/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/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 20:47:23,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 20:47:23,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 20:47:23,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 20:47:24,011 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 20:47:24,037 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 20:47:24,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 20:47:24,038 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 20:47:24,038 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 20:47:24,039 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 20:47:24,039 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 20:47:24,039 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 20:47:24,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 20:47:24,040 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 20:47:24,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 20:47:24,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 20:47:24,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 20:47:24,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 20:47:24,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 20:47:24,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 20:47:24,044 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 20:47:24,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 20:47:24,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 20:47:24,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 20:47:24,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 20:47:24,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 20:47:24,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 20:47:24,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 20:47:24,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 20:47:24,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 20:47:24,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 20:47:24,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 20:47:24,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 20:47:24,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 20:47:24,070 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 20:47:24,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 20:47:24,070 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 20:47:24,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 20:47:24,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 20:47:24,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 20:47:24,383 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 20:47:24,384 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 20:47:24,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-06-12 20:47:24,393 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-06-12 20:47:24,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 20:47:24,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 20:47:24,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 20:47:24,424 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 20:47:24,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 20:47:24,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,445 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 20:47:24,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 20:47:24,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 20:47:24,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 20:47:24,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/1) ... [2021-06-12 20:47:24,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 20:47:24,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 20:47:24,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 20:47:24,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 20:47:24,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (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 20:47:24,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 20:47:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 20:47:24,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 20:47:24,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 20:47:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 20:47:24,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 20:47:24,543 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 20:47:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 20:47:24,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 20:47:24,543 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 20:47:24,689 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 20:47:24,689 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-12 20:47:24,690 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-12 20:47:24,691 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:47:24 BoogieIcfgContainer [2021-06-12 20:47:24,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 20:47:24,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 20:47:24,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 20:47:24,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 20:47:24,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 08:47:24" (1/2) ... [2021-06-12 20:47:24,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe595ba and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 08:47:24, skipping insertion in model container [2021-06-12 20:47:24,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 08:47:24" (2/2) ... [2021-06-12 20:47:24,697 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-06-12 20:47:24,702 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 20:47:24,702 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 20:47:24,702 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 20:47:24,703 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 20:47:24,727 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 20:47:24,742 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 20:47:24,757 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 20:47:24,757 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 20:47:24,757 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 20:47:24,757 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 20:47:24,758 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 20:47:24,758 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 20:47:24,758 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 20:47:24,758 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 20:47:24,766 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2021-06-12 20:47:24,774 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 20:47:24,781 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:24,782 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:24,782 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:24,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:24,787 INFO L82 PathProgramCache]: Analyzing trace with hash 10984786, now seen corresponding path program 1 times [2021-06-12 20:47:24,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:24,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158939832] [2021-06-12 20:47:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:24,913 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 20:47:24,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:24,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158939832] [2021-06-12 20:47:24,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158939832] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:47:24,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:47:24,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:47:24,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654337366] [2021-06-12 20:47:24,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:47:24,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:47:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:47:24,932 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:24,963 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2021-06-12 20:47:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:47:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-12 20:47:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:24,989 INFO L225 Difference]: With dead ends: 54 [2021-06-12 20:47:24,990 INFO L226 Difference]: Without dead ends: 42 [2021-06-12 20:47:24,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:47:25,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-06-12 20:47:25,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-06-12 20:47:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 70 transitions. [2021-06-12 20:47:25,035 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 70 transitions. Word has length 11 [2021-06-12 20:47:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:25,035 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 70 transitions. [2021-06-12 20:47:25,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 70 transitions. [2021-06-12 20:47:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-12 20:47:25,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:25,037 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:25,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 20:47:25,037 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:25,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:25,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1844506957, now seen corresponding path program 1 times [2021-06-12 20:47:25,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:25,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668241981] [2021-06-12 20:47:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:25,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:25,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668241981] [2021-06-12 20:47:25,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668241981] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:47:25,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:47:25,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 20:47:25,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488555976] [2021-06-12 20:47:25,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:47:25,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:25,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:47:25,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:47:25,095 INFO L87 Difference]: Start difference. First operand 36 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:25,113 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2021-06-12 20:47:25,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:47:25,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-12 20:47:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:25,114 INFO L225 Difference]: With dead ends: 37 [2021-06-12 20:47:25,114 INFO L226 Difference]: Without dead ends: 36 [2021-06-12 20:47:25,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:47:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-06-12 20:47:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-06-12 20:47:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-06-12 20:47:25,121 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2021-06-12 20:47:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:25,121 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-06-12 20:47:25,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-06-12 20:47:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:47:25,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:25,122 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:25,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 20:47:25,123 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:25,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash 244145385, now seen corresponding path program 1 times [2021-06-12 20:47:25,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:25,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309201863] [2021-06-12 20:47:25,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:25,268 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 20:47:25,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:25,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309201863] [2021-06-12 20:47:25,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309201863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:25,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316486277] [2021-06-12 20:47:25,270 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 20:47:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:25,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 20:47:25,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:25,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20:47:25,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:25,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:25,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:25,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-06-12 20:47:25,529 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 20:47:25,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316486277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:25,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:25,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 20:47:25,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155541750] [2021-06-12 20:47:25,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:47:25,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:25,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:47:25,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:47:25,532 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:25,613 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-06-12 20:47:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:47:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:47:25,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:25,618 INFO L225 Difference]: With dead ends: 67 [2021-06-12 20:47:25,618 INFO L226 Difference]: Without dead ends: 56 [2021-06-12 20:47:25,619 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:47:25,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-12 20:47:25,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-06-12 20:47:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2021-06-12 20:47:25,626 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 16 [2021-06-12 20:47:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:25,626 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2021-06-12 20:47:25,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2021-06-12 20:47:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 20:47:25,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:25,627 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:25,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 20:47:25,861 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1749319479, now seen corresponding path program 1 times [2021-06-12 20:47:25,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:25,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215571442] [2021-06-12 20:47:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:47:25,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:25,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215571442] [2021-06-12 20:47:25,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215571442] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:47:25,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:47:25,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 20:47:25,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655561988] [2021-06-12 20:47:25,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 20:47:25,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:25,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 20:47:25,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:47:25,899 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:25,913 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-06-12 20:47:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 20:47:25,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-12 20:47:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:25,914 INFO L225 Difference]: With dead ends: 52 [2021-06-12 20:47:25,914 INFO L226 Difference]: Without dead ends: 52 [2021-06-12 20:47:25,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 20:47:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-12 20:47:25,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-06-12 20:47:25,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-06-12 20:47:25,920 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 16 [2021-06-12 20:47:25,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:25,921 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-06-12 20:47:25,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-06-12 20:47:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 20:47:25,921 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:25,922 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:25,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 20:47:25,922 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:25,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:25,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1115470710, now seen corresponding path program 2 times [2021-06-12 20:47:25,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:25,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542008224] [2021-06-12 20:47:25,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:25,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:25,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542008224] [2021-06-12 20:47:25,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542008224] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 20:47:25,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 20:47:25,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 20:47:25,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708386089] [2021-06-12 20:47:25,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 20:47:25,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:25,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 20:47:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:47:25,972 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. 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 20:47:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:26,005 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-06-12 20:47:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:47:26,007 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 20:47:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:26,009 INFO L225 Difference]: With dead ends: 116 [2021-06-12 20:47:26,009 INFO L226 Difference]: Without dead ends: 113 [2021-06-12 20:47:26,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-12 20:47:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-12 20:47:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-06-12 20:47:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:26,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-06-12 20:47:26,022 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 18 [2021-06-12 20:47:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:26,022 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-06-12 20:47:26,023 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 20:47:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-06-12 20:47:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:47:26,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:26,024 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:26,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 20:47:26,024 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:26,026 INFO L82 PathProgramCache]: Analyzing trace with hash -686636110, now seen corresponding path program 3 times [2021-06-12 20:47:26,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:26,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960076067] [2021-06-12 20:47:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:47:26,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:26,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960076067] [2021-06-12 20:47:26,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960076067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:26,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325998] [2021-06-12 20:47:26,070 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 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 20:47:26,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 20:47:26,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:26,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-12 20:47:26,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:47:26,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:26,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:26,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 20:47:26,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812588331] [2021-06-12 20:47:26,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 20:47:26,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:26,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 20:47:26,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:47:26,166 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:26,175 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2021-06-12 20:47:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 20:47:26,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:47:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:26,177 INFO L225 Difference]: With dead ends: 118 [2021-06-12 20:47:26,177 INFO L226 Difference]: Without dead ends: 118 [2021-06-12 20:47:26,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 20:47:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-12 20:47:26,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-06-12 20:47:26,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-06-12 20:47:26,188 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 21 [2021-06-12 20:47:26,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:26,189 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-06-12 20:47:26,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-06-12 20:47:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:47:26,190 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:26,190 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:26,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:26,414 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1614866322, now seen corresponding path program 1 times [2021-06-12 20:47:26,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:26,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374044210] [2021-06-12 20:47:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:26,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:26,605 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 20:47:26,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:26,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374044210] [2021-06-12 20:47:26,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374044210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:26,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503612312] [2021-06-12 20:47:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:26,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:47:26,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:26,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:26,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:26,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:26,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 20:47:26,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:26,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:26,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:26,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-06-12 20:47:26,944 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 20:47:26,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503612312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:26,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:26,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 20:47:26,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55926738] [2021-06-12 20:47:26,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:47:26,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:26,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:47:26,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:47:26,947 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:27,017 INFO L93 Difference]: Finished difference Result 175 states and 364 transitions. [2021-06-12 20:47:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:47:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:47:27,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:27,021 INFO L225 Difference]: With dead ends: 175 [2021-06-12 20:47:27,021 INFO L226 Difference]: Without dead ends: 157 [2021-06-12 20:47:27,022 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:47:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-06-12 20:47:27,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2021-06-12 20:47:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 118 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 242 transitions. [2021-06-12 20:47:27,042 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 242 transitions. Word has length 21 [2021-06-12 20:47:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:27,042 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 242 transitions. [2021-06-12 20:47:27,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 242 transitions. [2021-06-12 20:47:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:47:27,043 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:27,044 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:27,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:27,265 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:27,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:27,266 INFO L82 PathProgramCache]: Analyzing trace with hash 466490442, now seen corresponding path program 2 times [2021-06-12 20:47:27,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:27,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189591594] [2021-06-12 20:47:27,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:27,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:27,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189591594] [2021-06-12 20:47:27,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189591594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:27,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361191720] [2021-06-12 20:47:27,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:27,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:27,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:27,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:47:27,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:27,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:27,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:27,637 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 34 treesize of output 18 [2021-06-12 20:47:27,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:27,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:27,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:27,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-06-12 20:47:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:27,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361191720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:27,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:27,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 20:47:27,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781552976] [2021-06-12 20:47:27,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 20:47:27,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:27,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 20:47:27,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:47:27,672 INFO L87 Difference]: Start difference. First operand 119 states and 242 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:27,763 INFO L93 Difference]: Finished difference Result 209 states and 432 transitions. [2021-06-12 20:47:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:47:27,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:47:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:27,764 INFO L225 Difference]: With dead ends: 209 [2021-06-12 20:47:27,764 INFO L226 Difference]: Without dead ends: 190 [2021-06-12 20:47:27,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 170.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 20:47:27,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-12 20:47:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 123. [2021-06-12 20:47:27,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 249 transitions. [2021-06-12 20:47:27,772 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 249 transitions. Word has length 21 [2021-06-12 20:47:27,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:27,772 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 249 transitions. [2021-06-12 20:47:27,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:27,772 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 249 transitions. [2021-06-12 20:47:27,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-12 20:47:27,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:27,773 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:27,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:27,997 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:27,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:27,998 INFO L82 PathProgramCache]: Analyzing trace with hash -870312972, now seen corresponding path program 3 times [2021-06-12 20:47:27,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:27,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080391829] [2021-06-12 20:47:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:28,118 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 20:47:28,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:28,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080391829] [2021-06-12 20:47:28,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080391829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:28,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567940170] [2021-06-12 20:47:28,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:47:28,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:47:28,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 20:47:28,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:28,257 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-12 20:47:28,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-06-12 20:47:28,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:28,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:28,266 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 20:47:28,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-06-12 20:47:28,279 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 20:47:28,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567940170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:28,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:28,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 20:47:28,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798095601] [2021-06-12 20:47:28,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 20:47:28,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 20:47:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:47:28,282 INFO L87 Difference]: Start difference. First operand 123 states and 249 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:28,389 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-06-12 20:47:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 20:47:28,390 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-12 20:47:28,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:28,391 INFO L225 Difference]: With dead ends: 180 [2021-06-12 20:47:28,391 INFO L226 Difference]: Without dead ends: 165 [2021-06-12 20:47:28,391 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-12 20:47:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-12 20:47:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-06-12 20:47:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.046511627906977) internal successors, (264), 129 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 264 transitions. [2021-06-12 20:47:28,397 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 264 transitions. Word has length 21 [2021-06-12 20:47:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:28,397 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 264 transitions. [2021-06-12 20:47:28,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 264 transitions. [2021-06-12 20:47:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 20:47:28,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:28,399 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:28,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:28,613 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:28,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:28,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1631872213, now seen corresponding path program 4 times [2021-06-12 20:47:28,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:28,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895385753] [2021-06-12 20:47:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:28,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:28,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895385753] [2021-06-12 20:47:28,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895385753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:28,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799080040] [2021-06-12 20:47:28,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:28,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:28,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:28,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-12 20:47:28,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:28,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799080040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:28,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:28,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-12 20:47:28,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559068533] [2021-06-12 20:47:28,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 20:47:28,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:28,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 20:47:28,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:47:28,741 INFO L87 Difference]: Start difference. First operand 130 states and 264 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:28,760 INFO L93 Difference]: Finished difference Result 267 states and 530 transitions. [2021-06-12 20:47:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 20:47:28,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-12 20:47:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:28,763 INFO L225 Difference]: With dead ends: 267 [2021-06-12 20:47:28,763 INFO L226 Difference]: Without dead ends: 262 [2021-06-12 20:47:28,763 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-12 20:47:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-12 20:47:28,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 163. [2021-06-12 20:47:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.0925925925925926) internal successors, (339), 162 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:28,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 339 transitions. [2021-06-12 20:47:28,776 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 339 transitions. Word has length 23 [2021-06-12 20:47:28,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:28,776 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 339 transitions. [2021-06-12 20:47:28,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:28,776 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 339 transitions. [2021-06-12 20:47:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:28,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:28,783 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:29,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:29,007 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:29,007 INFO L82 PathProgramCache]: Analyzing trace with hash 979925673, now seen corresponding path program 5 times [2021-06-12 20:47:29,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:29,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025035278] [2021-06-12 20:47:29,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:29,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:29,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:47:29,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025035278] [2021-06-12 20:47:29,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025035278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:29,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550691070] [2021-06-12 20:47:29,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:29,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:47:29,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:29,282 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:29,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:29,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:29,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:29,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:29,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:29,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:29,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:29,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:29,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:29,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:29,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:29,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550691070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:29,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:29,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-12 20:47:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403635055] [2021-06-12 20:47:29,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:47:29,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:47:29,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:47:29,548 INFO L87 Difference]: Start difference. First operand 163 states and 339 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 20:47:29,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:29,745 INFO L93 Difference]: Finished difference Result 337 states and 691 transitions. [2021-06-12 20:47:29,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:47:29,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 26 [2021-06-12 20:47:29,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:29,748 INFO L225 Difference]: With dead ends: 337 [2021-06-12 20:47:29,748 INFO L226 Difference]: Without dead ends: 264 [2021-06-12 20:47:29,748 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:29,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-06-12 20:47:29,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 202. [2021-06-12 20:47:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0696517412935322) internal successors, (416), 201 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 416 transitions. [2021-06-12 20:47:29,758 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 416 transitions. Word has length 26 [2021-06-12 20:47:29,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:29,758 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 416 transitions. [2021-06-12 20:47:29,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 20:47:29,758 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 416 transitions. [2021-06-12 20:47:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:29,760 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:29,760 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:29,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:29,974 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:29,974 INFO L82 PathProgramCache]: Analyzing trace with hash -494046431, now seen corresponding path program 6 times [2021-06-12 20:47:29,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:29,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053809163] [2021-06-12 20:47:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:30,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:30,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053809163] [2021-06-12 20:47:30,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053809163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:30,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913591120] [2021-06-12 20:47:30,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:30,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:30,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:30,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:30,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:30,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:30,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:30,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:30,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:30,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:30,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:30,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:30,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:30,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:30,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:30,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913591120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:30,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:30,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-12 20:47:30,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323807317] [2021-06-12 20:47:30,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:47:30,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:30,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:47:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:30,546 INFO L87 Difference]: Start difference. First operand 202 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:30,716 INFO L93 Difference]: Finished difference Result 375 states and 785 transitions. [2021-06-12 20:47:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 20:47:30,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-12 20:47:30,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:30,718 INFO L225 Difference]: With dead ends: 375 [2021-06-12 20:47:30,718 INFO L226 Difference]: Without dead ends: 339 [2021-06-12 20:47:30,718 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:30,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-12 20:47:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 214. [2021-06-12 20:47:30,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.056338028169014) internal successors, (438), 213 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:30,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 438 transitions. [2021-06-12 20:47:30,725 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 438 transitions. Word has length 26 [2021-06-12 20:47:30,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:30,725 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 438 transitions. [2021-06-12 20:47:30,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:30,725 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 438 transitions. [2021-06-12 20:47:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:30,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:30,726 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:30,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 20:47:30,941 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:30,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:30,941 INFO L82 PathProgramCache]: Analyzing trace with hash 960569099, now seen corresponding path program 7 times [2021-06-12 20:47:30,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:30,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802759651] [2021-06-12 20:47:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:31,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802759651] [2021-06-12 20:47:31,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802759651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:31,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876748018] [2021-06-12 20:47:31,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:31,145 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:31,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:31,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:31,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:31,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:31,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:31,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:31,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:31,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:31,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:31,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:31,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:31,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:31,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876748018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:31,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:31,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-12 20:47:31,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165811467] [2021-06-12 20:47:31,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:47:31,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:31,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:47:31,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:31,459 INFO L87 Difference]: Start difference. First operand 214 states and 438 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:31,677 INFO L93 Difference]: Finished difference Result 372 states and 766 transitions. [2021-06-12 20:47:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:47:31,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-12 20:47:31,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:31,680 INFO L225 Difference]: With dead ends: 372 [2021-06-12 20:47:31,680 INFO L226 Difference]: Without dead ends: 352 [2021-06-12 20:47:31,680 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:31,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-12 20:47:31,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 217. [2021-06-12 20:47:31,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0555555555555554) internal successors, (444), 216 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:31,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 444 transitions. [2021-06-12 20:47:31,686 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 444 transitions. Word has length 26 [2021-06-12 20:47:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:31,687 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 444 transitions. [2021-06-12 20:47:31,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 444 transitions. [2021-06-12 20:47:31,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:31,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:31,687 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:31,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:31,901 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash -30244623, now seen corresponding path program 8 times [2021-06-12 20:47:31,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:31,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963783607] [2021-06-12 20:47:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:47:32,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:32,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963783607] [2021-06-12 20:47:32,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963783607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:32,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409303315] [2021-06-12 20:47:32,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:47:32,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:32,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:32,082 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:32,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:32,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:32,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:32,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:32,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:32,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:32,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:32,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:32,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:32,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:32,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409303315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:32,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:32,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-12 20:47:32,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396367845] [2021-06-12 20:47:32,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:47:32,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:32,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:47:32,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:47:32,323 INFO L87 Difference]: Start difference. First operand 217 states and 444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 20:47:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:32,480 INFO L93 Difference]: Finished difference Result 548 states and 1112 transitions. [2021-06-12 20:47:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:47:32,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 26 [2021-06-12 20:47:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:32,483 INFO L225 Difference]: With dead ends: 548 [2021-06-12 20:47:32,483 INFO L226 Difference]: Without dead ends: 426 [2021-06-12 20:47:32,483 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:32,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-12 20:47:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 247. [2021-06-12 20:47:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.024390243902439) internal successors, (498), 246 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 498 transitions. [2021-06-12 20:47:32,491 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 498 transitions. Word has length 26 [2021-06-12 20:47:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:32,491 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 498 transitions. [2021-06-12 20:47:32,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 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 20:47:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 498 transitions. [2021-06-12 20:47:32,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:32,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:32,492 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:32,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:32,697 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:32,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:32,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1504216727, now seen corresponding path program 9 times [2021-06-12 20:47:32,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:32,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389189882] [2021-06-12 20:47:32,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:32,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:32,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389189882] [2021-06-12 20:47:32,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389189882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:32,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59746651] [2021-06-12 20:47:32,864 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 20:47:32,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:47:32,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:32,899 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 20:47:32,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:33,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:33,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:33,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:33,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:33,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:33,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:33,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-06-12 20:47:33,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:33,240 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-06-12 20:47:33,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:33,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:10 [2021-06-12 20:47:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:33,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59746651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:33,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:33,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-12 20:47:33,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797041172] [2021-06-12 20:47:33,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:47:33,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:33,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:47:33,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:33,254 INFO L87 Difference]: Start difference. First operand 247 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:33,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:33,674 INFO L93 Difference]: Finished difference Result 598 states and 1212 transitions. [2021-06-12 20:47:33,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:47:33,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-12 20:47:33,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:33,677 INFO L225 Difference]: With dead ends: 598 [2021-06-12 20:47:33,677 INFO L226 Difference]: Without dead ends: 496 [2021-06-12 20:47:33,677 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-12 20:47:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 235. [2021-06-12 20:47:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-06-12 20:47:33,684 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-06-12 20:47:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:33,684 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-06-12 20:47:33,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:33,685 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-06-12 20:47:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:33,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:33,685 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:33,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 20:47:33,905 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash -49601197, now seen corresponding path program 10 times [2021-06-12 20:47:33,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:33,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452654223] [2021-06-12 20:47:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:34,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:34,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452654223] [2021-06-12 20:47:34,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452654223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:34,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147745468] [2021-06-12 20:47:34,088 