20:52,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:52,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:52,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340152543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:52,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:52,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:20:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374211362] [2021-06-12 22:20:52,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:20:52,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:20:52,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:20:52,553 INFO L87 Difference]: Start difference. First operand 40214 states and 156389 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:52,707 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 22:20:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:53,793 INFO L93 Difference]: Finished difference Result 60310 states and 224694 transitions. [2021-06-12 22:20:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 22:20:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:53,938 INFO L225 Difference]: With dead ends: 60310 [2021-06-12 22:20:53,939 INFO L226 Difference]: Without dead ends: 60302 [2021-06-12 22:20:53,939 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=736, Invalid=2804, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 22:20:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60302 states. [2021-06-12 22:20:54,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60302 to 39928. [2021-06-12 22:20:54,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39928 states, 39927 states have (on average 3.8946577503944697) internal successors, (155502), 39927 states have internal predecessors, (155502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39928 states to 39928 states and 155502 transitions. [2021-06-12 22:20:55,085 INFO L78 Accepts]: Start accepts. Automaton has 39928 states and 155502 transitions. Word has length 28 [2021-06-12 22:20:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 22:20:55,086 INFO L482 AbstractCegarLoop]: Abstraction has 39928 states and 155502 transitions. [2021-06-12 22:20:55,086 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 39928 states and 155502 transitions. [2021-06-12 22:20:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 22:20:55,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 22:20:55,144 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 22:20:55,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3611,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:55,345 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 22:20:55,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 22:20:55,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1560233875, now seen corresponding path program 147 times [2021-06-12 22:20:55,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 22:20:55,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477345164] [2021-06-12 22:20:55,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 22:20:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 22:20:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:55,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 22:20:55,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477345164] [2021-06-12 22:20:55,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477345164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:55,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468129341] [2021-06-12 22:20:55,380 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 22:20:55,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 22:20:55,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 22:20:55,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 22:20:55,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 22:20:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 22:20:55,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468129341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 22:20:55,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 22:20:55,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-12 22:20:55,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904949274] [2021-06-12 22:20:55,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 22:20:55,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 22:20:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 22:20:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 22:20:55,479 INFO L87 Difference]: Start difference. First operand 39928 states and 155502 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 22:20:56,138 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-12 22:20:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 22:20:56,380 INFO L93 Difference]: Finished difference Result 58857 states and 220695 transitions. [2021-06-12 22:20:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 22:20:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-12 22:20:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 22:20:56,523 INFO L225 Difference]: With dead ends: 58857 [2021-06-12 22:20:56,523 INFO L226 Difference]: Without dead ends: 58833 [2021-06-12 22:20:56,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=498, Invalid=1758, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 22:20:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58833 states.