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 20:47:34,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:34,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:34,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:34,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:34,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:34,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:34,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:34,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:34,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:34,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:34,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:34,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:34,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:34,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147745468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:34,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:34,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-12 20:47:34,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576280261] [2021-06-12 20:47:34,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:47:34,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:34,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:47:34,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:34,432 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:34,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:34,656 INFO L93 Difference]: Finished difference Result 470 states and 964 transitions. [2021-06-12 20:47:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:47:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-12 20:47:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:34,658 INFO L225 Difference]: With dead ends: 470 [2021-06-12 20:47:34,658 INFO L226 Difference]: Without dead ends: 450 [2021-06-12 20:47:34,659 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:34,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-12 20:47:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-06-12 20:47:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-06-12 20:47:34,665 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-06-12 20:47:34,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:34,665 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-06-12 20:47:34,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:34,666 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-06-12 20:47:34,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:34,666 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:34,666 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:34,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 20:47:34,889 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash 802414539, now seen corresponding path program 11 times [2021-06-12 20:47:34,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:34,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582043237] [2021-06-12 20:47:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:35,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:35,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582043237] [2021-06-12 20:47:35,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582043237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:35,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87732255] [2021-06-12 20:47:35,058 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 20:47:35,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:47:35,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:35,091 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:35,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:35,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:35,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:35,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:35,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:35,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:35,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:35,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:35,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:35,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:35,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:35,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:35,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87732255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:35,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:35,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-12 20:47:35,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718463439] [2021-06-12 20:47:35,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 20:47:35,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 20:47:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:35,381 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:35,636 INFO L93 Difference]: Finished difference Result 414 states and 855 transitions. [2021-06-12 20:47:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:47:35,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 26 [2021-06-12 20:47:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:35,638 INFO L225 Difference]: With dead ends: 414 [2021-06-12 20:47:35,638 INFO L226 Difference]: Without dead ends: 393 [2021-06-12 20:47:35,639 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:35,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-12 20:47:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2021-06-12 20:47:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.05327868852459) internal successors, (501), 244 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 501 transitions. [2021-06-12 20:47:35,645 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 501 transitions. Word has length 26 [2021-06-12 20:47:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:35,645 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 501 transitions. [2021-06-12 20:47:35,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 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 20:47:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 501 transitions. [2021-06-12 20:47:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:35,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:35,646 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:35,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 20:47:35,870 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:35,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:35,871 INFO L82 PathProgramCache]: Analyzing trace with hash 509590407, now seen corresponding path program 12 times [2021-06-12 20:47:35,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:35,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124625527] [2021-06-12 20:47:35,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:47:36,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124625527] [2021-06-12 20:47:36,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124625527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:36,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400851451] [2021-06-12 20:47:36,043 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 20:47:36,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:36,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:36,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:36,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:36,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:36,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:36,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:36,296 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:36,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:36,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:36,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:36,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:36,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400851451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:36,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:36,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-12 20:47:36,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633503732] [2021-06-12 20:47:36,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:47:36,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:47:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:47:36,323 INFO L87 Difference]: Start difference. First operand 245 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:36,672 INFO L93 Difference]: Finished difference Result 610 states and 1221 transitions. [2021-06-12 20:47:36,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:47:36,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-12 20:47:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:36,674 INFO L225 Difference]: With dead ends: 610 [2021-06-12 20:47:36,674 INFO L226 Difference]: Without dead ends: 465 [2021-06-12 20:47:36,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 20:47:36,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-12 20:47:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 293. [2021-06-12 20:47:36,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-06-12 20:47:36,682 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 26 [2021-06-12 20:47:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:36,682 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-06-12 20:47:36,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-06-12 20:47:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:36,683 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:36,683 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:36,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:36,901 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:36,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:36,901 INFO L82 PathProgramCache]: Analyzing trace with hash -964381697, now seen corresponding path program 13 times [2021-06-12 20:47:36,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:36,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994108991] [2021-06-12 20:47:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:37,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994108991] [2021-06-12 20:47:37,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994108991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237119581] [2021-06-12 20:47:37,092 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 20:47:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:37,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:37,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:37,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:37,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:37,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:37,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:37,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:37,351 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:37,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:37,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:37,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:37,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:37,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237119581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:37,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:37,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-12 20:47:37,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140648115] [2021-06-12 20:47:37,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:47:37,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:37,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:47:37,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:47:37,377 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 20:47:37,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:37,635 INFO L93 Difference]: Finished difference Result 634 states and 1305 transitions. [2021-06-12 20:47:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:47:37,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-12 20:47:37,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:37,638 INFO L225 Difference]: With dead ends: 634 [2021-06-12 20:47:37,638 INFO L226 Difference]: Without dead ends: 581 [2021-06-12 20:47:37,638 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-06-12 20:47:37,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 290. [2021-06-12 20:47:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:37,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-06-12 20:47:37,646 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-06-12 20:47:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:37,646 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-06-12 20:47:37,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 20:47:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-06-12 20:47:37,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:37,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:37,647 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:37,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:37,847 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash 490233833, now seen corresponding path program 14 times [2021-06-12 20:47:37,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:37,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744987074] [2021-06-12 20:47:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:38,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:38,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744987074] [2021-06-12 20:47:38,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744987074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:38,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145240848] [2021-06-12 20:47:38,015 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 20:47:38,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:38,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:38,041 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:38,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:38,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:38,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:38,273 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:38,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:38,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:38,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:38,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:38,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145240848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:38,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:38,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-12 20:47:38,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875408715] [2021-06-12 20:47:38,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:47:38,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:38,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:47:38,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:47:38,296 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 20:47:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:38,613 INFO L93 Difference]: Finished difference Result 541 states and 1096 transitions. [2021-06-12 20:47:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:47:38,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-12 20:47:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:38,616 INFO L225 Difference]: With dead ends: 541 [2021-06-12 20:47:38,616 INFO L226 Difference]: Without dead ends: 521 [2021-06-12 20:47:38,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-06-12 20:47:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-06-12 20:47:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-06-12 20:47:38,624 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-06-12 20:47:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:38,624 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-06-12 20:47:38,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 20:47:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-06-12 20:47:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:38,625 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:38,625 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:38,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:38,845 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1342249569, now seen corresponding path program 15 times [2021-06-12 20:47:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:38,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491475126] [2021-06-12 20:47:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:38,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491475126] [2021-06-12 20:47:38,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491475126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:38,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037012636] [2021-06-12 20:47:38,990 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 20:47:39,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:47:39,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:39,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:39,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:39,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:39,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:39,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:39,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:39,259 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:39,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:39,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:39,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:39,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-06-12 20:47:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:39,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037012636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:39,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:39,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-12 20:47:39,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859305736] [2021-06-12 20:47:39,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 20:47:39,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:39,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 20:47:39,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-12 20:47:39,281 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 20:47:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:39,568 INFO L93 Difference]: Finished difference Result 524 states and 1067 transitions. [2021-06-12 20:47:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:47:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 26 [2021-06-12 20:47:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:39,571 INFO L225 Difference]: With dead ends: 524 [2021-06-12 20:47:39,571 INFO L226 Difference]: Without dead ends: 503 [2021-06-12 20:47:39,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 20:47:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-12 20:47:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 272. [2021-06-12 20:47:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.992619926199262) internal successors, (540), 271 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 540 transitions. [2021-06-12 20:47:39,578 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 540 transitions. Word has length 26 [2021-06-12 20:47:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:39,578 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 540 transitions. [2021-06-12 20:47:39,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 20:47:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 540 transitions. [2021-06-12 20:47:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 20:47:39,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:39,579 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:39,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 20:47:39,793 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:39,793 INFO L82 PathProgramCache]: Analyzing trace with hash -931564597, now seen corresponding path program 16 times [2021-06-12 20:47:39,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:39,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122151903] [2021-06-12 20:47:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:39,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:39,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:39,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122151903] [2021-06-12 20:47:39,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122151903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:39,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977117576] [2021-06-12 20:47:39,989 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 20:47:40,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:40,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:40,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 20:47:40,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:40,181 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-06-12 20:47:40,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 25 [2021-06-12 20:47:40,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:40,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:40,187 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 20:47:40,187 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-06-12 20:47:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:40,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977117576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:40,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:40,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 20:47:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039743679] [2021-06-12 20:47:40,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 20:47:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:40,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 20:47:40,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 20:47:40,202 INFO L87 Difference]: Start difference. First operand 272 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:40,422 INFO L93 Difference]: Finished difference Result 369 states and 744 transitions. [2021-06-12 20:47:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 20:47:40,422 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 20:47:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:40,423 INFO L225 Difference]: With dead ends: 369 [2021-06-12 20:47:40,424 INFO L226 Difference]: Without dead ends: 354 [2021-06-12 20:47:40,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-12 20:47:40,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-12 20:47:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 279. [2021-06-12 20:47:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.9964028776978417) internal successors, (555), 278 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 555 transitions. [2021-06-12 20:47:40,430 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 555 transitions. Word has length 26 [2021-06-12 20:47:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:40,430 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 555 transitions. [2021-06-12 20:47:40,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 555 transitions. [2021-06-12 20:47:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 20:47:40,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:40,431 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:40,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 20:47:40,653 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:40,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:40,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1396364564, now seen corresponding path program 17 times [2021-06-12 20:47:40,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:40,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095201317] [2021-06-12 20:47:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:40,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:40,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095201317] [2021-06-12 20:47:40,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095201317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:40,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770160452] [2021-06-12 20:47:40,684 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 20:47:40,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:47:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 20:47:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:40,756 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:40,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770160452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:40,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:40,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 20:47:40,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427643342] [2021-06-12 20:47:40,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 20:47:40,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:40,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 20:47:40,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:47:40,757 INFO L87 Difference]: Start difference. First operand 279 states and 555 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 20:47:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:40,779 INFO L93 Difference]: Finished difference Result 479 states and 948 transitions. [2021-06-12 20:47:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 20:47:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 28 [2021-06-12 20:47:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:40,781 INFO L225 Difference]: With dead ends: 479 [2021-06-12 20:47:40,781 INFO L226 Difference]: Without dead ends: 472 [2021-06-12 20:47:40,781 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-12 20:47:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-12 20:47:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 320. [2021-06-12 20:47:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0250783699059562) internal successors, (646), 319 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 646 transitions. [2021-06-12 20:47:40,788 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 646 transitions. Word has length 28 [2021-06-12 20:47:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:40,788 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 646 transitions. [2021-06-12 20:47:40,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 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 20:47:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 646 transitions. [2021-06-12 20:47:40,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:40,789 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:40,789 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:41,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 20:47:41,003 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:41,003 INFO L82 PathProgramCache]: Analyzing trace with hash -160566182, now seen corresponding path program 18 times [2021-06-12 20:47:41,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:41,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238053812] [2021-06-12 20:47:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:47:41,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238053812] [2021-06-12 20:47:41,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238053812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:41,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462016326] [2021-06-12 20:47:41,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:47:41,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:41,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:41,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:41,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:41,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:41,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:41,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:41,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:41,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:41,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:41,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:41,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462016326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:41,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:41,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-12 20:47:41,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716622511] [2021-06-12 20:47:41,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:41,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:41,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:41,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:41,649 INFO L87 Difference]: Start difference. First operand 320 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:41,863 INFO L93 Difference]: Finished difference Result 708 states and 1436 transitions. [2021-06-12 20:47:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:47:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:47:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:41,866 INFO L225 Difference]: With dead ends: 708 [2021-06-12 20:47:41,866 INFO L226 Difference]: Without dead ends: 588 [2021-06-12 20:47:41,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-06-12 20:47:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 392. [2021-06-12 20:47:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-06-12 20:47:41,876 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 31 [2021-06-12 20:47:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:41,876 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-06-12 20:47:41,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-06-12 20:47:41,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:41,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:41,877 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:42,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 20:47:42,101 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:42,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:42,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1308942062, now seen corresponding path program 19 times [2021-06-12 20:47:42,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:42,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018777196] [2021-06-12 20:47:42,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:42,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:42,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018777196] [2021-06-12 20:47:42,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018777196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:42,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483525816] [2021-06-12 20:47:42,338 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 20:47:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:42,364 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:42,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:42,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:42,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:42,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:42,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:42,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:42,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:42,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:42,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:42,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483525816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:42,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:42,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:42,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188753256] [2021-06-12 20:47:42,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:42,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:42,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:42,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:42,741 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:42,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:42,971 INFO L93 Difference]: Finished difference Result 810 states and 1669 transitions. [2021-06-12 20:47:42,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:47:42,971 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:42,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:42,974 INFO L225 Difference]: With dead ends: 810 [2021-06-12 20:47:42,974 INFO L226 Difference]: Without dead ends: 757 [2021-06-12 20:47:42,975 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:42,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-12 20:47:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 413. [2021-06-12 20:47:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0072815533980584) internal successors, (827), 412 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 827 transitions. [2021-06-12 20:47:42,984 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 827 transitions. Word has length 31 [2021-06-12 20:47:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:42,984 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 827 transitions. [2021-06-12 20:47:42,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 827 transitions. [2021-06-12 20:47:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:42,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:42,985 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:43,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 20:47:43,201 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1649221820, now seen corresponding path program 20 times [2021-06-12 20:47:43,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:43,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792988363] [2021-06-12 20:47:43,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:43,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:43,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792988363] [2021-06-12 20:47:43,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792988363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:43,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587413424] [2021-06-12 20:47:43,430 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 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 20:47:43,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:43,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:43,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:43,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:43,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:43,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:43,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:43,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:43,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:43,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:43,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:43,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:43,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587413424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:43,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:43,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:43,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499417483] [2021-06-12 20:47:43,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:43,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:43,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:43,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:43,897 INFO L87 Difference]: Start difference. First operand 413 states and 827 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:44,242 INFO L93 Difference]: Finished difference Result 880 states and 1806 transitions. [2021-06-12 20:47:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:47:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:44,245 INFO L225 Difference]: With dead ends: 880 [2021-06-12 20:47:44,245 INFO L226 Difference]: Without dead ends: 824 [2021-06-12 20:47:44,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:47:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-06-12 20:47:44,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 425. [2021-06-12 20:47:44,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:44,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-06-12 20:47:44,255 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 31 [2021-06-12 20:47:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:44,255 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-06-12 20:47:44,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-06-12 20:47:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:44,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:44,256 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:44,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:44,469 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:44,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1866596212, now seen corresponding path program 21 times [2021-06-12 20:47:44,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:44,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929896861] [2021-06-12 20:47:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:44,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929896861] [2021-06-12 20:47:44,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929896861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:44,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267257390] [2021-06-12 20:47:44,696 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 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 20:47:44,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:47:44,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:44,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:44,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:45,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:45,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:45,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:45,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:45,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:45,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:45,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:45,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:45,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267257390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:45,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:45,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:45,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470585391] [2021-06-12 20:47:45,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:45,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:45,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:45,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:45,166 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:45,385 INFO L93 Difference]: Finished difference Result 809 states and 1648 transitions. [2021-06-12 20:47:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:47:45,386 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:45,388 INFO L225 Difference]: With dead ends: 809 [2021-06-12 20:47:45,388 INFO L226 Difference]: Without dead ends: 769 [2021-06-12 20:47:45,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:47:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-12 20:47:45,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-06-12 20:47:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.011709601873536) internal successors, (859), 427 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 859 transitions. [2021-06-12 20:47:45,396 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 859 transitions. Word has length 31 [2021-06-12 20:47:45,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:45,396 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 859 transitions. [2021-06-12 20:47:45,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 859 transitions. [2021-06-12 20:47:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:45,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:45,397 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:45,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 20:47:45,614 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash 865807024, now seen corresponding path program 22 times [2021-06-12 20:47:45,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:45,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141652642] [2021-06-12 20:47:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 20:47:45,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:45,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141652642] [2021-06-12 20:47:45,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141652642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:45,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230377312] [2021-06-12 20:47:45,798 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 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 20:47:45,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:45,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:45,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:45,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:46,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:46,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:46,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:46,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:46,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:46,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:46,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:46,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:46,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:46,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230377312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:46,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:46,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-06-12 20:47:46,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88713117] [2021-06-12 20:47:46,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:47:46,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:46,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:47:46,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:47:46,156 INFO L87 Difference]: Start difference. First operand 428 states and 859 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:46,394 INFO L93 Difference]: Finished difference Result 853 states and 1716 transitions. [2021-06-12 20:47:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:47:46,395 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:47:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:46,396 INFO L225 Difference]: With dead ends: 853 [2021-06-12 20:47:46,396 INFO L226 Difference]: Without dead ends: 708 [2021-06-12 20:47:46,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:46,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-12 20:47:46,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 464. [2021-06-12 20:47:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.9978401727861772) internal successors, (925), 463 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 925 transitions. [2021-06-12 20:47:46,405 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 925 transitions. Word has length 31 [2021-06-12 20:47:46,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:46,405 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 925 transitions. [2021-06-12 20:47:46,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:46,405 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 925 transitions. [2021-06-12 20:47:46,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:46,406 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:46,406 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:46,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:46,617 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:46,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:46,617 INFO L82 PathProgramCache]: Analyzing trace with hash -282568856, now seen corresponding path program 23 times [2021-06-12 20:47:46,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:46,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921785733] [2021-06-12 20:47:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:47:46,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:46,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921785733] [2021-06-12 20:47:46,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921785733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:46,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874365495] [2021-06-12 20:47:46,821 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 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 20:47:46,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:47:46,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:46,848 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:46,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:47,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:47,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:47,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:47,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:47,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:47,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:47,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:47,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:47,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:47,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874365495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:47,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:47,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 20:47:47,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764913071] [2021-06-12 20:47:47,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:47,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:47,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:47,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:47,207 INFO L87 Difference]: Start difference. First operand 464 states and 925 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 20:47:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:47,407 INFO L93 Difference]: Finished difference Result 925 states and 1897 transitions. [2021-06-12 20:47:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:47:47,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 31 [2021-06-12 20:47:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:47,410 INFO L225 Difference]: With dead ends: 925 [2021-06-12 20:47:47,410 INFO L226 Difference]: Without dead ends: 872 [2021-06-12 20:47:47,410 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 417.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-06-12 20:47:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 461. [2021-06-12 20:47:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.9978260869565216) internal successors, (919), 460 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:47,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 919 transitions. [2021-06-12 20:47:47,419 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 919 transitions. Word has length 31 [2021-06-12 20:47:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:47,420 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 919 transitions. [2021-06-12 20:47:47,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 20:47:47,420 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 919 transitions. [2021-06-12 20:47:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:47,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:47,421 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:47,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 20:47:47,641 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1619372270, now seen corresponding path program 24 times [2021-06-12 20:47:47,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:47,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201255222] [2021-06-12 20:47:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:47,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201255222] [2021-06-12 20:47:47,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201255222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:47,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643657829] [2021-06-12 20:47:47,850 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 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 20:47:47,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:47,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:47,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:47,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:48,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:48,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:48,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:48,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:48,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:48,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:48,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:48,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:48,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643657829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:48,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:48,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-12 20:47:48,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960569690] [2021-06-12 20:47:48,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:48,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:48,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:48,205 INFO L87 Difference]: Start difference. First operand 461 states and 919 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:48,511 INFO L93 Difference]: Finished difference Result 962 states and 1970 transitions. [2021-06-12 20:47:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:47:48,511 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:47:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:48,513 INFO L225 Difference]: With dead ends: 962 [2021-06-12 20:47:48,514 INFO L226 Difference]: Without dead ends: 906 [2021-06-12 20:47:48,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:48,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-12 20:47:48,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 458. [2021-06-12 20:47:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.9978118161925602) internal successors, (913), 457 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 913 transitions. [2021-06-12 20:47:48,523 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 913 transitions. Word has length 31 [2021-06-12 20:47:48,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:48,523 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 913 transitions. [2021-06-12 20:47:48,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 913 transitions. [2021-06-12 20:47:48,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:48,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:48,524 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:48,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:48,733 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:48,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1401997878, now seen corresponding path program 25 times [2021-06-12 20:47:48,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:48,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877804871] [2021-06-12 20:47:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:48,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:48,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877804871] [2021-06-12 20:47:48,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877804871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:48,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137347134] [2021-06-12 20:47:48,982 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 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 20:47:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:49,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:49,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:49,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:49,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:49,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:49,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:49,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:49,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:49,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:49,415 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:49,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137347134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:49,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:49,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:49,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850722932] [2021-06-12 20:47:49,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:49,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:49,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:49,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:49,416 INFO L87 Difference]: Start difference. First operand 458 states and 913 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:49,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:49,652 INFO L93 Difference]: Finished difference Result 936 states and 1914 transitions. [2021-06-12 20:47:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:47:49,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:49,655 INFO L225 Difference]: With dead ends: 936 [2021-06-12 20:47:49,655 INFO L226 Difference]: Without dead ends: 877 [2021-06-12 20:47:49,656 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-06-12 20:47:49,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 434. [2021-06-12 20:47:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0115473441108547) internal successors, (871), 433 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 871 transitions. [2021-06-12 20:47:49,663 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 871 transitions. Word has length 31 [2021-06-12 20:47:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:49,663 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 871 transitions. [2021-06-12 20:47:49,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 871 transitions. [2021-06-12 20:47:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:49,664 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:49,664 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:49,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 20:47:49,869 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1874857228, now seen corresponding path program 26 times [2021-06-12 20:47:49,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:49,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194288896] [2021-06-12 20:47:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:50,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:50,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194288896] [2021-06-12 20:47:50,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194288896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:50,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929811574] [2021-06-12 20:47:50,085 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 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 20:47:50,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:50,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:50,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:50,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:50,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:50,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:50,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:50,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:50,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929811574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:50,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:50,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:50,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524819440] [2021-06-12 20:47:50,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:50,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:50,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:50,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:50,486 INFO L87 Difference]: Start difference. First operand 434 states and 871 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:50,719 INFO L93 Difference]: Finished difference Result 947 states and 1941 transitions. [2021-06-12 20:47:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:47:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:50,722 INFO L225 Difference]: With dead ends: 947 [2021-06-12 20:47:50,722 INFO L226 Difference]: Without dead ends: 905 [2021-06-12 20:47:50,723 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 449.1ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-12 20:47:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 431. [2021-06-12 20:47:50,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0186046511627906) internal successors, (868), 430 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:50,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 868 transitions. [2021-06-12 20:47:50,731 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 868 transitions. Word has length 31 [2021-06-12 20:47:50,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:50,731 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 868 transitions. [2021-06-12 20:47:50,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:50,731 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 868 transitions. [2021-06-12 20:47:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:50,732 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:50,732 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:50,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:50,945 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash 615761780, now seen corresponding path program 27 times [2021-06-12 20:47:50,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:50,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046377071] [2021-06-12 20:47:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:51,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:51,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046377071] [2021-06-12 20:47:51,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046377071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:51,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502491442] [2021-06-12 20:47:51,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:47:51,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:47:51,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:51,216 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:51,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:51,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:51,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:51,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:51,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 32 [2021-06-12 20:47:51,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:51,679 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-12 20:47:51,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:51,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-06-12 20:47:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:51,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502491442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:51,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:51,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:51,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615777481] [2021-06-12 20:47:51,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:51,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:51,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:51,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:51,690 INFO L87 Difference]: Start difference. First operand 431 states and 868 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:51,991 INFO L93 Difference]: Finished difference Result 780 states and 1574 transitions. [2021-06-12 20:47:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:47:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:51,993 INFO L225 Difference]: With dead ends: 780 [2021-06-12 20:47:51,994 INFO L226 Difference]: Without dead ends: 757 [2021-06-12 20:47:51,994 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:47:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-06-12 20:47:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 470. [2021-06-12 20:47:52,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-06-12 20:47:52,001 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-06-12 20:47:52,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:52,001 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-06-12 20:47:52,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-06-12 20:47:52,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:52,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:52,002 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:52,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 20:47:52,205 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:52,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:52,205 INFO L82 PathProgramCache]: Analyzing trace with hash 833136172, now seen corresponding path program 28 times [2021-06-12 20:47:52,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:52,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841021465] [2021-06-12 20:47:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:52,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:52,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841021465] [2021-06-12 20:47:52,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841021465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:52,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580291729] [2021-06-12 20:47:52,433 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 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 20:47:52,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:52,466 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:52,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:52,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:52,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:52,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:52,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:52,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:52,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580291729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:52,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:52,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:52,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014099592] [2021-06-12 20:47:52,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:52,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:52,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:52,834 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:53,147 INFO L93 Difference]: Finished difference Result 833 states and 1680 transitions. [2021-06-12 20:47:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:47:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:53,150 INFO L225 Difference]: With dead ends: 833 [2021-06-12 20:47:53,151 INFO L226 Difference]: Without dead ends: 812 [2021-06-12 20:47:53,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:47:53,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-06-12 20:47:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 470. [2021-06-12 20:47:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:53,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-06-12 20:47:53,159 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-06-12 20:47:53,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:53,159 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-06-12 20:47:53,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:53,160 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-06-12 20:47:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:53,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:53,161 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:53,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:53,378 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:53,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:53,378 INFO L82 PathProgramCache]: Analyzing trace with hash -167653016, now seen corresponding path program 29 times [2021-06-12 20:47:53,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:53,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982837404] [2021-06-12 20:47:53,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:47:53,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:53,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982837404] [2021-06-12 20:47:53,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982837404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:53,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549102761] [2021-06-12 20:47:53,595 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:47:53,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:47:53,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:53,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:53,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:54,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:54,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:54,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:54,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 32 [2021-06-12 20:47:54,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:54,057 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-12 20:47:54,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:54,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-06-12 20:47:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:54,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549102761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:54,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:54,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 20:47:54,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412834469] [2021-06-12 20:47:54,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:54,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:54,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:54,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:54,069 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 20:47:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:54,523 INFO L93 Difference]: Finished difference Result 1001 states and 2003 transitions. [2021-06-12 20:47:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:47:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 31 [2021-06-12 20:47:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:54,526 INFO L225 Difference]: With dead ends: 1001 [2021-06-12 20:47:54,526 INFO L226 Difference]: Without dead ends: 828 [2021-06-12 20:47:54,526 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:47:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-06-12 20:47:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 512. [2021-06-12 20:47:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.9921722113502935) internal successors, (1018), 511 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:54,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1018 transitions. [2021-06-12 20:47:54,534 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1018 transitions. Word has length 31 [2021-06-12 20:47:54,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:54,535 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1018 transitions. [2021-06-12 20:47:54,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 20:47:54,535 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1018 transitions. [2021-06-12 20:47:54,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:54,536 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:54,536 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:54,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-12 20:47:54,760 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1642134986, now seen corresponding path program 30 times [2021-06-12 20:47:54,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:54,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332132183] [2021-06-12 20:47:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:54,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:54,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332132183] [2021-06-12 20:47:54,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332132183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:54,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063883377] [2021-06-12 20:47:54,962 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 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 20:47:54,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 20:47:54,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:54,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:54,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:55,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:55,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:55,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:55,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:55,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:55,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:55,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:55,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:55,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:55,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063883377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:55,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:55,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-12 20:47:55,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894743685] [2021-06-12 20:47:55,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:55,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:55,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:55,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:55,339 INFO L87 Difference]: Start difference. First operand 512 states and 1018 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:55,583 INFO L93 Difference]: Finished difference Result 1117 states and 2272 transitions. [2021-06-12 20:47:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 20:47:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:47:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:55,586 INFO L225 Difference]: With dead ends: 1117 [2021-06-12 20:47:55,586 INFO L226 Difference]: Without dead ends: 1061 [2021-06-12 20:47:55,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-06-12 20:47:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 539. [2021-06-12 20:47:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.986988847583643) internal successors, (1069), 538 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1069 transitions. [2021-06-12 20:47:55,596 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1069 transitions. Word has length 31 [2021-06-12 20:47:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:55,596 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1069 transitions. [2021-06-12 20:47:55,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:55,597 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1069 transitions. [2021-06-12 20:47:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:55,597 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:55,597 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:55,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-12 20:47:55,813 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1859509378, now seen corresponding path program 31 times [2021-06-12 20:47:55,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:55,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013680240] [2021-06-12 20:47:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:56,050 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:56,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:56,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013680240] [2021-06-12 20:47:56,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013680240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:56,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141856536] [2021-06-12 20:47:56,050 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 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 20:47:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:56,089 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:56,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:56,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:56,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:56,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:56,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:56,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:56,480 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:56,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141856536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:56,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:56,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:56,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247158883] [2021-06-12 20:47:56,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:56,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:56,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:56,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:56,491 INFO L87 Difference]: Start difference. First operand 539 states and 1069 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:56,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:56,765 INFO L93 Difference]: Finished difference Result 1088 states and 2213 transitions. [2021-06-12 20:47:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:47:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:56,768 INFO L225 Difference]: With dead ends: 1088 [2021-06-12 20:47:56,768 INFO L226 Difference]: Without dead ends: 1029 [2021-06-12 20:47:56,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 499.8ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-06-12 20:47:56,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 536. [2021-06-12 20:47:56,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.9869158878504674) internal successors, (1063), 535 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1063 transitions. [2021-06-12 20:47:56,777 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1063 transitions. Word has length 31 [2021-06-12 20:47:56,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:56,777 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1063 transitions. [2021-06-12 20:47:56,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:56,777 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1063 transitions. [2021-06-12 20:47:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:56,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:56,778 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:56,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 20:47:56,989 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:56,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1386650028, now seen corresponding path program 32 times [2021-06-12 20:47:56,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:56,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293766762] [2021-06-12 20:47:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:57,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:57,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293766762] [2021-06-12 20:47:57,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293766762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:57,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462315095] [2021-06-12 20:47:57,192 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 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 20:47:57,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:47:57,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:57,220 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:57,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:57,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:57,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:57,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:57,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:57,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:57,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:57,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:57,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:57,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462315095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:57,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:57,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:47:57,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474494120] [2021-06-12 20:47:57,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:47:57,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:57,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:47:57,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:47:57,588 INFO L87 Difference]: Start difference. First operand 536 states and 1063 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:57,883 INFO L93 Difference]: Finished difference Result 1059 states and 2151 transitions. [2021-06-12 20:47:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:47:57,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:47:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:57,886 INFO L225 Difference]: With dead ends: 1059 [2021-06-12 20:47:57,886 INFO L226 Difference]: Without dead ends: 1017 [2021-06-12 20:47:57,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:47:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-06-12 20:47:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 533. [2021-06-12 20:47:57,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.986842105263158) internal successors, (1057), 532 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1057 transitions. [2021-06-12 20:47:57,893 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1057 transitions. Word has length 31 [2021-06-12 20:47:57,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:57,893 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1057 transitions. [2021-06-12 20:47:57,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:47:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1057 transitions. [2021-06-12 20:47:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:57,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:57,895 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:58,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 20:47:58,100 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:58,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:58,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1919082992, now seen corresponding path program 33 times [2021-06-12 20:47:58,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:58,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412620215] [2021-06-12 20:47:58,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:47:58,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:58,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412620215] [2021-06-12 20:47:58,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412620215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:58,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028260853] [2021-06-12 20:47:58,275 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 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 20:47:58,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:47:58,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:58,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:58,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:58,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:58,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:58,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:58,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:58,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:58,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:58,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:58,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028260853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:58,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:58,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-12 20:47:58,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860357115] [2021-06-12 20:47:58,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:47:58,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:58,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:47:58,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:58,643 INFO L87 Difference]: Start difference. First operand 533 states and 1057 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 20:47:58,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:58,849 INFO L93 Difference]: Finished difference Result 1026 states and 2079 transitions. [2021-06-12 20:47:58,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:47:58,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 31 [2021-06-12 20:47:58,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:58,852 INFO L225 Difference]: With dead ends: 1026 [2021-06-12 20:47:58,852 INFO L226 Difference]: Without dead ends: 938 [2021-06-12 20:47:58,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:47:58,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-06-12 20:47:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 575. [2021-06-12 20:47:58,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.9825783972125435) internal successors, (1138), 574 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1138 transitions. [2021-06-12 20:47:58,862 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1138 transitions. Word has length 31 [2021-06-12 20:47:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:58,862 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1138 transitions. [2021-06-12 20:47:58,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 20:47:58,863 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1138 transitions. [2021-06-12 20:47:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:58,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:58,864 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:47:59,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 20:47:59,085 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:47:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:47:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash -566096302, now seen corresponding path program 34 times [2021-06-12 20:47:59,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:47:59,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742741038] [2021-06-12 20:47:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:47:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:47:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:59,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:47:59,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742741038] [2021-06-12 20:47:59,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742741038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:59,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403433728] [2021-06-12 20:47:59,278 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 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 20:47:59,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:47:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:47:59,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:47:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:47:59,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:59,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:59,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:47:59,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:47:59,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:47:59,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:47:59,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:47:59,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:47:59,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:47:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:47:59,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403433728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:47:59,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:47:59,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-06-12 20:47:59,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038554628] [2021-06-12 20:47:59,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:47:59,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:47:59,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:47:59,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:59,673 INFO L87 Difference]: Start difference. First operand 575 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:47:59,910 INFO L93 Difference]: Finished difference Result 1110 states and 2251 transitions. [2021-06-12 20:47:59,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:47:59,910 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:47:59,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:47:59,913 INFO L225 Difference]: With dead ends: 1110 [2021-06-12 20:47:59,913 INFO L226 Difference]: Without dead ends: 1057 [2021-06-12 20:47:59,913 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 417.4ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:47:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-12 20:47:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 563. [2021-06-12 20:47:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.9822064056939501) internal successors, (1114), 562 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1114 transitions. [2021-06-12 20:47:59,923 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1114 transitions. Word has length 31 [2021-06-12 20:47:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:47:59,923 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1114 transitions. [2021-06-12 20:47:59,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:47:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1114 transitions. [2021-06-12 20:47:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:47:59,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:47:59,924 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:00,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 20:48:00,133 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:00,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:00,133 INFO L82 PathProgramCache]: Analyzing trace with hash -348721910, now seen corresponding path program 35 times [2021-06-12 20:48:00,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:00,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712848480] [2021-06-12 20:48:00,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:00,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:00,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712848480] [2021-06-12 20:48:00,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712848480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:00,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848583238] [2021-06-12 20:48:00,384 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 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 20:48:00,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:48:00,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:00,410 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 20:48:00,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:00,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:00,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:00,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:00,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:00,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-06-12 20:48:00,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:00,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:00,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:00,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:9 [2021-06-12 20:48:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:00,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848583238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:00,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:00,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-06-12 20:48:00,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529744417] [2021-06-12 20:48:00,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:48:00,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:00,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:48:00,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:48:00,809 INFO L87 Difference]: Start difference. First operand 563 states and 1114 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:01,819 INFO L93 Difference]: Finished difference Result 1236 states and 2487 transitions. [2021-06-12 20:48:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:48:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:48:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:01,821 INFO L225 Difference]: With dead ends: 1236 [2021-06-12 20:48:01,821 INFO L226 Difference]: Without dead ends: 1116 [2021-06-12 20:48:01,821 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1035.1ms TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:48:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-06-12 20:48:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 578. [2021-06-12 20:48:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.977469670710572) internal successors, (1141), 577 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1141 transitions. [2021-06-12 20:48:01,830 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1141 transitions. Word has length 31 [2021-06-12 20:48:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:01,830 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1141 transitions. [2021-06-12 20:48:01,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1141 transitions. [2021-06-12 20:48:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:01,831 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:01,831 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:02,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-12 20:48:02,037 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:02,037 INFO L82 PathProgramCache]: Analyzing trace with hash -821581260, now seen corresponding path program 36 times [2021-06-12 20:48:02,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:02,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955233282] [2021-06-12 20:48:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:02,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:02,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:02,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955233282] [2021-06-12 20:48:02,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955233282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:02,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813468372] [2021-06-12 20:48:02,251 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 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 20:48:02,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:48:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:02,277 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 20:48:02,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:02,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:02,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:02,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:02,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:02,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:02,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:02,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:02,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:02,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:02,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813468372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:02,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:02,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:48:02,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653830852] [2021-06-12 20:48:02,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:48:02,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:02,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:48:02,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:02,685 INFO L87 Difference]: Start difference. First operand 578 states and 1141 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:48:02,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:02,859 INFO L93 Difference]: Finished difference Result 1207 states and 2430 transitions. [2021-06-12 20:48:02,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:48:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:48:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:02,861 INFO L225 Difference]: With dead ends: 1207 [2021-06-12 20:48:02,861 INFO L226 Difference]: Without dead ends: 1075 [2021-06-12 20:48:02,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-12 20:48:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 614. [2021-06-12 20:48:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.9804241435562806) internal successors, (1214), 613 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1214 transitions. [2021-06-12 20:48:02,870 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1214 transitions. Word has length 31 [2021-06-12 20:48:02,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:02,870 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1214 transitions. [2021-06-12 20:48:02,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:48:02,870 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1214 transitions. [2021-06-12 20:48:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:02,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:02,871 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:03,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:03,093 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:03,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1916779244, now seen corresponding path program 37 times [2021-06-12 20:48:03,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:03,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694117074] [2021-06-12 20:48:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:03,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:03,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694117074] [2021-06-12 20:48:03,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694117074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:03,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079665665] [2021-06-12 20:48:03,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:48:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:03,362 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:03,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:03,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:03,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:03,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:03,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:03,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:03,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:03,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:03,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:03,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079665665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:03,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:03,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-12 20:48:03,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132485031] [2021-06-12 20:48:03,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 20:48:03,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:03,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 20:48:03,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:03,799 INFO L87 Difference]: Start difference. First operand 614 states and 1214 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:48:04,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:04,166 INFO L93 Difference]: Finished difference Result 1033 states and 2073 transitions. [2021-06-12 20:48:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:04,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 31 [2021-06-12 20:48:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:04,168 INFO L225 Difference]: With dead ends: 1033 [2021-06-12 20:48:04,168 INFO L226 Difference]: Without dead ends: 1010 [2021-06-12 20:48:04,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 493.4ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-06-12 20:48:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 624. [2021-06-12 20:48:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.9823434991974318) internal successors, (1235), 623 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1235 transitions. [2021-06-12 20:48:04,176 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1235 transitions. Word has length 31 [2021-06-12 20:48:04,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:04,177 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1235 transitions. [2021-06-12 20:48:04,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 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 20:48:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1235 transitions. [2021-06-12 20:48:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:04,178 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:04,178 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:04,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:04,397 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1512927684, now seen corresponding path program 38 times [2021-06-12 20:48:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:04,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135188555] [2021-06-12 20:48:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:04,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:04,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135188555] [2021-06-12 20:48:04,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135188555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:04,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839044356] [2021-06-12 20:48:04,629 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 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 20:48:04,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:04,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:04,653 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:04,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:04,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:04,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:04,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:04,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:04,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:04,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:04,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:04,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:04,934 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:04,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:04,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:04,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:04,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839044356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:04,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:04,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 20:48:04,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797406246] [2021-06-12 20:48:04,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:04,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:04,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:04,953 INFO L87 Difference]: Start difference. First operand 624 states and 1235 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:05,275 INFO L93 Difference]: Finished difference Result 1316 states and 2627 transitions. [2021-06-12 20:48:05,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:48:05,275 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-12 20:48:05,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:05,277 INFO L225 Difference]: With dead ends: 1316 [2021-06-12 20:48:05,277 INFO L226 Difference]: Without dead ends: 1163 [2021-06-12 20:48:05,277 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 477.2ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:48:05,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-06-12 20:48:05,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 717. [2021-06-12 20:48:05,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.9594972067039107) internal successors, (1403), 716 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1403 transitions. [2021-06-12 20:48:05,287 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1403 transitions. Word has length 31 [2021-06-12 20:48:05,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:05,287 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1403 transitions. [2021-06-12 20:48:05,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:05,287 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1403 transitions. [2021-06-12 20:48:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:05,288 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:05,288 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:05,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:05,505 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash 514234710, now seen corresponding path program 39 times [2021-06-12 20:48:05,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:05,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523628430] [2021-06-12 20:48:05,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:05,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523628430] [2021-06-12 20:48:05,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523628430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:05,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263635162] [2021-06-12 20:48:05,745 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 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 20:48:05,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 20:48:05,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:05,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:06,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:06,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:06,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:06,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:06,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:06,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:06,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:06,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:06,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:06,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:06,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:06,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:06,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:06,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:06,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263635162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:06,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:06,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 20:48:06,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578855648] [2021-06-12 20:48:06,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:06,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:06,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:06,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:06,079 INFO L87 Difference]: Start difference. First operand 717 states and 1403 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:06,329 INFO L93 Difference]: Finished difference Result 1252 states and 2517 transitions. [2021-06-12 20:48:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:06,329 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-12 20:48:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:06,331 INFO L225 Difference]: With dead ends: 1252 [2021-06-12 20:48:06,331 INFO L226 Difference]: Without dead ends: 1197 [2021-06-12 20:48:06,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-06-12 20:48:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 762. [2021-06-12 20:48:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.9540078843626807) internal successors, (1487), 761 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1487 transitions. [2021-06-12 20:48:06,339 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1487 transitions. Word has length 31 [2021-06-12 20:48:06,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:06,339 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1487 transitions. [2021-06-12 20:48:06,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1487 transitions. [2021-06-12 20:48:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:06,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:06,341 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:06,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 20:48:06,557 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:06,557 INFO L82 PathProgramCache]: Analyzing trace with hash -486554478, now seen corresponding path program 40 times [2021-06-12 20:48:06,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:06,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846299828] [2021-06-12 20:48:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:06,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:06,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846299828] [2021-06-12 20:48:06,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846299828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:06,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600158202] [2021-06-12 20:48:06,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:48:06,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:06,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:06,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:06,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:07,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:07,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:07,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:07,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:07,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:07,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:07,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:07,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:07,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600158202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:07,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:07,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 20:48:07,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797424620] [2021-06-12 20:48:07,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:07,093 INFO L87 Difference]: Start difference. First operand 762 states and 1487 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:07,479 INFO L93 Difference]: Finished difference Result 1353 states and 2677 transitions. [2021-06-12 20:48:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:48:07,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:48:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:07,481 INFO L225 Difference]: With dead ends: 1353 [2021-06-12 20:48:07,481 INFO L226 Difference]: Without dead ends: 1168 [2021-06-12 20:48:07,481 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:48:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-06-12 20:48:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 678. [2021-06-12 20:48:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9748892171344166) internal successors, (1337), 677 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1337 transitions. [2021-06-12 20:48:07,490 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1337 transitions. Word has length 31 [2021-06-12 20:48:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:07,490 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 1337 transitions. [2021-06-12 20:48:07,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1337 transitions. [2021-06-12 20:48:07,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:07,492 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:07,492 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:07,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:07,715 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:07,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:07,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1540607916, now seen corresponding path program 41 times [2021-06-12 20:48:07,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:07,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549429471] [2021-06-12 20:48:07,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:07,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549429471] [2021-06-12 20:48:07,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549429471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:07,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957578658] [2021-06-12 20:48:07,917 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 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 20:48:07,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 20:48:07,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:07,943 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:08,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:08,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:08,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:08,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:08,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:08,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:08,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:08,296 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:08,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957578658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:08,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:08,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 20:48:08,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431605378] [2021-06-12 20:48:08,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:08,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:08,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:08,298 INFO L87 Difference]: Start difference. First operand 678 states and 1337 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:08,522 INFO L93 Difference]: Finished difference Result 1283 states and 2599 transitions. [2021-06-12 20:48:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:48:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-12 20:48:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:08,524 INFO L225 Difference]: With dead ends: 1283 [2021-06-12 20:48:08,524 INFO L226 Difference]: Without dead ends: 1224 [2021-06-12 20:48:08,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:08,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-06-12 20:48:08,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 681. [2021-06-12 20:48:08,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.975) internal successors, (1343), 680 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1343 transitions. [2021-06-12 20:48:08,532 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1343 transitions. Word has length 31 [2021-06-12 20:48:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:08,532 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1343 transitions. [2021-06-12 20:48:08,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1343 transitions. [2021-06-12 20:48:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:08,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:08,533 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:08,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:08,734 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1067748566, now seen corresponding path program 42 times [2021-06-12 20:48:08,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:08,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315873962] [2021-06-12 20:48:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:08,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:08,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315873962] [2021-06-12 20:48:08,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315873962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:08,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607353526] [2021-06-12 20:48:08,926 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 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 20:48:08,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:48:08,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:08,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:08,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:09,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:09,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:09,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:09,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:09,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:09,295 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:09,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:09,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:09,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607353526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:09,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:09,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 20:48:09,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345460938] [2021-06-12 20:48:09,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:09,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:09,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:09,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:09,305 INFO L87 Difference]: Start difference. First operand 681 states and 1343 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:09,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:09,554 INFO L93 Difference]: Finished difference Result 1174 states and 2374 transitions. [2021-06-12 20:48:09,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 20:48:09,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-12 20:48:09,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:09,555 INFO L225 Difference]: With dead ends: 1174 [2021-06-12 20:48:09,555 INFO L226 Difference]: Without dead ends: 1132 [2021-06-12 20:48:09,556 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-12 20:48:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-06-12 20:48:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 684. [2021-06-12 20:48:09,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.9751098096632504) internal successors, (1349), 683 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:09,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1349 transitions. [2021-06-12 20:48:09,563 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1349 transitions. Word has length 31 [2021-06-12 20:48:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:09,563 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1349 transitions. [2021-06-12 20:48:09,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1349 transitions. [2021-06-12 20:48:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:09,565 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:09,565 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:09,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-12 20:48:09,769 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:09,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1600181530, now seen corresponding path program 43 times [2021-06-12 20:48:09,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:09,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879061623] [2021-06-12 20:48:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:09,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:09,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879061623] [2021-06-12 20:48:09,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879061623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:09,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480433232] [2021-06-12 20:48:09,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:48:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:10,012 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:10,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:10,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:10,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:10,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:10,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:10,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:10,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:10,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480433232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:10,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:10,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 20:48:10,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857096262] [2021-06-12 20:48:10,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:10,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:10,376 INFO L87 Difference]: Start difference. First operand 684 states and 1349 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:10,610 INFO L93 Difference]: Finished difference Result 1381 states and 2772 transitions. [2021-06-12 20:48:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:48:10,611 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:48:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:10,613 INFO L225 Difference]: With dead ends: 1381 [2021-06-12 20:48:10,613 INFO L226 Difference]: Without dead ends: 1277 [2021-06-12 20:48:10,613 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-06-12 20:48:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 759. [2021-06-12 20:48:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.9736147757255937) internal successors, (1496), 758 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1496 transitions. [2021-06-12 20:48:10,622 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1496 transitions. Word has length 31 [2021-06-12 20:48:10,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:10,622 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 1496 transitions. [2021-06-12 20:48:10,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:10,622 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1496 transitions. [2021-06-12 20:48:10,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:10,623 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:10,623 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:10,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-12 20:48:10,827 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:10,828 INFO L82 PathProgramCache]: Analyzing trace with hash -667623372, now seen corresponding path program 44 times [2021-06-12 20:48:10,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:10,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859852926] [2021-06-12 20:48:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:11,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:11,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859852926] [2021-06-12 20:48:11,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859852926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:11,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610397854] [2021-06-12 20:48:11,063 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 20:48:11,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:11,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:11,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:11,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:11,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:11,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:11,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:11,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:11,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:11,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:11,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:11,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:11,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:11,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:11,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:11,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:11,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:11,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:11,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610397854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:11,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:11,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 20:48:11,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151076943] [2021-06-12 20:48:11,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:11,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:11,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:11,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:11,496 INFO L87 Difference]: Start difference. First operand 759 states and 1496 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:11,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:11,816 INFO L93 Difference]: Finished difference Result 1359 states and 2747 transitions. [2021-06-12 20:48:11,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:11,816 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-12 20:48:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:11,818 INFO L225 Difference]: With dead ends: 1359 [2021-06-12 20:48:11,818 INFO L226 Difference]: Without dead ends: 1304 [2021-06-12 20:48:11,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:11,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-12 20:48:11,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 774. [2021-06-12 20:48:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-12 20:48:11,827 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-12 20:48:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:11,827 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-12 20:48:11,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:11,827 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-12 20:48:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:11,828 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:11,828 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:12,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-12 20:48:12,028 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:12,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1140482722, now seen corresponding path program 45 times [2021-06-12 20:48:12,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:12,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001883515] [2021-06-12 20:48:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:12,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:12,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001883515] [2021-06-12 20:48:12,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001883515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:12,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005558086] [2021-06-12 20:48:12,261 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 20:48:12,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:48:12,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:12,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:12,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:12,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:12,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:12,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:12,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:12,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:12,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:12,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:12,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:12,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005558086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:12,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:12,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 20:48:12,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155918936] [2021-06-12 20:48:12,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:12,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:12,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:12,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:12,667 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:12,847 INFO L93 Difference]: Finished difference Result 1116 states and 2233 transitions. [2021-06-12 20:48:12,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-12 20:48:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:12,849 INFO L225 Difference]: With dead ends: 1116 [2021-06-12 20:48:12,849 INFO L226 Difference]: Without dead ends: 1094 [2021-06-12 20:48:12,850 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 470.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:12,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-06-12 20:48:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 774. [2021-06-12 20:48:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-12 20:48:12,861 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-12 20:48:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:12,862 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-12 20:48:12,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-12 20:48:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:12,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:12,863 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:13,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:13,077 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1597877782, now seen corresponding path program 46 times [2021-06-12 20:48:13,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:13,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715326012] [2021-06-12 20:48:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:13,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:13,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715326012] [2021-06-12 20:48:13,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715326012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:13,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916338455] [2021-06-12 20:48:13,286 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 20:48:13,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:13,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:13,310 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:13,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:13,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:13,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:13,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:13,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:13,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:13,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:13,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:13,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:13,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:13,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:13,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:13,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:13,625 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:13,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916338455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:13,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:13,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 20:48:13,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806675462] [2021-06-12 20:48:13,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:13,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:13,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:13,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:13,635 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:14,003 INFO L93 Difference]: Finished difference Result 1127 states and 2256 transitions. [2021-06-12 20:48:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 31 [2021-06-12 20:48:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:14,004 INFO L225 Difference]: With dead ends: 1127 [2021-06-12 20:48:14,004 INFO L226 Difference]: Without dead ends: 1104 [2021-06-12 20:48:14,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-06-12 20:48:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 774. [2021-06-12 20:48:14,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:14,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-06-12 20:48:14,014 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-06-12 20:48:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:14,014 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-06-12 20:48:14,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 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 20:48:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-06-12 20:48:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:14,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:14,015 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:14,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:14,220 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash 102354416, now seen corresponding path program 47 times [2021-06-12 20:48:14,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:14,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236313122] [2021-06-12 20:48:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:14,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236313122] [2021-06-12 20:48:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236313122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:14,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53784930] [2021-06-12 20:48:14,424 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 20:48:14,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:48:14,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:14,450 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:14,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:14,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:14,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:14,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:14,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:14,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:14,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:14,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:14,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53784930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:14,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:14,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-12 20:48:14,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920766456] [2021-06-12 20:48:14,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:14,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:14,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:14,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:14,720 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:14,896 INFO L93 Difference]: Finished difference Result 1217 states and 2444 transitions. [2021-06-12 20:48:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:14,897 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:48:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:14,898 INFO L225 Difference]: With dead ends: 1217 [2021-06-12 20:48:14,898 INFO L226 Difference]: Without dead ends: 1113 [2021-06-12 20:48:14,898 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-12 20:48:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 801. [2021-06-12 20:48:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.98125) internal successors, (1585), 800 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:14,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1585 transitions. [2021-06-12 20:48:14,911 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1585 transitions. Word has length 31 [2021-06-12 20:48:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:14,911 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 1585 transitions. [2021-06-12 20:48:14,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1585 transitions. [2021-06-12 20:48:14,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:14,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:14,913 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:15,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 20:48:15,136 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:15,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:15,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1046021464, now seen corresponding path program 48 times [2021-06-12 20:48:15,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:15,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647046453] [2021-06-12 20:48:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:15,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:15,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647046453] [2021-06-12 20:48:15,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647046453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:15,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147578055] [2021-06-12 20:48:15,347 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 20:48:15,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:48:15,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:15,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:15,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:15,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:15,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:15,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:15,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:15,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:15,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:15,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:15,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:15,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:15,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:15,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:15,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:15,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147578055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:15,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:15,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-06-12 20:48:15,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768764798] [2021-06-12 20:48:15,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:15,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:15,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:15,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:15,722 INFO L87 Difference]: Start difference. First operand 801 states and 1585 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:16,085 INFO L93 Difference]: Finished difference Result 1401 states and 2833 transitions. [2021-06-12 20:48:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:16,086 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:48:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:16,088 INFO L225 Difference]: With dead ends: 1401 [2021-06-12 20:48:16,088 INFO L226 Difference]: Without dead ends: 1344 [2021-06-12 20:48:16,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:16,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-06-12 20:48:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 795. [2021-06-12 20:48:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.978589420654912) internal successors, (1571), 794 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1571 transitions. [2021-06-12 20:48:16,104 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1571 transitions. Word has length 31 [2021-06-12 20:48:16,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:16,104 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1571 transitions. [2021-06-12 20:48:16,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1571 transitions. [2021-06-12 20:48:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:16,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:16,105 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:16,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:16,329 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:16,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:16,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2129516810, now seen corresponding path program 49 times [2021-06-12 20:48:16,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:16,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425780877] [2021-06-12 20:48:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:16,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:16,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425780877] [2021-06-12 20:48:16,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425780877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:16,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008786528] [2021-06-12 20:48:16,562 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 20:48:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:16,597 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:16,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:16,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:16,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:16,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:16,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:16,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:16,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:16,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:16,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008786528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:16,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:16,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 20:48:16,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345649457] [2021-06-12 20:48:16,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:16,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:16,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:16,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:16,941 INFO L87 Difference]: Start difference. First operand 795 states and 1571 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:17,250 INFO L93 Difference]: Finished difference Result 1359 states and 2744 transitions. [2021-06-12 20:48:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:17,251 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:48:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:17,253 INFO L225 Difference]: With dead ends: 1359 [2021-06-12 20:48:17,253 INFO L226 Difference]: Without dead ends: 1304 [2021-06-12 20:48:17,253 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:17,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-06-12 20:48:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 783. [2021-06-12 20:48:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:17,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-06-12 20:48:17,265 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-06-12 20:48:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:17,265 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-06-12 20:48:17,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-06-12 20:48:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:17,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:17,266 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:17,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-12 20:48:17,481 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:17,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:17,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1656657460, now seen corresponding path program 50 times [2021-06-12 20:48:17,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:17,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760526937] [2021-06-12 20:48:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:17,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:17,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:17,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760526937] [2021-06-12 20:48:17,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760526937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:17,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43899824] [2021-06-12 20:48:17,717 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 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 20:48:17,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:17,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:17,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:17,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:18,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:18,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:18,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:18,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:18,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:18,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:18,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:18,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:18,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:18,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:18,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:18,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43899824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:18,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:18,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 20:48:18,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175914800] [2021-06-12 20:48:18,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:18,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:18,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:18,070 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:18,366 INFO L93 Difference]: Finished difference Result 1153 states and 2311 transitions. [2021-06-12 20:48:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:18,367 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:48:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:18,369 INFO L225 Difference]: With dead ends: 1153 [2021-06-12 20:48:18,369 INFO L226 Difference]: Without dead ends: 1131 [2021-06-12 20:48:18,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 428.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:18,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-06-12 20:48:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 783. [2021-06-12 20:48:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-06-12 20:48:18,380 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-06-12 20:48:18,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:18,380 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-06-12 20:48:18,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-06-12 20:48:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:18,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:18,382 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:18,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-12 20:48:18,597 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash 100050668, now seen corresponding path program 51 times [2021-06-12 20:48:18,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:18,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045268560] [2021-06-12 20:48:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:18,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:18,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045268560] [2021-06-12 20:48:18,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045268560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:18,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740895446] [2021-06-12 20:48:18,802 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 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 20:48:18,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:48:18,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:18,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:18,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:19,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:19,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:19,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:19,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:19,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:19,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:19,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:19,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:19,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740895446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:19,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:19,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 20:48:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336196877] [2021-06-12 20:48:19,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:19,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:19,146 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:19,350 INFO L93 Difference]: Finished difference Result 1136 states and 2278 transitions. [2021-06-12 20:48:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 20:48:19,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-12 20:48:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:19,351 INFO L225 Difference]: With dead ends: 1136 [2021-06-12 20:48:19,351 INFO L226 Difference]: Without dead ends: 1113 [2021-06-12 20:48:19,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-12 20:48:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 777. [2021-06-12 20:48:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.9755154639175259) internal successors, (1533), 776 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1533 transitions. [2021-06-12 20:48:19,364 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1533 transitions. Word has length 31 [2021-06-12 20:48:19,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:19,364 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 1533 transitions. [2021-06-12 20:48:19,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1533 transitions. [2021-06-12 20:48:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-12 20:48:19,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:19,365 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:19,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 20:48:19,581 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash 948748694, now seen corresponding path program 52 times [2021-06-12 20:48:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:19,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353534089] [2021-06-12 20:48:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:19,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:19,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353534089] [2021-06-12 20:48:19,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353534089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:19,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776487125] [2021-06-12 20:48:19,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:48:19,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:19,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:19,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:20,090 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-06-12 20:48:20,091 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 72 treesize of output 32 [2021-06-12 20:48:20,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:20,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:20,098 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 20:48:20,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:12 [2021-06-12 20:48:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:20,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776487125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:20,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:20,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-12 20:48:20,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683353105] [2021-06-12 20:48:20,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 20:48:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 20:48:20,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:20,112 INFO L87 Difference]: Start difference. First operand 777 states and 1533 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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 20:48:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:20,388 INFO L93 Difference]: Finished difference Result 1012 states and 2014 transitions. [2021-06-12 20:48:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 20:48:20,388 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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 31 [2021-06-12 20:48:20,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:20,389 INFO L225 Difference]: With dead ends: 1012 [2021-06-12 20:48:20,389 INFO L226 Difference]: Without dead ends: 997 [2021-06-12 20:48:20,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 394.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-12 20:48:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-12 20:48:20,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2021-06-12 20:48:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.9770114942528736) internal successors, (1548), 783 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:20,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1548 transitions. [2021-06-12 20:48:20,397 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1548 transitions. Word has length 31 [2021-06-12 20:48:20,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:20,397 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1548 transitions. [2021-06-12 20:48:20,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 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 20:48:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1548 transitions. [2021-06-12 20:48:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-12 20:48:20,399 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:20,399 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:20,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-12 20:48:20,613 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:20,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1698443767, now seen corresponding path program 53 times [2021-06-12 20:48:20,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:20,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280392943] [2021-06-12 20:48:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:20,646 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:20,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:20,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280392943] [2021-06-12 20:48:20,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280392943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:20,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547515238] [2021-06-12 20:48:20,647 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 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 20:48:20,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:48:20,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:20,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 20:48:20,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:20,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547515238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:20,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:20,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 20:48:20,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352578712] [2021-06-12 20:48:20,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 20:48:20,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:20,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 20:48:20,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:48:20,753 INFO L87 Difference]: Start difference. First operand 784 states and 1548 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 20:48:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:20,778 INFO L93 Difference]: Finished difference Result 1073 states and 2126 transitions. [2021-06-12 20:48:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 20:48:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 33 [2021-06-12 20:48:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:20,780 INFO L225 Difference]: With dead ends: 1073 [2021-06-12 20:48:20,780 INFO L226 Difference]: Without dead ends: 1064 [2021-06-12 20:48:20,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-12 20:48:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-06-12 20:48:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 845. [2021-06-12 20:48:20,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.9940758293838863) internal successors, (1683), 844 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1683 transitions. [2021-06-12 20:48:20,790 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1683 transitions. Word has length 33 [2021-06-12 20:48:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:20,790 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1683 transitions. [2021-06-12 20:48:20,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 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 20:48:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1683 transitions. [2021-06-12 20:48:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 20:48:20,792 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:20,792 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:21,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:21,013 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash 602846472, now seen corresponding path program 54 times [2021-06-12 20:48:21,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:21,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575075095] [2021-06-12 20:48:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:48:21,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:21,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575075095] [2021-06-12 20:48:21,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575075095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:21,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135802933] [2021-06-12 20:48:21,234 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 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 20:48:21,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 20:48:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:21,268 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:21,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:21,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:21,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:21,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:21,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:21,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:21,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:21,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:21,634 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:21,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:21,635 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:48:21,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135802933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:21,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:21,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 20:48:21,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923121065] [2021-06-12 20:48:21,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:21,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:21,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:21,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:21,646 INFO L87 Difference]: Start difference. First operand 845 states and 1683 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:22,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:22,111 INFO L93 Difference]: Finished difference Result 1429 states and 2876 transitions. [2021-06-12 20:48:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:48:22,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-12 20:48:22,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:22,113 INFO L225 Difference]: With dead ends: 1429 [2021-06-12 20:48:22,113 INFO L226 Difference]: Without dead ends: 1414 [2021-06-12 20:48:22,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 588.1ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:48:22,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-06-12 20:48:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 869. [2021-06-12 20:48:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.9907834101382489) internal successors, (1728), 868 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1728 transitions. [2021-06-12 20:48:22,122 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1728 transitions. Word has length 34 [2021-06-12 20:48:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:22,122 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 1728 transitions. [2021-06-12 20:48:22,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1728 transitions. [2021-06-12 20:48:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 20:48:22,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:22,123 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:22,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 20:48:22,323 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:22,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:22,323 INFO L82 PathProgramCache]: Analyzing trace with hash 867153280, now seen corresponding path program 55 times [2021-06-12 20:48:22,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:22,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910065203] [2021-06-12 20:48:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:48:22,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:22,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910065203] [2021-06-12 20:48:22,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910065203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:22,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696568372] [2021-06-12 20:48:22,571 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 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 20:48:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:22,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:22,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:22,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:22,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:22,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:22,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:22,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:22,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:22,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:22,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:22,974 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:22,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:22,983 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:48:22,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696568372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:22,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:22,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-12 20:48:22,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925960060] [2021-06-12 20:48:22,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 20:48:22,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:22,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 20:48:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-12 20:48:22,984 INFO L87 Difference]: Start difference. First operand 869 states and 1728 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 20:48:23,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:23,372 INFO L93 Difference]: Finished difference Result 1640 states and 3316 transitions. [2021-06-12 20:48:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:48:23,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 34 [2021-06-12 20:48:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:23,374 INFO L225 Difference]: With dead ends: 1640 [2021-06-12 20:48:23,374 INFO L226 Difference]: Without dead ends: 1595 [2021-06-12 20:48:23,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:48:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-06-12 20:48:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 926. [2021-06-12 20:48:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9848648648648648) internal successors, (1836), 925 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1836 transitions. [2021-06-12 20:48:23,385 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1836 transitions. Word has length 34 [2021-06-12 20:48:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:23,385 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1836 transitions. [2021-06-12 20:48:23,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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 20:48:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1836 transitions. [2021-06-12 20:48:23,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 20:48:23,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:23,387 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:23,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:23,610 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1679153002, now seen corresponding path program 56 times [2021-06-12 20:48:23,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:23,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084567939] [2021-06-12 20:48:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:48:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084567939] [2021-06-12 20:48:23,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084567939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:23,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279508062] [2021-06-12 20:48:23,824 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 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 20:48:23,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:23,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:23,890 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 20:48:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:24,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:24,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:24,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:24,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-06-12 20:48:24,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:24,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:24,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:24,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-06-12 20:48:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:48:24,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279508062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:24,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:24,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-12 20:48:24,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854883136] [2021-06-12 20:48:24,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 20:48:24,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 20:48:24,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 20:48:24,259 INFO L87 Difference]: Start difference. First operand 926 states and 1836 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 20:48:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:24,665 INFO L93 Difference]: Finished difference Result 1557 states and 3145 transitions. [2021-06-12 20:48:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:48:24,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 34 [2021-06-12 20:48:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:24,666 INFO L225 Difference]: With dead ends: 1557 [2021-06-12 20:48:24,666 INFO L226 Difference]: Without dead ends: 1512 [2021-06-12 20:48:24,666 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 579.3ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:48:24,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-06-12 20:48:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 896. [2021-06-12 20:48:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.987709497206704) internal successors, (1779), 895 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1779 transitions. [2021-06-12 20:48:24,681 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1779 transitions. Word has length 34 [2021-06-12 20:48:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:24,681 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1779 transitions. [2021-06-12 20:48:24,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 20:48:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1779 transitions. [2021-06-12 20:48:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:24,682 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:24,682 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:24,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-12 20:48:24,883 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:24,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:24,883 INFO L82 PathProgramCache]: Analyzing trace with hash 431279499, now seen corresponding path program 57 times [2021-06-12 20:48:24,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:24,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862747303] [2021-06-12 20:48:24,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:25,169 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:48:25,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862747303] [2021-06-12 20:48:25,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862747303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:25,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523014744] [2021-06-12 20:48:25,170 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 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 20:48:25,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:48:25,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:25,202 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:25,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:25,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:25,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:25,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:25,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:25,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:25,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:25,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:25,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:25,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:25,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:25,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523014744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:25,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:25,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-12 20:48:25,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310909391] [2021-06-12 20:48:25,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:48:25,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:25,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:48:25,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:25,814 INFO L87 Difference]: Start difference. First operand 896 states and 1779 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:26,212 INFO L93 Difference]: Finished difference Result 1846 states and 3731 transitions. [2021-06-12 20:48:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 20:48:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:26,214 INFO L225 Difference]: With dead ends: 1846 [2021-06-12 20:48:26,214 INFO L226 Difference]: Without dead ends: 1801 [2021-06-12 20:48:26,214 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 801.9ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:48:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-06-12 20:48:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 926. [2021-06-12 20:48:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9891891891891893) internal successors, (1840), 925 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1840 transitions. [2021-06-12 20:48:26,228 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1840 transitions. Word has length 36 [2021-06-12 20:48:26,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:26,228 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1840 transitions. [2021-06-12 20:48:26,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1840 transitions. [2021-06-12 20:48:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:26,230 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:26,230 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:26,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:26,445 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:26,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:26,445 INFO L82 PathProgramCache]: Analyzing trace with hash 971114529, now seen corresponding path program 58 times [2021-06-12 20:48:26,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:26,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396112943] [2021-06-12 20:48:26,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:48:26,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:26,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396112943] [2021-06-12 20:48:26,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396112943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:26,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717329587] [2021-06-12 20:48:26,725 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:26,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:26,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:26,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:26,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:27,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:27,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:27,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:27,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:27,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:27,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:27,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:27,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:27,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:27,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:27,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717329587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:27,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:27,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-12 20:48:27,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461336404] [2021-06-12 20:48:27,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:48:27,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:48:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:27,282 INFO L87 Difference]: Start difference. First operand 926 states and 1840 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:27,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:27,668 INFO L93 Difference]: Finished difference Result 2095 states and 4241 transitions. [2021-06-12 20:48:27,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:48:27,669 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:27,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:27,671 INFO L225 Difference]: With dead ends: 2095 [2021-06-12 20:48:27,671 INFO L226 Difference]: Without dead ends: 2049 [2021-06-12 20:48:27,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 727.4ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:48:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-06-12 20:48:27,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1030. [2021-06-12 20:48:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.0136054421768708) internal successors, (2072), 1029 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:27,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2072 transitions. [2021-06-12 20:48:27,682 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2072 transitions. Word has length 36 [2021-06-12 20:48:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:27,683 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2072 transitions. [2021-06-12 20:48:27,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:27,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2072 transitions. [2021-06-12 20:48:27,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:27,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:27,684 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:27,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 20:48:27,885 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:27,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1302699637, now seen corresponding path program 59 times [2021-06-12 20:48:27,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:27,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777810642] [2021-06-12 20:48:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:48:28,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:28,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777810642] [2021-06-12 20:48:28,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777810642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:28,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028315422] [2021-06-12 20:48:28,194 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 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 20:48:28,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:48:28,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:28,230 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:48:28,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:28,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:28,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:28,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:28,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:28,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:28,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:28,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:28,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:28,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:28,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:28,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028315422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:28,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:28,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-12 20:48:28,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817132024] [2021-06-12 20:48:28,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:48:28,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:28,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:48:28,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:28,776 INFO L87 Difference]: Start difference. First operand 1030 states and 2072 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:29,253 INFO L93 Difference]: Finished difference Result 1598 states and 3240 transitions. [2021-06-12 20:48:29,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:48:29,253 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:29,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:29,255 INFO L225 Difference]: With dead ends: 1598 [2021-06-12 20:48:29,255 INFO L226 Difference]: Without dead ends: 1576 [2021-06-12 20:48:29,255 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:48:29,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-06-12 20:48:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1036. [2021-06-12 20:48:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.0144927536231885) internal successors, (2085), 1035 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2085 transitions. [2021-06-12 20:48:29,265 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2085 transitions. Word has length 36 [2021-06-12 20:48:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:29,265 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2085 transitions. [2021-06-12 20:48:29,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2085 transitions. [2021-06-12 20:48:29,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:29,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:29,266 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:29,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:29,467 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:29,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:29,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1027051523, now seen corresponding path program 60 times [2021-06-12 20:48:29,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:29,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398854362] [2021-06-12 20:48:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:29,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:29,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398854362] [2021-06-12 20:48:29,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398854362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:29,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98573509] [2021-06-12 20:48:29,787 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 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 20:48:29,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 20:48:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:29,825 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:29,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:30,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:30,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:30,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:30,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:30,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:30,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:30,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:30,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:30,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98573509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:30,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:30,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-12 20:48:30,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770383490] [2021-06-12 20:48:30,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 20:48:30,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:30,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 20:48:30,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:48:30,407 INFO L87 Difference]: Start difference. First operand 1036 states and 2085 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:30,806 INFO L93 Difference]: Finished difference Result 2409 states and 4930 transitions. [2021-06-12 20:48:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:48:30,807 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:30,809 INFO L225 Difference]: With dead ends: 2409 [2021-06-12 20:48:30,809 INFO L226 Difference]: Without dead ends: 2332 [2021-06-12 20:48:30,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 819.2ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:48:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-06-12 20:48:30,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1084. [2021-06-12 20:48:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.0083102493074794) internal successors, (2175), 1083 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2175 transitions. [2021-06-12 20:48:30,822 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2175 transitions. Word has length 36 [2021-06-12 20:48:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:30,822 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 2175 transitions. [2021-06-12 20:48:30,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2175 transitions. [2021-06-12 20:48:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:30,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:30,823 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:31,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-12 20:48:31,024 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:31,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1566886553, now seen corresponding path program 61 times [2021-06-12 20:48:31,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:31,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717787305] [2021-06-12 20:48:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:31,363 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:31,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:31,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717787305] [2021-06-12 20:48:31,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717787305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:31,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647132999] [2021-06-12 20:48:31,364 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 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 20:48:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:31,395 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:31,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:31,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:31,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:31,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:31,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:31,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:31,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:31,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:31,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:31,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647132999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:31,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:31,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-12 20:48:31,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560684284] [2021-06-12 20:48:31,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 20:48:31,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 20:48:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:48:31,909 INFO L87 Difference]: Start difference. First operand 1084 states and 2175 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:32,625 INFO L93 Difference]: Finished difference Result 2544 states and 5180 transitions. [2021-06-12 20:48:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:48:32,625 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:32,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:32,627 INFO L225 Difference]: With dead ends: 2544 [2021-06-12 20:48:32,628 INFO L226 Difference]: Without dead ends: 2466 [2021-06-12 20:48:32,628 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 815.9ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 20:48:32,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-12 20:48:32,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1207. [2021-06-12 20:48:32,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-06-12 20:48:32,648 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-06-12 20:48:32,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:32,648 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-06-12 20:48:32,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:32,648 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-06-12 20:48:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:32,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:32,650 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:32,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:32,873 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:32,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:32,873 INFO L82 PathProgramCache]: Analyzing trace with hash -706927613, now seen corresponding path program 62 times [2021-06-12 20:48:32,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:32,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046862124] [2021-06-12 20:48:32,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:33,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046862124] [2021-06-12 20:48:33,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046862124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:33,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674443911] [2021-06-12 20:48:33,199 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 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 20:48:33,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:33,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:33,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:33,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:33,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:33,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:33,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:33,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:33,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:33,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:33,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:33,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:33,810 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:33,841 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:33,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674443911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:33,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:33,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-12 20:48:33,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133763234] [2021-06-12 20:48:33,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 20:48:33,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 20:48:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:48:33,842 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:34,468 INFO L93 Difference]: Finished difference Result 2101 states and 4239 transitions. [2021-06-12 20:48:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:48:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:34,470 INFO L225 Difference]: With dead ends: 2101 [2021-06-12 20:48:34,470 INFO L226 Difference]: Without dead ends: 2073 [2021-06-12 20:48:34,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:48:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-06-12 20:48:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1207. [2021-06-12 20:48:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-06-12 20:48:34,483 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-06-12 20:48:34,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:34,483 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-06-12 20:48:34,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:34,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-06-12 20:48:34,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:34,484 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:34,484 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:34,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 20:48:34,685 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash 623181831, now seen corresponding path program 63 times [2021-06-12 20:48:34,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:34,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535430009] [2021-06-12 20:48:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:48:34,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:34,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535430009] [2021-06-12 20:48:34,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535430009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:34,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098582929] [2021-06-12 20:48:34,947 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 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 20:48:34,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:48:34,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:34,997 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:34,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:35,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:35,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:35,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:35,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:35,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:35,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:35,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098582929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:35,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:35,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-06-12 20:48:35,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745044638] [2021-06-12 20:48:35,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:48:35,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:35,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:48:35,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:48:35,478 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:35,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:35,863 INFO L93 Difference]: Finished difference Result 2018 states and 4044 transitions. [2021-06-12 20:48:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:48:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:35,865 INFO L225 Difference]: With dead ends: 2018 [2021-06-12 20:48:35,866 INFO L226 Difference]: Without dead ends: 1879 [2021-06-12 20:48:35,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 735.0ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:48:35,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-06-12 20:48:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1350. [2021-06-12 20:48:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.9940696812453669) internal successors, (2690), 1349 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2690 transitions. [2021-06-12 20:48:35,884 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2690 transitions. Word has length 36 [2021-06-12 20:48:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:35,884 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 2690 transitions. [2021-06-12 20:48:35,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:35,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2690 transitions. [2021-06-12 20:48:35,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:35,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:35,886 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:36,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 20:48:36,109 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:36,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:36,110 INFO L82 PathProgramCache]: Analyzing trace with hash 603825257, now seen corresponding path program 64 times [2021-06-12 20:48:36,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:36,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021534574] [2021-06-12 20:48:36,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:36,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:36,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021534574] [2021-06-12 20:48:36,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021534574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:36,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986947827] [2021-06-12 20:48:36,377 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 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 20:48:36,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:36,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:36,403 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:36,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:36,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:36,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:36,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:36,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:36,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:36,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:36,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:36,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:36,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:36,904 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:36,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986947827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:36,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:36,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-12 20:48:36,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113256382] [2021-06-12 20:48:36,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:48:36,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:36,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:48:36,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:36,905 INFO L87 Difference]: Start difference. First operand 1350 states and 2690 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:37,353 INFO L93 Difference]: Finished difference Result 2339 states and 4747 transitions. [2021-06-12 20:48:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:48:37,353 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:37,355 INFO L225 Difference]: With dead ends: 2339 [2021-06-12 20:48:37,355 INFO L226 Difference]: Without dead ends: 2297 [2021-06-12 20:48:37,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 729.7ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:48:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-06-12 20:48:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1365. [2021-06-12 20:48:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-06-12 20:48:37,378 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-06-12 20:48:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:37,378 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-06-12 20:48:37,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-06-12 20:48:37,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:37,380 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:37,380 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:37,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 20:48:37,581 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:37,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1455840993, now seen corresponding path program 65 times [2021-06-12 20:48:37,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:37,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212405585] [2021-06-12 20:48:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:37,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:37,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212405585] [2021-06-12 20:48:37,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212405585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:37,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415235694] [2021-06-12 20:48:37,860 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 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 20:48:37,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:48:37,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:37,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:38,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:38,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:38,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:38,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:38,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:38,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-12 20:48:38,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:38,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:38,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:38,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-12 20:48:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:38,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415235694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:38,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:38,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-06-12 20:48:38,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806387923] [2021-06-12 20:48:38,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 20:48:38,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:38,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 20:48:38,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:48:38,512 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:39,157 INFO L93 Difference]: Finished difference Result 2510 states and 5065 transitions. [2021-06-12 20:48:39,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:48:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:39,159 INFO L225 Difference]: With dead ends: 2510 [2021-06-12 20:48:39,159 INFO L226 Difference]: Without dead ends: 2465 [2021-06-12 20:48:39,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 856.9ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:48:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-12 20:48:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1365. [2021-06-12 20:48:39,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-06-12 20:48:39,175 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-06-12 20:48:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:39,175 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-06-12 20:48:39,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:39,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-06-12 20:48:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:39,176 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:39,176 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:39,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:39,377 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:39,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash -817973173, now seen corresponding path program 66 times [2021-06-12 20:48:39,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:39,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004700116] [2021-06-12 20:48:39,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:39,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:39,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004700116] [2021-06-12 20:48:39,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004700116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:39,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264862332] [2021-06-12 20:48:39,691 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 20:48:39,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:48:39,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:39,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:39,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:40,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:40,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:40,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:40,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:40,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 37 [2021-06-12 20:48:40,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:40,789 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-12 20:48:40,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:40,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-06-12 20:48:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:40,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264862332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:40,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:40,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-12 20:48:40,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358406182] [2021-06-12 20:48:40,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 20:48:40,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:40,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 20:48:40,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:48:40,836 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:46,521 INFO L93 Difference]: Finished difference Result 2490 states and 5033 transitions. [2021-06-12 20:48:46,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:48:46,521 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:46,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:46,524 INFO L225 Difference]: With dead ends: 2490 [2021-06-12 20:48:46,524 INFO L226 Difference]: Without dead ends: 2398 [2021-06-12 20:48:46,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2630.5ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:48:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-06-12 20:48:46,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1439. [2021-06-12 20:48:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.0180806675938805) internal successors, (2902), 1438 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2902 transitions. [2021-06-12 20:48:46,540 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2902 transitions. Word has length 36 [2021-06-12 20:48:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:46,540 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 2902 transitions. [2021-06-12 20:48:46,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2902 transitions. [2021-06-12 20:48:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:46,542 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:46,542 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:46,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:46,742 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:46,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:46,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1925362883, now seen corresponding path program 67 times [2021-06-12 20:48:46,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:46,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028353701] [2021-06-12 20:48:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:47,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:47,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028353701] [2021-06-12 20:48:47,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028353701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:47,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710110868] [2021-06-12 20:48:47,092 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 20:48:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:47,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:47,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:47,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:47,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:47,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:47,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:47,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:47,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:47,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:47,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:47,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:47,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710110868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:47,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:47,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-12 20:48:47,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698870467] [2021-06-12 20:48:47,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 20:48:47,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 20:48:47,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:48:47,782 INFO L87 Difference]: Start difference. First operand 1439 states and 2902 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:48,287 INFO L93 Difference]: Finished difference Result 2160 states and 4385 transitions. [2021-06-12 20:48:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:48:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:48,289 INFO L225 Difference]: With dead ends: 2160 [2021-06-12 20:48:48,289 INFO L226 Difference]: Without dead ends: 2137 [2021-06-12 20:48:48,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 858.6ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:48:48,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-06-12 20:48:48,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1445. [2021-06-12 20:48:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.018698060941828) internal successors, (2915), 1444 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2915 transitions. [2021-06-12 20:48:48,304 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2915 transitions. Word has length 36 [2021-06-12 20:48:48,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:48,304 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 2915 transitions. [2021-06-12 20:48:48,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2915 transitions. [2021-06-12 20:48:48,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:48,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:48,306 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:48,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:48,507 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:48,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:48,507 INFO L82 PathProgramCache]: Analyzing trace with hash -325263507, now seen corresponding path program 68 times [2021-06-12 20:48:48,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:48,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339670914] [2021-06-12 20:48:48,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:48:48,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:48,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339670914] [2021-06-12 20:48:48,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339670914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:48,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271258066] [2021-06-12 20:48:48,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:48:48,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:48,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:49,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:49,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:49,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:49,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:49,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:49,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:49,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:49,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:49,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:49,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271258066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:49,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:49,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-12 20:48:49,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217993259] [2021-06-12 20:48:49,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:48:49,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:48:49,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:48:49,245 INFO L87 Difference]: Start difference. First operand 1445 states and 2915 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:49,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:49,779 INFO L93 Difference]: Finished difference Result 2272 states and 4614 transitions. [2021-06-12 20:48:49,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:48:49,780 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:49,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:49,781 INFO L225 Difference]: With dead ends: 2272 [2021-06-12 20:48:49,781 INFO L226 Difference]: Without dead ends: 2213 [2021-06-12 20:48:49,782 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:48:49,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-06-12 20:48:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1517. [2021-06-12 20:48:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.0118733509234827) internal successors, (3050), 1516 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 3050 transitions. [2021-06-12 20:48:49,796 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 3050 transitions. Word has length 36 [2021-06-12 20:48:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:49,796 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 3050 transitions. [2021-06-12 20:48:49,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:49,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 3050 transitions. [2021-06-12 20:48:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:49,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:49,798 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:49,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-12 20:48:49,998 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash 214571523, now seen corresponding path program 69 times [2021-06-12 20:48:49,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:49,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846622078] [2021-06-12 20:48:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:50,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846622078] [2021-06-12 20:48:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846622078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22828934] [2021-06-12 20:48:50,233 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 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 20:48:50,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:48:50,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:50,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:50,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:50,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:50,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:50,755 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:50,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:50,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:50,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:50,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22828934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:50,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:50,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:48:50,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625870217] [2021-06-12 20:48:50,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:48:50,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:50,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:48:50,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:48:50,772 INFO L87 Difference]: Start difference. First operand 1517 states and 3050 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:51,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:51,300 INFO L93 Difference]: Finished difference Result 2702 states and 5500 transitions. [2021-06-12 20:48:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:48:51,300 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:51,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:51,303 INFO L225 Difference]: With dead ends: 2702 [2021-06-12 20:48:51,303 INFO L226 Difference]: Without dead ends: 2605 [2021-06-12 20:48:51,303 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:48:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-12 20:48:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1571. [2021-06-12 20:48:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-06-12 20:48:51,319 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-06-12 20:48:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:51,319 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-06-12 20:48:51,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-06-12 20:48:51,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:51,321 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:51,321 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:51,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:51,525 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:51,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:51,525 INFO L82 PathProgramCache]: Analyzing trace with hash -2059242643, now seen corresponding path program 70 times [2021-06-12 20:48:51,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:51,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116284403] [2021-06-12 20:48:51,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:51,770 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:51,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116284403] [2021-06-12 20:48:51,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116284403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:51,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768947282] [2021-06-12 20:48:51,771 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 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 20:48:51,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:48:51,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:51,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:51,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:52,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:52,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:52,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:52,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:52,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:52,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:52,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:52,283 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:52,291 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:52,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768947282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:52,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:52,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:48:52,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206247916] [2021-06-12 20:48:52,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:48:52,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:52,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:48:52,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:48:52,292 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:52,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:52,638 INFO L93 Difference]: Finished difference Result 2210 states and 4470 transitions. [2021-06-12 20:48:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:48:52,639 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:52,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:52,641 INFO L225 Difference]: With dead ends: 2210 [2021-06-12 20:48:52,641 INFO L226 Difference]: Without dead ends: 2188 [2021-06-12 20:48:52,641 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 589.0ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:48:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-06-12 20:48:52,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1571. [2021-06-12 20:48:52,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-06-12 20:48:52,658 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-06-12 20:48:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:52,658 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-06-12 20:48:52,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-06-12 20:48:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:52,659 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:52,659 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:52,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:52,861 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash -729133199, now seen corresponding path program 71 times [2021-06-12 20:48:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:52,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003546307] [2021-06-12 20:48:52,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:48:53,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:53,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003546307] [2021-06-12 20:48:53,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003546307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:53,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813980971] [2021-06-12 20:48:53,134 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 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 20:48:53,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:48:53,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:53,161 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:48:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:53,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:53,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:53,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:53,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:53,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:53,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:53,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:53,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:53,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:53,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813980971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:53,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:53,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-12 20:48:53,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113592041] [2021-06-12 20:48:53,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:48:53,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:53,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:48:53,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:48:53,649 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:54,149 INFO L93 Difference]: Finished difference Result 2485 states and 5026 transitions. [2021-06-12 20:48:54,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:48:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:54,152 INFO L225 Difference]: With dead ends: 2485 [2021-06-12 20:48:54,152 INFO L226 Difference]: Without dead ends: 2254 [2021-06-12 20:48:54,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-12 20:48:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1582. [2021-06-12 20:48:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.001897533206831) internal successors, (3165), 1581 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3165 transitions. [2021-06-12 20:48:54,170 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3165 transitions. Word has length 36 [2021-06-12 20:48:54,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:54,170 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3165 transitions. [2021-06-12 20:48:54,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3165 transitions. [2021-06-12 20:48:54,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:54,171 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:54,171 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:54,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:54,372 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:54,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash 103525963, now seen corresponding path program 72 times [2021-06-12 20:48:54,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:54,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735950759] [2021-06-12 20:48:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:54,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:54,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735950759] [2021-06-12 20:48:54,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735950759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:54,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834427301] [2021-06-12 20:48:54,685 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 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 20:48:54,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:48:54,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:54,720 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:54,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:55,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:55,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:55,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:55,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:55,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:55,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:55,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:55,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:55,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:55,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834427301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:55,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:55,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:48:55,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006859132] [2021-06-12 20:48:55,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:48:55,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:48:55,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:55,243 INFO L87 Difference]: Start difference. First operand 1582 states and 3165 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:55,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:55,604 INFO L93 Difference]: Finished difference Result 2739 states and 5530 transitions. [2021-06-12 20:48:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:48:55,604 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:55,606 INFO L225 Difference]: With dead ends: 2739 [2021-06-12 20:48:55,606 INFO L226 Difference]: Without dead ends: 2676 [2021-06-12 20:48:55,606 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 695.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-12 20:48:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1621. [2021-06-12 20:48:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.0) internal successors, (3240), 1620 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 20:48:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3240 transitions. [2021-06-12 20:48:55,628 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3240 transitions. Word has length 36 [2021-06-12 20:48:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:55,628 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3240 transitions. [2021-06-12 20:48:55,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3240 transitions. [2021-06-12 20:48:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:55,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:55,630 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:55,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 20:48:55,830 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2124679093, now seen corresponding path program 73 times [2021-06-12 20:48:55,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:55,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43918682] [2021-06-12 20:48:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:56,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:56,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43918682] [2021-06-12 20:48:56,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43918682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:56,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743441581] [2021-06-12 20:48:56,074 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 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 20:48:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:56,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:56,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:56,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:56,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:56,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:56,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:56,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:56,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:56,621 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:56,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743441581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:56,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:56,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:48:56,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808014646] [2021-06-12 20:48:56,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:48:56,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:56,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:48:56,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:56,622 INFO L87 Difference]: Start difference. First operand 1621 states and 3240 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:57,269 INFO L93 Difference]: Finished difference Result 2343 states and 4717 transitions. [2021-06-12 20:48:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:48:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:57,272 INFO L225 Difference]: With dead ends: 2343 [2021-06-12 20:48:57,272 INFO L226 Difference]: Without dead ends: 2321 [2021-06-12 20:48:57,272 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 610.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:57,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-06-12 20:48:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1627. [2021-06-12 20:48:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-06-12 20:48:57,287 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-06-12 20:48:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:57,287 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-06-12 20:48:57,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-06-12 20:48:57,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:57,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:57,289 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:57,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:48:57,489 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:57,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:57,490 INFO L82 PathProgramCache]: Analyzing trace with hash 573047853, now seen corresponding path program 74 times [2021-06-12 20:48:57,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:57,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259925618] [2021-06-12 20:48:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:57,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259925618] [2021-06-12 20:48:57,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259925618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776602704] [2021-06-12 20:48:57,746 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 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 20:48:57,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:48:57,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:57,773 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 20:48:57,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:58,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:58,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:58,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:58,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:58,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:58,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-06-12 20:48:58,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:58,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:58,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:58,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-12 20:48:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:58,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776602704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:58,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:58,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:48:58,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570043049] [2021-06-12 20:48:58,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:48:58,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:58,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:48:58,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:58,299 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:48:58,698 INFO L93 Difference]: Finished difference Result 2287 states and 4610 transitions. [2021-06-12 20:48:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:48:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:48:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:48:58,700 INFO L225 Difference]: With dead ends: 2287 [2021-06-12 20:48:58,700 INFO L226 Difference]: Without dead ends: 2264 [2021-06-12 20:48:58,700 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:48:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-12 20:48:58,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1627. [2021-06-12 20:48:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-06-12 20:48:58,717 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-06-12 20:48:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:48:58,717 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-06-12 20:48:58,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:48:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-06-12 20:48:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:48:58,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:48:58,718 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:48:58,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 20:48:58,919 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:48:58,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:48:58,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1638712185, now seen corresponding path program 75 times [2021-06-12 20:48:58,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:48:58,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364563418] [2021-06-12 20:48:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:48:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:48:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:48:59,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:48:59,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364563418] [2021-06-12 20:48:59,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364563418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:59,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771118041] [2021-06-12 20:48:59,172 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 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 20:48:59,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:48:59,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:48:59,201 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:48:59,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:48:59,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:59,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:59,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:48:59,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:48:59,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:48:59,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:48:59,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:48:59,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:48:59,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:48:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:48:59,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771118041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:48:59,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:48:59,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-12 20:48:59,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850165782] [2021-06-12 20:48:59,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:48:59,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:48:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:48:59,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:48:59,682 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:00,047 INFO L93 Difference]: Finished difference Result 2567 states and 5154 transitions. [2021-06-12 20:49:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:49:00,047 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:00,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:00,049 INFO L225 Difference]: With dead ends: 2567 [2021-06-12 20:49:00,049 INFO L226 Difference]: Without dead ends: 2346 [2021-06-12 20:49:00,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-12 20:49:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1699. [2021-06-12 20:49:00,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.9976442873969376) internal successors, (3392), 1698 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3392 transitions. [2021-06-12 20:49:00,065 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3392 transitions. Word has length 36 [2021-06-12 20:49:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:00,065 INFO L482 AbstractCegarLoop]: Abstraction has 1699 states and 3392 transitions. [2021-06-12 20:49:00,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:00,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3392 transitions. [2021-06-12 20:49:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:00,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:00,066 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:00,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:00,267 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:00,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1182283007, now seen corresponding path program 76 times [2021-06-12 20:49:00,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:00,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287814032] [2021-06-12 20:49:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:00,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287814032] [2021-06-12 20:49:00,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287814032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:00,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903272825] [2021-06-12 20:49:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:49:00,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:00,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:00,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:00,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:01,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:01,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:01,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:01,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:01,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:01,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:01,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:01,034 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:01,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903272825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:01,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:01,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:49:01,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082407963] [2021-06-12 20:49:01,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:49:01,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:49:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:01,044 INFO L87 Difference]: Start difference. First operand 1699 states and 3392 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:01,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:01,404 INFO L93 Difference]: Finished difference Result 3110 states and 6274 transitions. [2021-06-12 20:49:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:49:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:01,406 INFO L225 Difference]: With dead ends: 3110 [2021-06-12 20:49:01,406 INFO L226 Difference]: Without dead ends: 3051 [2021-06-12 20:49:01,407 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 618.6ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-12 20:49:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1690. [2021-06-12 20:49:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.9964476021314388) internal successors, (3372), 1689 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3372 transitions. [2021-06-12 20:49:01,445 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3372 transitions. Word has length 36 [2021-06-12 20:49:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:01,445 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 3372 transitions. [2021-06-12 20:49:01,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3372 transitions. [2021-06-12 20:49:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:01,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:01,446 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:01,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:01,647 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:01,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash -806053023, now seen corresponding path program 77 times [2021-06-12 20:49:01,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:01,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835488579] [2021-06-12 20:49:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:01,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:01,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835488579] [2021-06-12 20:49:01,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835488579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:01,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411371335] [2021-06-12 20:49:01,908 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 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 20:49:01,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:49:01,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:01,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:01,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:02,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:02,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:02,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:02,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:02,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:02,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:02,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:02,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:02,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:02,448 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:02,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411371335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:02,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:02,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:02,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913446376] [2021-06-12 20:49:02,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:02,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:02,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:02,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:02,449 INFO L87 Difference]: Start difference. First operand 1690 states and 3372 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:02,730 INFO L93 Difference]: Finished difference Result 2909 states and 5872 transitions. [2021-06-12 20:49:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:02,730 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:02,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:02,733 INFO L225 Difference]: With dead ends: 2909 [2021-06-12 20:49:02,733 INFO L226 Difference]: Without dead ends: 2846 [2021-06-12 20:49:02,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 630.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-12 20:49:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1717. [2021-06-12 20:49:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 1.9965034965034965) internal successors, (3426), 1716 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3426 transitions. [2021-06-12 20:49:02,750 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3426 transitions. Word has length 36 [2021-06-12 20:49:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:02,750 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3426 transitions. [2021-06-12 20:49:02,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3426 transitions. [2021-06-12 20:49:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:02,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:02,752 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:02,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:02,952 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:02,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:02,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100107, now seen corresponding path program 78 times [2021-06-12 20:49:02,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:02,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869716509] [2021-06-12 20:49:02,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:02,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:03,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:03,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869716509] [2021-06-12 20:49:03,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869716509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:03,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742534371] [2021-06-12 20:49:03,216 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 20:49:03,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:49:03,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:03,243 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:03,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:03,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:03,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:03,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:03,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:03,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:03,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:03,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:03,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:03,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742534371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:03,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:03,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:03,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801808442] [2021-06-12 20:49:03,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:03,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:03,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:03,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:03,757 INFO L87 Difference]: Start difference. First operand 1717 states and 3426 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:04,165 INFO L93 Difference]: Finished difference Result 2369 states and 4761 transitions. [2021-06-12 20:49:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:49:04,165 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:04,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:04,167 INFO L225 Difference]: With dead ends: 2369 [2021-06-12 20:49:04,167 INFO L226 Difference]: Without dead ends: 2347 [2021-06-12 20:49:04,167 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 629.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:04,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-06-12 20:49:04,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1726. [2021-06-12 20:49:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-06-12 20:49:04,183 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-06-12 20:49:04,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:04,183 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-06-12 20:49:04,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-06-12 20:49:04,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:04,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:04,185 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:04,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:04,385 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:04,386 INFO L82 PathProgramCache]: Analyzing trace with hash -336531133, now seen corresponding path program 79 times [2021-06-12 20:49:04,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:04,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393446711] [2021-06-12 20:49:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:04,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:04,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393446711] [2021-06-12 20:49:04,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393446711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:04,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090087464] [2021-06-12 20:49:04,636 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 20:49:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:04,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:04,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:05,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:05,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:05,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:05,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:05,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:05,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:05,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:05,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:05,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090087464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:05,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:05,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:05,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562053263] [2021-06-12 20:49:05,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:05,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:05,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:05,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:05,225 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:05,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:05,596 INFO L93 Difference]: Finished difference Result 2328 states and 4682 transitions. [2021-06-12 20:49:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 20:49:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:05,599 INFO L225 Difference]: With dead ends: 2328 [2021-06-12 20:49:05,599 INFO L226 Difference]: Without dead ends: 2305 [2021-06-12 20:49:05,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 650.4ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:05,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-06-12 20:49:05,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1726. [2021-06-12 20:49:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-06-12 20:49:05,626 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-06-12 20:49:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:05,626 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-06-12 20:49:05,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-06-12 20:49:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:05,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:05,630 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:05,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:05,846 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:05,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:05,846 INFO L82 PathProgramCache]: Analyzing trace with hash 666409005, now seen corresponding path program 80 times [2021-06-12 20:49:05,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:05,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777467001] [2021-06-12 20:49:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:06,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:06,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777467001] [2021-06-12 20:49:06,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777467001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:06,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455602349] [2021-06-12 20:49:06,088 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 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 20:49:06,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:06,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:06,114 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 20:49:06,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:06,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:06,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:06,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:06,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:06,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:06,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-06-12 20:49:06,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:06,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:06,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:06,618 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-12 20:49:06,626 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:06,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455602349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:06,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:06,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:06,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688061639] [2021-06-12 20:49:06,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:06,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:06,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:06,627 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:07,224 INFO L93 Difference]: Finished difference Result 2252 states and 4526 transitions. [2021-06-12 20:49:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 20:49:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:07,226 INFO L225 Difference]: With dead ends: 2252 [2021-06-12 20:49:07,227 INFO L226 Difference]: Without dead ends: 2228 [2021-06-12 20:49:07,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 611.6ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-12 20:49:07,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1729. [2021-06-12 20:49:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.9965277777777777) internal successors, (3450), 1728 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:07,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3450 transitions. [2021-06-12 20:49:07,256 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3450 transitions. Word has length 36 [2021-06-12 20:49:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:07,257 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3450 transitions. [2021-06-12 20:49:07,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:07,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3450 transitions. [2021-06-12 20:49:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:07,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:07,258 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:07,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:07,459 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:07,460 INFO L82 PathProgramCache]: Analyzing trace with hash -30986797, now seen corresponding path program 81 times [2021-06-12 20:49:07,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:07,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092872974] [2021-06-12 20:49:07,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:07,726 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:49:07,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:07,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092872974] [2021-06-12 20:49:07,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092872974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:07,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680505031] [2021-06-12 20:49:07,726 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 20:49:07,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:49:07,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:07,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:07,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:08,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:08,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:08,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:08,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:08,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:08,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:08,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:08,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:08,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680505031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:08,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:08,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-06-12 20:49:08,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007755749] [2021-06-12 20:49:08,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:08,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:08,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:08,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:08,282 INFO L87 Difference]: Start difference. First operand 1729 states and 3450 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:08,768 INFO L93 Difference]: Finished difference Result 3640 states and 7355 transitions. [2021-06-12 20:49:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:08,769 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:08,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:08,772 INFO L225 Difference]: With dead ends: 3640 [2021-06-12 20:49:08,772 INFO L226 Difference]: Without dead ends: 3597 [2021-06-12 20:49:08,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 739.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:49:08,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-06-12 20:49:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 1800. [2021-06-12 20:49:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 1.991106170094497) internal successors, (3582), 1799 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3582 transitions. [2021-06-12 20:49:08,792 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3582 transitions. Word has length 36 [2021-06-12 20:49:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:08,792 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 3582 transitions. [2021-06-12 20:49:08,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:08,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3582 transitions. [2021-06-12 20:49:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:08,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:08,794 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:08,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:08,994 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash 564785227, now seen corresponding path program 82 times [2021-06-12 20:49:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:08,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415221540] [2021-06-12 20:49:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:09,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:09,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415221540] [2021-06-12 20:49:09,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415221540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:09,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113791115] [2021-06-12 20:49:09,278 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 20:49:09,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:09,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:09,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:09,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:09,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:09,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:09,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:09,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:09,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:09,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:09,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:09,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:09,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113791115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:09,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:09,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-12 20:49:09,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315149015] [2021-06-12 20:49:09,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 20:49:09,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:09,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 20:49:09,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:09,860 INFO L87 Difference]: Start difference. First operand 1800 states and 3582 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:10,519 INFO L93 Difference]: Finished difference Result 3718 states and 7520 transitions. [2021-06-12 20:49:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:49:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:10,523 INFO L225 Difference]: With dead ends: 3718 [2021-06-12 20:49:10,523 INFO L226 Difference]: Without dead ends: 3670 [2021-06-12 20:49:10,523 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 807.2ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:49:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-06-12 20:49:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 1884. [2021-06-12 20:49:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 1.9867233138608604) internal successors, (3741), 1883 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 3741 transitions. [2021-06-12 20:49:10,554 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 3741 transitions. Word has length 36 [2021-06-12 20:49:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:10,554 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 3741 transitions. [2021-06-12 20:49:10,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 3741 transitions. [2021-06-12 20:49:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:10,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:10,557 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:10,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-12 20:49:10,780 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:10,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:10,780 INFO L82 PathProgramCache]: Analyzing trace with hash 453739667, now seen corresponding path program 83 times [2021-06-12 20:49:10,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:10,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418263322] [2021-06-12 20:49:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:11,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:11,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418263322] [2021-06-12 20:49:11,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418263322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:11,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826961761] [2021-06-12 20:49:11,075 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 20:49:11,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:49:11,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:11,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:49:11,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:11,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:11,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:11,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:11,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:11,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:11,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:11,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:11,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:11,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:11,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:11,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826961761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:11,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:11,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-12 20:49:11,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369317282] [2021-06-12 20:49:11,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 20:49:11,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 20:49:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:11,650 INFO L87 Difference]: Start difference. First operand 1884 states and 3741 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:12,561 INFO L93 Difference]: Finished difference Result 3721 states and 7510 transitions. [2021-06-12 20:49:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:49:12,562 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:12,565 INFO L225 Difference]: With dead ends: 3721 [2021-06-12 20:49:12,565 INFO L226 Difference]: Without dead ends: 3678 [2021-06-12 20:49:12,565 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 846.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:49:12,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-06-12 20:49:12,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 1956. [2021-06-12 20:49:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.984143222506394) internal successors, (3879), 1955 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:12,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3879 transitions. [2021-06-12 20:49:12,587 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3879 transitions. Word has length 36 [2021-06-12 20:49:12,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:12,587 INFO L482 AbstractCegarLoop]: Abstraction has 1956 states and 3879 transitions. [2021-06-12 20:49:12,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:12,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3879 transitions. [2021-06-12 20:49:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:12,589 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:12,589 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:12,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:12,793 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:12,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1097891573, now seen corresponding path program 84 times [2021-06-12 20:49:12,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:12,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177875207] [2021-06-12 20:49:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:13,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:13,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177875207] [2021-06-12 20:49:13,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177875207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:13,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603289610] [2021-06-12 20:49:13,078 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 20:49:13,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:49:13,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:13,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:13,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:13,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:13,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:13,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:13,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:13,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:13,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:13,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:13,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:13,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603289610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:13,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:13,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-06-12 20:49:13,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683137180] [2021-06-12 20:49:13,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 20:49:13,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:13,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 20:49:13,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:13,679 INFO L87 Difference]: Start difference. First operand 1956 states and 3879 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:14,472 INFO L93 Difference]: Finished difference Result 3689 states and 7457 transitions. [2021-06-12 20:49:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:49:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:14,475 INFO L225 Difference]: With dead ends: 3689 [2021-06-12 20:49:14,475 INFO L226 Difference]: Without dead ends: 3644 [2021-06-12 20:49:14,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:49:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-12 20:49:14,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 1973. [2021-06-12 20:49:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.9852941176470589) internal successors, (3915), 1972 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 3915 transitions. [2021-06-12 20:49:14,496 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 3915 transitions. Word has length 36 [2021-06-12 20:49:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:14,496 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 3915 transitions. [2021-06-12 20:49:14,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 3915 transitions. [2021-06-12 20:49:14,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:14,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:14,498 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:14,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-12 20:49:14,701 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:14,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:14,701 INFO L82 PathProgramCache]: Analyzing trace with hash -787529803, now seen corresponding path program 85 times [2021-06-12 20:49:14,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:14,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569104308] [2021-06-12 20:49:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:14,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:14,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569104308] [2021-06-12 20:49:14,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569104308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:14,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046804818] [2021-06-12 20:49:14,927 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 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 20:49:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:14,955 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:14,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:15,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:15,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:15,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:15,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:15,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:15,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:15,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:15,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046804818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:15,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:15,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:49:15,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532306708] [2021-06-12 20:49:15,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:49:15,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:15,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:49:15,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:15,464 INFO L87 Difference]: Start difference. First operand 1973 states and 3915 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:15,857 INFO L93 Difference]: Finished difference Result 3068 states and 6162 transitions. [2021-06-12 20:49:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:49:15,857 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:15,860 INFO L225 Difference]: With dead ends: 3068 [2021-06-12 20:49:15,861 INFO L226 Difference]: Without dead ends: 3006 [2021-06-12 20:49:15,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 595.2ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-06-12 20:49:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1967. [2021-06-12 20:49:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 1.9852492370295016) internal successors, (3903), 1966 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3903 transitions. [2021-06-12 20:49:15,888 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3903 transitions. Word has length 36 [2021-06-12 20:49:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:15,888 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 3903 transitions. [2021-06-12 20:49:15,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3903 transitions. [2021-06-12 20:49:15,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:15,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:15,890 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:16,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:16,105 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash -898575363, now seen corresponding path program 86 times [2021-06-12 20:49:16,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:16,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348460729] [2021-06-12 20:49:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:16,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:16,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348460729] [2021-06-12 20:49:16,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348460729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:16,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265661334] [2021-06-12 20:49:16,440 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 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 20:49:16,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:16,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:16,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:17,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:17,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:17,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:17,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:17,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:17,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:17,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:17,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:17,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265661334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:17,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:17,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:17,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075210008] [2021-06-12 20:49:17,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:17,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:17,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:17,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:17,046 INFO L87 Difference]: Start difference. First operand 1967 states and 3903 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:17,669 INFO L93 Difference]: Finished difference Result 3053 states and 6129 transitions. [2021-06-12 20:49:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:17,669 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:17,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:17,671 INFO L225 Difference]: With dead ends: 3053 [2021-06-12 20:49:17,671 INFO L226 Difference]: Without dead ends: 2991 [2021-06-12 20:49:17,672 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-06-12 20:49:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1964. [2021-06-12 20:49:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.9852266938359653) internal successors, (3897), 1963 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3897 transitions. [2021-06-12 20:49:17,691 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3897 transitions. Word has length 36 [2021-06-12 20:49:17,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:17,691 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 3897 transitions. [2021-06-12 20:49:17,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3897 transitions. [2021-06-12 20:49:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:17,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:17,692 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:17,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:17,893 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:17,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:17,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1844760693, now seen corresponding path program 87 times [2021-06-12 20:49:17,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:17,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801616280] [2021-06-12 20:49:17,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:18,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:18,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801616280] [2021-06-12 20:49:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801616280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:18,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181791800] [2021-06-12 20:49:18,162 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 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 20:49:18,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:49:18,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:18,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:18,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:18,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:18,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:18,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:18,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:18,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:18,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:18,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:18,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:18,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:18,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:18,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181791800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:18,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:18,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:18,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232152243] [2021-06-12 20:49:18,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:18,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:18,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:18,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:18,715 INFO L87 Difference]: Start difference. First operand 1964 states and 3897 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:19,040 INFO L93 Difference]: Finished difference Result 3170 states and 6381 transitions. [2021-06-12 20:49:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:19,043 INFO L225 Difference]: With dead ends: 3170 [2021-06-12 20:49:19,043 INFO L226 Difference]: Without dead ends: 3105 [2021-06-12 20:49:19,043 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:19,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-06-12 20:49:19,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1988. [2021-06-12 20:49:19,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 1.9838953195772522) internal successors, (3942), 1987 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3942 transitions. [2021-06-12 20:49:19,062 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3942 transitions. Word has length 36 [2021-06-12 20:49:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:19,062 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 3942 transitions. [2021-06-12 20:49:19,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3942 transitions. [2021-06-12 20:49:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:19,064 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:19,064 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:19,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:19,264 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1808154349, now seen corresponding path program 88 times [2021-06-12 20:49:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:19,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142968937] [2021-06-12 20:49:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:19,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:19,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142968937] [2021-06-12 20:49:19,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142968937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:19,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499990958] [2021-06-12 20:49:19,522 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 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 20:49:19,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:19,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:19,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:19,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:20,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:20,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:20,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:20,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:20,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:20,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:20,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:20,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:20,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:20,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499990958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:20,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:20,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:20,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462268732] [2021-06-12 20:49:20,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:20,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:20,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:20,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:20,079 INFO L87 Difference]: Start difference. First operand 1988 states and 3942 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:20,853 INFO L93 Difference]: Finished difference Result 3044 states and 6092 transitions. [2021-06-12 20:49:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:20,856 INFO L225 Difference]: With dead ends: 3044 [2021-06-12 20:49:20,856 INFO L226 Difference]: Without dead ends: 3002 [2021-06-12 20:49:20,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-06-12 20:49:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 1982. [2021-06-12 20:49:20,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-06-12 20:49:20,875 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-06-12 20:49:20,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:20,875 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-06-12 20:49:20,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:20,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-06-12 20:49:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:20,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:20,877 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:21,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:21,077 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:21,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash 935181707, now seen corresponding path program 89 times [2021-06-12 20:49:21,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:21,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448367873] [2021-06-12 20:49:21,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:21,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:21,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448367873] [2021-06-12 20:49:21,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448367873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:21,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185980145] [2021-06-12 20:49:21,366 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 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 20:49:21,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:49:21,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:21,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:21,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:21,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:21,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:21,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:21,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:21,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:21,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:21,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:21,923 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:21,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185980145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:21,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:21,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:21,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301420824] [2021-06-12 20:49:21,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:21,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:21,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:21,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:21,924 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:22,592 INFO L93 Difference]: Finished difference Result 2927 states and 5852 transitions. [2021-06-12 20:49:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:22,595 INFO L225 Difference]: With dead ends: 2927 [2021-06-12 20:49:22,595 INFO L226 Difference]: Without dead ends: 2904 [2021-06-12 20:49:22,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-06-12 20:49:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1985. [2021-06-12 20:49:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.9838709677419355) internal successors, (3936), 1984 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3936 transitions. [2021-06-12 20:49:22,613 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3936 transitions. Word has length 36 [2021-06-12 20:49:22,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:22,613 INFO L482 AbstractCegarLoop]: Abstraction has 1985 states and 3936 transitions. [2021-06-12 20:49:22,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:22,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3936 transitions. [2021-06-12 20:49:22,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:22,615 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:22,615 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:22,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-12 20:49:22,815 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1938121845, now seen corresponding path program 90 times [2021-06-12 20:49:22,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:22,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703519636] [2021-06-12 20:49:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:23,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:23,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703519636] [2021-06-12 20:49:23,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703519636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:23,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371349855] [2021-06-12 20:49:23,111 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 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 20:49:23,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:49:23,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:23,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:23,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:23,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:23,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:23,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:23,669 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:23,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:23,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:23,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:23,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371349855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:23,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:23,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:23,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885822705] [2021-06-12 20:49:23,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:23,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:23,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:23,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:23,695 INFO L87 Difference]: Start difference. First operand 1985 states and 3936 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:24,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:24,144 INFO L93 Difference]: Finished difference Result 2935 states and 5869 transitions. [2021-06-12 20:49:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:49:24,145 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:24,147 INFO L225 Difference]: With dead ends: 2935 [2021-06-12 20:49:24,147 INFO L226 Difference]: Without dead ends: 2911 [2021-06-12 20:49:24,147 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 701.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:24,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-06-12 20:49:24,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1982. [2021-06-12 20:49:24,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:24,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-06-12 20:49:24,165 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-06-12 20:49:24,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:24,165 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-06-12 20:49:24,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:24,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-06-12 20:49:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:24,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:24,167 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:24,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:24,367 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1884098707, now seen corresponding path program 91 times [2021-06-12 20:49:24,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:24,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691536613] [2021-06-12 20:49:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:24,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:49:24,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:24,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691536613] [2021-06-12 20:49:24,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691536613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:24,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562795698] [2021-06-12 20:49:24,576 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 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 20:49:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:24,602 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:25,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:25,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:25,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:25,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:25,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:25,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:25,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:25,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:25,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:25,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562795698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:25,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:25,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-12 20:49:25,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298503024] [2021-06-12 20:49:25,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:49:25,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:49:25,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:49:25,092 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:25,511 INFO L93 Difference]: Finished difference Result 3201 states and 6417 transitions. [2021-06-12 20:49:25,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:49:25,511 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:25,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:25,514 INFO L225 Difference]: With dead ends: 3201 [2021-06-12 20:49:25,514 INFO L226 Difference]: Without dead ends: 3012 [2021-06-12 20:49:25,514 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 670.2ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-06-12 20:49:25,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2015. [2021-06-12 20:49:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.9821251241310824) internal successors, (3992), 2014 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 3992 transitions. [2021-06-12 20:49:25,533 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 3992 transitions. Word has length 36 [2021-06-12 20:49:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:25,533 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 3992 transitions. [2021-06-12 20:49:25,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 3992 transitions. [2021-06-12 20:49:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:25,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:25,535 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:25,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-12 20:49:25,735 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:25,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1940533323, now seen corresponding path program 92 times [2021-06-12 20:49:25,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:25,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719712233] [2021-06-12 20:49:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:25,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:25,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719712233] [2021-06-12 20:49:25,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719712233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:25,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402803457] [2021-06-12 20:49:25,946 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 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 20:49:25,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:25,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:26,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:26,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:26,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:26,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:26,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:26,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:26,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:26,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402803457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:26,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:26,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-12 20:49:26,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480728196] [2021-06-12 20:49:26,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:49:26,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:26,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:49:26,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:49:26,464 INFO L87 Difference]: Start difference. First operand 2015 states and 3992 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:27,140 INFO L93 Difference]: Finished difference Result 3283 states and 6567 transitions. [2021-06-12 20:49:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:49:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:27,142 INFO L225 Difference]: With dead ends: 3283 [2021-06-12 20:49:27,142 INFO L226 Difference]: Without dead ends: 3078 [2021-06-12 20:49:27,143 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 732.7ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:49:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-12 20:49:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2009. [2021-06-12 20:49:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 1.9810756972111554) internal successors, (3978), 2008 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3978 transitions. [2021-06-12 20:49:27,160 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3978 transitions. Word has length 36 [2021-06-12 20:49:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:27,160 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 3978 transitions. [2021-06-12 20:49:27,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3978 transitions. [2021-06-12 20:49:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:27,162 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:27,162 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:27,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:27,362 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash 518734893, now seen corresponding path program 93 times [2021-06-12 20:49:27,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:27,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966618750] [2021-06-12 20:49:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:27,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:27,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966618750] [2021-06-12 20:49:27,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966618750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:27,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646663245] [2021-06-12 20:49:27,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:49:27,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:49:27,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:27,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:27,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:28,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:28,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:28,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:28,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:28,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:28,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:28,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:28,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:28,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:28,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646663245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:28,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:28,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:49:28,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358766907] [2021-06-12 20:49:28,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:49:28,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:49:28,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:28,113 INFO L87 Difference]: Start difference. First operand 2009 states and 3978 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:28,696 INFO L93 Difference]: Finished difference Result 2891 states and 5824 transitions. [2021-06-12 20:49:28,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:49:28,697 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:28,699 INFO L225 Difference]: With dead ends: 2891 [2021-06-12 20:49:28,699 INFO L226 Difference]: Without dead ends: 2834 [2021-06-12 20:49:28,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 585.5ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-12 20:49:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2006. [2021-06-12 20:49:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 1.9810473815461347) internal successors, (3972), 2005 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3972 transitions. [2021-06-12 20:49:28,717 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3972 transitions. Word has length 36 [2021-06-12 20:49:28,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:28,717 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 3972 transitions. [2021-06-12 20:49:28,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3972 transitions. [2021-06-12 20:49:28,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:28,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:28,718 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:28,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:28,919 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:28,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:28,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1829487763, now seen corresponding path program 94 times [2021-06-12 20:49:28,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:28,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201326433] [2021-06-12 20:49:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:29,146 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:29,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:29,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201326433] [2021-06-12 20:49:29,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201326433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:29,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908982235] [2021-06-12 20:49:29,147 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 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 20:49:29,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:29,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:29,173 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:29,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:29,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:29,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:29,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:29,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:29,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:29,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:29,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:29,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:29,694 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:29,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908982235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:29,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:29,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:49:29,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215473271] [2021-06-12 20:49:29,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:49:29,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:29,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:49:29,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:29,705 INFO L87 Difference]: Start difference. First operand 2006 states and 3972 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:30,568 INFO L93 Difference]: Finished difference Result 3270 states and 6540 transitions. [2021-06-12 20:49:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:49:30,568 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:30,572 INFO L225 Difference]: With dead ends: 3270 [2021-06-12 20:49:30,572 INFO L226 Difference]: Without dead ends: 3074 [2021-06-12 20:49:30,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 841.1ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:49:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-06-12 20:49:30,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2030. [2021-06-12 20:49:30,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.9817644159684573) internal successors, (4021), 2029 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4021 transitions. [2021-06-12 20:49:30,592 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4021 transitions. Word has length 36 [2021-06-12 20:49:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:30,592 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 4021 transitions. [2021-06-12 20:49:30,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4021 transitions. [2021-06-12 20:49:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:30,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:30,593 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:30,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 20:49:30,794 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash 407689333, now seen corresponding path program 95 times [2021-06-12 20:49:30,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:30,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736520126] [2021-06-12 20:49:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:31,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:31,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736520126] [2021-06-12 20:49:31,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736520126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:31,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376764162] [2021-06-12 20:49:31,053 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 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 20:49:31,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:49:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:31,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:31,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:31,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:31,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:31,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:31,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:31,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:31,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:31,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:31,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:31,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:31,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376764162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:31,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:31,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:31,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371074817] [2021-06-12 20:49:31,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:31,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:31,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:31,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:31,593 INFO L87 Difference]: Start difference. First operand 2030 states and 4021 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:32,122 INFO L93 Difference]: Finished difference Result 3018 states and 6082 transitions. [2021-06-12 20:49:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:49:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:32,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:32,125 INFO L225 Difference]: With dead ends: 3018 [2021-06-12 20:49:32,125 INFO L226 Difference]: Without dead ends: 2956 [2021-06-12 20:49:32,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 644.1ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-06-12 20:49:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2051. [2021-06-12 20:49:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-06-12 20:49:32,153 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-06-12 20:49:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:32,153 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-06-12 20:49:32,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-06-12 20:49:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:32,155 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:32,155 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:32,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 20:49:32,355 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:32,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1143941907, now seen corresponding path program 96 times [2021-06-12 20:49:32,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:32,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451462093] [2021-06-12 20:49:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:32,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451462093] [2021-06-12 20:49:32,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451462093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:32,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637116083] [2021-06-12 20:49:32,664 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 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 20:49:32,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:49:32,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:32,696 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 20:49:32,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:33,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:33,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:33,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:33,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-06-12 20:49:33,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:33,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:33,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:33,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-12 20:49:33,206 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:33,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637116083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:33,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:33,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:33,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789535317] [2021-06-12 20:49:33,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:33,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:33,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:33,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:33,207 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:33,533 INFO L93 Difference]: Finished difference Result 2747 states and 5507 transitions. [2021-06-12 20:49:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:49:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:33,535 INFO L225 Difference]: With dead ends: 2747 [2021-06-12 20:49:33,535 INFO L226 Difference]: Without dead ends: 2724 [2021-06-12 20:49:33,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 685.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-06-12 20:49:33,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2051. [2021-06-12 20:49:33,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-06-12 20:49:33,561 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-06-12 20:49:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:33,561 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-06-12 20:49:33,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-06-12 20:49:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:33,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:33,562 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:33,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:33,763 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:33,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:33,763 INFO L82 PathProgramCache]: Analyzing trace with hash 939265351, now seen corresponding path program 97 times [2021-06-12 20:49:33,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:33,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924973525] [2021-06-12 20:49:33,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:49:34,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:34,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924973525] [2021-06-12 20:49:34,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924973525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:34,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699369977] [2021-06-12 20:49:34,011 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 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 20:49:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:34,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:34,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:34,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:34,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:34,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:34,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:34,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:34,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:34,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699369977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:34,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:34,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-12 20:49:34,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025316684] [2021-06-12 20:49:34,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:49:34,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:49:34,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:49:34,528 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:34,932 INFO L93 Difference]: Finished difference Result 3042 states and 6095 transitions. [2021-06-12 20:49:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:49:34,932 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:34,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:34,935 INFO L225 Difference]: With dead ends: 3042 [2021-06-12 20:49:34,935 INFO L226 Difference]: Without dead ends: 2834 [2021-06-12 20:49:34,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 701.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:34,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-12 20:49:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2141. [2021-06-12 20:49:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 1.983177570093458) internal successors, (4244), 2140 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 4244 transitions. [2021-06-12 20:49:34,954 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 4244 transitions. Word has length 36 [2021-06-12 20:49:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:34,954 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 4244 transitions. [2021-06-12 20:49:34,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 4244 transitions. [2021-06-12 20:49:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:34,955 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:34,956 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:35,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 20:49:35,156 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash -534706753, now seen corresponding path program 98 times [2021-06-12 20:49:35,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:35,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232102220] [2021-06-12 20:49:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:35,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:35,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232102220] [2021-06-12 20:49:35,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232102220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:35,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641023997] [2021-06-12 20:49:35,402 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 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 20:49:35,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:35,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:35,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:35,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:35,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:35,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:35,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:35,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:35,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:35,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:35,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:35,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:35,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641023997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:35,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:35,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:49:35,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716523855] [2021-06-12 20:49:35,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:49:35,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:35,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:49:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:35,934 INFO L87 Difference]: Start difference. First operand 2141 states and 4244 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:36,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:36,509 INFO L93 Difference]: Finished difference Result 3881 states and 7802 transitions. [2021-06-12 20:49:36,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:49:36,509 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:36,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:36,513 INFO L225 Difference]: With dead ends: 3881 [2021-06-12 20:49:36,513 INFO L226 Difference]: Without dead ends: 3816 [2021-06-12 20:49:36,513 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 632.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-12 20:49:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2072. [2021-06-12 20:49:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.981651376146789) internal successors, (4104), 2071 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4104 transitions. [2021-06-12 20:49:36,536 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4104 transitions. Word has length 36 [2021-06-12 20:49:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:36,536 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4104 transitions. [2021-06-12 20:49:36,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4104 transitions. [2021-06-12 20:49:36,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:36,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:36,538 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:36,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 20:49:36,738 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:36,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:36,739 INFO L82 PathProgramCache]: Analyzing trace with hash -501889653, now seen corresponding path program 99 times [2021-06-12 20:49:36,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:36,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490060777] [2021-06-12 20:49:36,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:37,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:37,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490060777] [2021-06-12 20:49:37,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490060777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:37,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6796469] [2021-06-12 20:49:37,015 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 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 20:49:37,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:49:37,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:37,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:37,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:37,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:37,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:37,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:37,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:37,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:37,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:37,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:37,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:37,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6796469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:37,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:37,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:37,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250167517] [2021-06-12 20:49:37,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:37,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:37,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:37,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:37,569 INFO L87 Difference]: Start difference. First operand 2072 states and 4104 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:38,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:38,014 INFO L93 Difference]: Finished difference Result 3168 states and 6373 transitions. [2021-06-12 20:49:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:49:38,014 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:38,017 INFO L225 Difference]: With dead ends: 3168 [2021-06-12 20:49:38,017 INFO L226 Difference]: Without dead ends: 3111 [2021-06-12 20:49:38,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-06-12 20:49:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2114. [2021-06-12 20:49:38,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:38,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-12 20:49:38,042 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-12 20:49:38,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:38,042 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-12 20:49:38,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:38,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-12 20:49:38,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:38,044 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:38,044 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:38,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 20:49:38,251 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:38,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2053520893, now seen corresponding path program 100 times [2021-06-12 20:49:38,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:38,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971772229] [2021-06-12 20:49:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:38,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:38,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971772229] [2021-06-12 20:49:38,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971772229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:38,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703271461] [2021-06-12 20:49:38,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:49:38,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:38,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:38,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:38,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:39,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:39,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:39,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:39,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:39,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:39,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:39,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:39,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703271461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:39,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:39,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:39,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078273655] [2021-06-12 20:49:39,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:39,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:39,067 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:39,396 INFO L93 Difference]: Finished difference Result 2764 states and 5529 transitions. [2021-06-12 20:49:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:49:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:39,399 INFO L225 Difference]: With dead ends: 2764 [2021-06-12 20:49:39,399 INFO L226 Difference]: Without dead ends: 2741 [2021-06-12 20:49:39,399 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-06-12 20:49:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2114. [2021-06-12 20:49:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-12 20:49:39,418 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-12 20:49:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:39,418 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-12 20:49:39,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-12 20:49:39,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:39,419 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:39,419 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:39,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:39,620 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:39,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:39,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1050580755, now seen corresponding path program 101 times [2021-06-12 20:49:39,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:39,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142970569] [2021-06-12 20:49:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:39,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:39,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142970569] [2021-06-12 20:49:39,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142970569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:39,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709148223] [2021-06-12 20:49:39,877 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 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 20:49:39,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:49:39,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:39,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:40,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:40,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:40,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:40,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:40,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:40,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:40,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:40,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:40,461 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:40,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709148223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:40,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:40,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:40,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279065927] [2021-06-12 20:49:40,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:40,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:40,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:40,462 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:40,958 INFO L93 Difference]: Finished difference Result 2775 states and 5552 transitions. [2021-06-12 20:49:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:49:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:40,961 INFO L225 Difference]: With dead ends: 2775 [2021-06-12 20:49:40,961 INFO L226 Difference]: Without dead ends: 2751 [2021-06-12 20:49:40,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 654.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-06-12 20:49:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2114. [2021-06-12 20:49:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:40,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-06-12 20:49:40,984 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-06-12 20:49:40,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:40,984 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-06-12 20:49:40,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-06-12 20:49:40,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:40,986 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:40,986 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:41,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 20:49:41,186 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:41,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:41,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1598664591, now seen corresponding path program 102 times [2021-06-12 20:49:41,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:41,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232134087] [2021-06-12 20:49:41,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:49:41,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232134087] [2021-06-12 20:49:41,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232134087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:41,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711973363] [2021-06-12 20:49:41,426 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 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 20:49:41,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:49:41,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:41,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:49:41,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:41,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:41,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:41,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:41,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:41,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:41,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:41,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711973363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:41,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:41,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-06-12 20:49:41,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132430172] [2021-06-12 20:49:41,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:49:41,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:41,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:49:41,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:49:41,997 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:42,394 INFO L93 Difference]: Finished difference Result 3031 states and 6075 transitions. [2021-06-12 20:49:42,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:49:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:42,397 INFO L225 Difference]: With dead ends: 3031 [2021-06-12 20:49:42,397 INFO L226 Difference]: Without dead ends: 2851 [2021-06-12 20:49:42,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 716.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:42,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-12 20:49:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2204. [2021-06-12 20:49:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9809350885156605) internal successors, (4364), 2203 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4364 transitions. [2021-06-12 20:49:42,416 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4364 transitions. Word has length 36 [2021-06-12 20:49:42,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:42,416 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4364 transitions. [2021-06-12 20:49:42,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:42,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4364 transitions. [2021-06-12 20:49:42,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:42,418 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:42,418 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:42,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-12 20:49:42,619 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:42,619 INFO L82 PathProgramCache]: Analyzing trace with hash 124692487, now seen corresponding path program 103 times [2021-06-12 20:49:42,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:42,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62248633] [2021-06-12 20:49:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:42,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:42,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62248633] [2021-06-12 20:49:42,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62248633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:42,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699195702] [2021-06-12 20:49:42,871 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 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 20:49:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:42,896 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:42,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:43,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:43,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:43,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:43,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:43,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:43,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:43,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:43,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:43,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699195702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:43,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:43,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:49:43,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857844809] [2021-06-12 20:49:43,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:49:43,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:43,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:49:43,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:43,409 INFO L87 Difference]: Start difference. First operand 2204 states and 4364 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:43,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:43,781 INFO L93 Difference]: Finished difference Result 3432 states and 6914 transitions. [2021-06-12 20:49:43,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:49:43,781 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:43,784 INFO L225 Difference]: With dead ends: 3432 [2021-06-12 20:49:43,784 INFO L226 Difference]: Without dead ends: 3379 [2021-06-12 20:49:43,784 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 637.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:43,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-06-12 20:49:43,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 2192. [2021-06-12 20:49:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.9808306709265175) internal successors, (4340), 2191 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 4340 transitions. [2021-06-12 20:49:43,810 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 4340 transitions. Word has length 36 [2021-06-12 20:49:43,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:43,810 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 4340 transitions. [2021-06-12 20:49:43,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 4340 transitions. [2021-06-12 20:49:43,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:43,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:43,812 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:44,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:44,018 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:44,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1579308017, now seen corresponding path program 104 times [2021-06-12 20:49:44,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:44,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015098844] [2021-06-12 20:49:44,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:44,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:44,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:44,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015098844] [2021-06-12 20:49:44,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015098844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:44,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335581769] [2021-06-12 20:49:44,248 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 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 20:49:44,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:44,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:44,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:44,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:44,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:44,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:44,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:44,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:44,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:44,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:44,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:44,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:44,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:44,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335581769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:44,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:44,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:49:44,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613114960] [2021-06-12 20:49:44,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:49:44,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:49:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:44,785 INFO L87 Difference]: Start difference. First operand 2192 states and 4340 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:45,332 INFO L93 Difference]: Finished difference Result 3344 states and 6703 transitions. [2021-06-12 20:49:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:49:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:45,336 INFO L225 Difference]: With dead ends: 3344 [2021-06-12 20:49:45,336 INFO L226 Difference]: Without dead ends: 3283 [2021-06-12 20:49:45,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 626.2ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-06-12 20:49:45,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2207. [2021-06-12 20:49:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.9805077062556664) internal successors, (4369), 2206 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 4369 transitions. [2021-06-12 20:49:45,359 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 4369 transitions. Word has length 36 [2021-06-12 20:49:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:45,359 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 4369 transitions. [2021-06-12 20:49:45,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:45,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 4369 transitions. [2021-06-12 20:49:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:45,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:45,361 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:45,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:45,562 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:45,562 INFO L82 PathProgramCache]: Analyzing trace with hash 157509587, now seen corresponding path program 105 times [2021-06-12 20:49:45,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:45,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732747717] [2021-06-12 20:49:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:45,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:45,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732747717] [2021-06-12 20:49:45,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732747717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:45,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822034141] [2021-06-12 20:49:45,813 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 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 20:49:45,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:49:45,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:45,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:45,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:46,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:46,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:46,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:46,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:46,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:46,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:46,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:46,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:46,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:46,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822034141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:46,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:46,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:46,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680834072] [2021-06-12 20:49:46,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:46,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:46,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:46,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:46,371 INFO L87 Difference]: Start difference. First operand 2207 states and 4369 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:46,724 INFO L93 Difference]: Finished difference Result 3254 states and 6538 transitions. [2021-06-12 20:49:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:49:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:46,727 INFO L225 Difference]: With dead ends: 3254 [2021-06-12 20:49:46,727 INFO L226 Difference]: Without dead ends: 3197 [2021-06-12 20:49:46,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-06-12 20:49:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2195. [2021-06-12 20:49:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.980401093892434) internal successors, (4345), 2194 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4345 transitions. [2021-06-12 20:49:46,749 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4345 transitions. Word has length 36 [2021-06-12 20:49:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:46,749 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 4345 transitions. [2021-06-12 20:49:46,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4345 transitions. [2021-06-12 20:49:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:46,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:46,750 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:46,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:46,968 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:46,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:46,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1394121653, now seen corresponding path program 106 times [2021-06-12 20:49:46,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:46,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356178713] [2021-06-12 20:49:46,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:47,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:47,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356178713] [2021-06-12 20:49:47,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356178713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:47,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515239533] [2021-06-12 20:49:47,231 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 20:49:47,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:47,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:47,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:47,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:47,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:47,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:47,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:47,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:47,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:47,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:47,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:47,836 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:47,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515239533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:47,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:47,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:47,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652286296] [2021-06-12 20:49:47,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:47,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:47,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:47,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:47,837 INFO L87 Difference]: Start difference. First operand 2195 states and 4345 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:48,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:48,377 INFO L93 Difference]: Finished difference Result 2867 states and 5731 transitions. [2021-06-12 20:49:48,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:49:48,377 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:48,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:48,380 INFO L225 Difference]: With dead ends: 2867 [2021-06-12 20:49:48,380 INFO L226 Difference]: Without dead ends: 2844 [2021-06-12 20:49:48,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2021-06-12 20:49:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2204. [2021-06-12 20:49:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:48,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-06-12 20:49:48,401 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-06-12 20:49:48,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:48,402 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-06-12 20:49:48,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:48,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-06-12 20:49:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:48,404 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:48,404 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:48,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:48,605 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash -391181515, now seen corresponding path program 107 times [2021-06-12 20:49:48,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:48,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908621933] [2021-06-12 20:49:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:48,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908621933] [2021-06-12 20:49:48,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908621933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:48,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489343436] [2021-06-12 20:49:48,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:49:48,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:49:48,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:48,910 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:48,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:49,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:49,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:49,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:49,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:49,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:49,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:49,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:49,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:49,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:49,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:49,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489343436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:49,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:49,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:49,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636709743] [2021-06-12 20:49:49,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:49,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:49,435 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:49,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:49,934 INFO L93 Difference]: Finished difference Result 2878 states and 5754 transitions. [2021-06-12 20:49:49,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 20:49:49,935 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:49,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:49,937 INFO L225 Difference]: With dead ends: 2878 [2021-06-12 20:49:49,937 INFO L226 Difference]: Without dead ends: 2854 [2021-06-12 20:49:49,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 663.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-06-12 20:49:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2204. [2021-06-12 20:49:49,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-06-12 20:49:49,955 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-06-12 20:49:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:49,955 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-06-12 20:49:49,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-06-12 20:49:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:49,956 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:49,956 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:50,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 20:49:50,158 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:50,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:50,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1155151443, now seen corresponding path program 108 times [2021-06-12 20:49:50,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:50,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770633141] [2021-06-12 20:49:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:50,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:50,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770633141] [2021-06-12 20:49:50,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770633141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:50,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943440626] [2021-06-12 20:49:50,407 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 20:49:50,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:49:50,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:50,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 20:49:50,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:50,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:50,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:50,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:50,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:50,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:50,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:50,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:50,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:50,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:50,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:50,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943440626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:50,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:50,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:50,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657247827] [2021-06-12 20:49:50,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:50,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:50,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:50,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:50,997 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:51,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:51,494 INFO L93 Difference]: Finished difference Result 3075 states and 6179 transitions. [2021-06-12 20:49:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:49:51,494 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:51,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:51,496 INFO L225 Difference]: With dead ends: 3075 [2021-06-12 20:49:51,496 INFO L226 Difference]: Without dead ends: 2931 [2021-06-12 20:49:51,497 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:49:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-06-12 20:49:51,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2247. [2021-06-12 20:49:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.9821905609973285) internal successors, (4452), 2246 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:51,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 4452 transitions. [2021-06-12 20:49:51,518 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 4452 transitions. Word has length 36 [2021-06-12 20:49:51,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:51,518 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 4452 transitions. [2021-06-12 20:49:51,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:51,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 4452 transitions. [2021-06-12 20:49:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:51,519 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:51,519 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:51,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-12 20:49:51,720 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:51,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1735088919, now seen corresponding path program 109 times [2021-06-12 20:49:51,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:51,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909561222] [2021-06-12 20:49:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:49:51,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:51,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909561222] [2021-06-12 20:49:51,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909561222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:51,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118307503] [2021-06-12 20:49:51,952 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:49:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:51,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:51,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:52,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:52,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:52,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:52,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:52,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:52,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:52,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:52,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:52,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118307503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:52,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:52,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-06-12 20:49:52,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694725662] [2021-06-12 20:49:52,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:49:52,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:52,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:49:52,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:49:52,474 INFO L87 Difference]: Start difference. First operand 2247 states and 4452 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:52,944 INFO L93 Difference]: Finished difference Result 4634 states and 9317 transitions. [2021-06-12 20:49:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:49:52,944 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:52,948 INFO L225 Difference]: With dead ends: 4634 [2021-06-12 20:49:52,949 INFO L226 Difference]: Without dead ends: 4591 [2021-06-12 20:49:52,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 705.3ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:49:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-06-12 20:49:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 2286. [2021-06-12 20:49:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 1.9785557986870896) internal successors, (4521), 2285 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:52,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4521 transitions. [2021-06-12 20:49:52,977 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4521 transitions. Word has length 36 [2021-06-12 20:49:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:52,978 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 4521 transitions. [2021-06-12 20:49:52,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:52,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4521 transitions. [2021-06-12 20:49:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:52,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:52,979 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:53,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-12 20:49:53,180 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:53,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1139316895, now seen corresponding path program 110 times [2021-06-12 20:49:53,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:53,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856352104] [2021-06-12 20:49:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:53,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:53,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856352104] [2021-06-12 20:49:53,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856352104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:53,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756846042] [2021-06-12 20:49:53,579 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 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 20:49:53,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:49:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:53,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 20:49:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:54,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:54,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-06-12 20:49:54,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:54,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:54,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:54,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-06-12 20:49:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:54,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756846042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:54,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:54,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:54,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863819125] [2021-06-12 20:49:54,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:54,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:54,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:54,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:54,287 INFO L87 Difference]: Start difference. First operand 2286 states and 4521 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:54,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:54,941 INFO L93 Difference]: Finished difference Result 4423 states and 8911 transitions. [2021-06-12 20:49:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:49:54,941 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:54,945 INFO L225 Difference]: With dead ends: 4423 [2021-06-12 20:49:54,945 INFO L226 Difference]: Without dead ends: 4375 [2021-06-12 20:49:54,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 960.3ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:49:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2021-06-12 20:49:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 2331. [2021-06-12 20:49:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 1.978969957081545) internal successors, (4611), 2330 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:54,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4611 transitions. [2021-06-12 20:49:54,973 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4611 transitions. Word has length 36 [2021-06-12 20:49:54,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:54,973 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 4611 transitions. [2021-06-12 20:49:54,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:54,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4611 transitions. [2021-06-12 20:49:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:54,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:54,976 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:55,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:55,199 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:55,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:55,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1250362455, now seen corresponding path program 111 times [2021-06-12 20:49:55,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:55,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932483889] [2021-06-12 20:49:55,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:55,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:55,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932483889] [2021-06-12 20:49:55,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932483889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:55,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821281037] [2021-06-12 20:49:55,453 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 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 20:49:55,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:49:55,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:55,480 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:55,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:55,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:55,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:55,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:55,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:55,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:55,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:55,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:55,973 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:56,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821281037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:56,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:56,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:56,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872776621] [2021-06-12 20:49:56,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:56,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:56,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:56,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:56,006 INFO L87 Difference]: Start difference. First operand 2331 states and 4611 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:56,721 INFO L93 Difference]: Finished difference Result 4274 states and 8601 transitions. [2021-06-12 20:49:56,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:49:56,722 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:56,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:56,726 INFO L225 Difference]: With dead ends: 4274 [2021-06-12 20:49:56,726 INFO L226 Difference]: Without dead ends: 4231 [2021-06-12 20:49:56,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 789.2ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:49:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-12 20:49:56,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2382. [2021-06-12 20:49:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 1.9794204115917682) internal successors, (4713), 2381 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 4713 transitions. [2021-06-12 20:49:56,753 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 4713 transitions. Word has length 36 [2021-06-12 20:49:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:56,753 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 4713 transitions. [2021-06-12 20:49:56,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 4713 transitions. [2021-06-12 20:49:56,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:56,755 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:56,755 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:56,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 20:49:56,957 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1492973601, now seen corresponding path program 112 times [2021-06-12 20:49:56,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:56,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568719247] [2021-06-12 20:49:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:57,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:57,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568719247] [2021-06-12 20:49:57,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568719247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:57,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530178393] [2021-06-12 20:49:57,222 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 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 20:49:57,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:49:57,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:57,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:49:57,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:57,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:57,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:57,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:49:57,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:57,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:57,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:57,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:49:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:57,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530178393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:57,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:57,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-06-12 20:49:57,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145725202] [2021-06-12 20:49:57,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 20:49:57,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:57,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 20:49:57,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:49:57,785 INFO L87 Difference]: Start difference. First operand 2382 states and 4713 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:58,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:49:58,502 INFO L93 Difference]: Finished difference Result 4262 states and 8590 transitions. [2021-06-12 20:49:58,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:49:58,502 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:49:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:49:58,506 INFO L225 Difference]: With dead ends: 4262 [2021-06-12 20:49:58,506 INFO L226 Difference]: Without dead ends: 4200 [2021-06-12 20:49:58,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 835.0ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:49:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-12 20:49:58,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 2372. [2021-06-12 20:49:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 1.9801771404470687) internal successors, (4695), 2371 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 4695 transitions. [2021-06-12 20:49:58,531 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 4695 transitions. Word has length 36 [2021-06-12 20:49:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:49:58,531 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 4695 transitions. [2021-06-12 20:49:58,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:49:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 4695 transitions. [2021-06-12 20:49:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:49:58,533 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:49:58,533 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:49:58,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:49:58,733 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:49:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:49:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash 140658571, now seen corresponding path program 113 times [2021-06-12 20:49:58,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:49:58,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525991376] [2021-06-12 20:49:58,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:49:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:49:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:58,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:49:58,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525991376] [2021-06-12 20:49:58,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525991376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:58,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023075930] [2021-06-12 20:49:58,984 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 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 20:49:59,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:49:59,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:49:59,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:49:59,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:49:59,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:59,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:59,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:59,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:49:59,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:49:59,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-12 20:49:59,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:49:59,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:49:59,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:49:59,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-12 20:49:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:49:59,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023075930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:49:59,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:49:59,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-12 20:49:59,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750553206] [2021-06-12 20:49:59,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 20:49:59,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:49:59,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 20:49:59,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:49:59,637 INFO L87 Difference]: Start difference. First operand 2372 states and 4695 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:01,226 INFO L93 Difference]: Finished difference Result 3919 states and 7823 transitions. [2021-06-12 20:50:01,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:50:01,227 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:01,230 INFO L225 Difference]: With dead ends: 3919 [2021-06-12 20:50:01,230 INFO L226 Difference]: Without dead ends: 3722 [2021-06-12 20:50:01,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1409.2ms TimeCoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 20:50:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-06-12 20:50:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2432. [2021-06-12 20:50:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 1.9819004524886878) internal successors, (4818), 2431 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 4818 transitions. [2021-06-12 20:50:01,265 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 4818 transitions. Word has length 36 [2021-06-12 20:50:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:01,265 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 4818 transitions. [2021-06-12 20:50:01,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 4818 transitions. [2021-06-12 20:50:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:01,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:01,268 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:01,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-12 20:50:01,468 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:01,468 INFO L82 PathProgramCache]: Analyzing trace with hash -768920415, now seen corresponding path program 114 times [2021-06-12 20:50:01,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:01,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138495458] [2021-06-12 20:50:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:01,755 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:01,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138495458] [2021-06-12 20:50:01,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138495458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460656901] [2021-06-12 20:50:01,756 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 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 20:50:01,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:50:01,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:01,807 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 20:50:01,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:02,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:02,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:02,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:02,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:02,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:02,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:02,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:02,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:02,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460656901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:02,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:02,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-12 20:50:02,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245241080] [2021-06-12 20:50:02,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:50:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:50:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:02,317 INFO L87 Difference]: Start difference. First operand 2432 states and 4818 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:02,768 INFO L93 Difference]: Finished difference Result 3994 states and 7991 transitions. [2021-06-12 20:50:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:02,769 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:02,772 INFO L225 Difference]: With dead ends: 3994 [2021-06-12 20:50:02,772 INFO L226 Difference]: Without dead ends: 3807 [2021-06-12 20:50:02,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 679.6ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:02,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-12 20:50:02,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2486. [2021-06-12 20:50:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-06-12 20:50:02,797 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-06-12 20:50:02,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:02,798 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-06-12 20:50:02,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-06-12 20:50:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:02,799 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:02,799 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:03,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:03,000 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:03,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:03,000 INFO L82 PathProgramCache]: Analyzing trace with hash 234019723, now seen corresponding path program 115 times [2021-06-12 20:50:03,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:03,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194263123] [2021-06-12 20:50:03,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:03,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:03,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194263123] [2021-06-12 20:50:03,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194263123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:03,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310354883] [2021-06-12 20:50:03,255 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 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 20:50:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:03,280 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:03,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:03,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:03,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:03,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:03,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:03,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:03,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:03,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310354883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:03,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:03,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-12 20:50:03,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875869396] [2021-06-12 20:50:03,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:50:03,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:03,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:50:03,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:03,797 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:04,385 INFO L93 Difference]: Finished difference Result 3663 states and 7313 transitions. [2021-06-12 20:50:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:04,386 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:04,389 INFO L225 Difference]: With dead ends: 3663 [2021-06-12 20:50:04,389 INFO L226 Difference]: Without dead ends: 3639 [2021-06-12 20:50:04,389 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 650.9ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-06-12 20:50:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2486. [2021-06-12 20:50:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-06-12 20:50:04,417 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-06-12 20:50:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:04,417 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-06-12 20:50:04,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:04,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-06-12 20:50:04,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:04,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:04,420 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:04,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:04,633 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:04,633 INFO L82 PathProgramCache]: Analyzing trace with hash 726123041, now seen corresponding path program 116 times [2021-06-12 20:50:04,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:04,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388266143] [2021-06-12 20:50:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:04,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:04,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388266143] [2021-06-12 20:50:04,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388266143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:04,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701246381] [2021-06-12 20:50:04,918 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 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 20:50:04,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:04,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:04,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:05,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:05,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:05,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:05,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:05,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:05,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:05,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:05,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:05,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:05,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701246381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:05,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:05,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2021-06-12 20:50:05,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227007656] [2021-06-12 20:50:05,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:50:05,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:05,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:50:05,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:05,473 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:05,877 INFO L93 Difference]: Finished difference Result 3578 states and 7155 transitions. [2021-06-12 20:50:05,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:50:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:05,881 INFO L225 Difference]: With dead ends: 3578 [2021-06-12 20:50:05,881 INFO L226 Difference]: Without dead ends: 3364 [2021-06-12 20:50:05,882 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 731.3ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:05,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-06-12 20:50:05,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 2624. [2021-06-12 20:50:05,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 1.9797941288600838) internal successors, (5193), 2623 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 5193 transitions. [2021-06-12 20:50:05,909 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 5193 transitions. Word has length 36 [2021-06-12 20:50:05,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:05,909 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 5193 transitions. [2021-06-12 20:50:05,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:05,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 5193 transitions. [2021-06-12 20:50:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:05,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:05,911 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:06,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-06-12 20:50:06,112 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:06,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:06,112 INFO L82 PathProgramCache]: Analyzing trace with hash 144742215, now seen corresponding path program 117 times [2021-06-12 20:50:06,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:06,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541045727] [2021-06-12 20:50:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:50:06,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:06,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541045727] [2021-06-12 20:50:06,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541045727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:06,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113676898] [2021-06-12 20:50:06,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:50:06,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:50:06,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:06,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:06,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:06,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:06,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:06,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:06,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:06,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:06,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113676898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:06,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:06,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-06-12 20:50:06,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304909510] [2021-06-12 20:50:06,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:50:06,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:50:06,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:50:06,811 INFO L87 Difference]: Start difference. First operand 2624 states and 5193 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:07,310 INFO L93 Difference]: Finished difference Result 3703 states and 7416 transitions. [2021-06-12 20:50:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:50:07,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:07,314 INFO L225 Difference]: With dead ends: 3703 [2021-06-12 20:50:07,314 INFO L226 Difference]: Without dead ends: 3490 [2021-06-12 20:50:07,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 649.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-12 20:50:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2501. [2021-06-12 20:50:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-06-12 20:50:07,341 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-06-12 20:50:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:07,341 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-06-12 20:50:07,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-06-12 20:50:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:07,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:07,343 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:07,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-12 20:50:07,543 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:07,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1446923267, now seen corresponding path program 118 times [2021-06-12 20:50:07,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:07,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961468811] [2021-06-12 20:50:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:07,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:07,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961468811] [2021-06-12 20:50:07,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961468811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:07,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098038484] [2021-06-12 20:50:07,801 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 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 20:50:07,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:07,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:07,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:07,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:08,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:08,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:08,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:08,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:08,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:08,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:08,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098038484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:08,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:08,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-12 20:50:08,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096043924] [2021-06-12 20:50:08,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:50:08,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:08,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:50:08,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:08,325 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:09,121 INFO L93 Difference]: Finished difference Result 3628 states and 7297 transitions. [2021-06-12 20:50:09,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:09,121 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:09,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:09,124 INFO L225 Difference]: With dead ends: 3628 [2021-06-12 20:50:09,124 INFO L226 Difference]: Without dead ends: 3563 [2021-06-12 20:50:09,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 645.8ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:09,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-12 20:50:09,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2501. [2021-06-12 20:50:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-06-12 20:50:09,148 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-06-12 20:50:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:09,148 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-06-12 20:50:09,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:09,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-06-12 20:50:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:09,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:09,150 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:09,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:09,350 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash 537344281, now seen corresponding path program 119 times [2021-06-12 20:50:09,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:09,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857330055] [2021-06-12 20:50:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:09,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:09,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857330055] [2021-06-12 20:50:09,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857330055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:09,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874770437] [2021-06-12 20:50:09,619 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 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 20:50:09,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:50:09,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:09,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:50:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:10,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:10,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:10,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:10,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:10,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-12 20:50:10,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:10,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:10,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:10,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-12 20:50:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:10,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874770437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:10,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:10,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-06-12 20:50:10,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447375823] [2021-06-12 20:50:10,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 20:50:10,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:10,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 20:50:10,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:50:10,265 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:11,905 INFO L93 Difference]: Finished difference Result 3874 states and 7764 transitions. [2021-06-12 20:50:11,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:50:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:11,909 INFO L225 Difference]: With dead ends: 3874 [2021-06-12 20:50:11,909 INFO L226 Difference]: Without dead ends: 3713 [2021-06-12 20:50:11,909 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1612.3ms TimeCoverageRelationStatistics Valid=214, Invalid=2648, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 20:50:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-06-12 20:50:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2540. [2021-06-12 20:50:11,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:11,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-06-12 20:50:11,934 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-06-12 20:50:11,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:11,934 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-06-12 20:50:11,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:11,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-06-12 20:50:11,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:11,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:11,935 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:12,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 20:50:12,136 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:12,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1540284419, now seen corresponding path program 120 times [2021-06-12 20:50:12,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:12,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220617354] [2021-06-12 20:50:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:12,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:12,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220617354] [2021-06-12 20:50:12,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220617354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:12,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232676817] [2021-06-12 20:50:12,394 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 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 20:50:12,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:50:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:12,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:12,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:12,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:12,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:12,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:12,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:12,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:12,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:12,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:12,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232676817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:12,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:12,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-12 20:50:12,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864387300] [2021-06-12 20:50:12,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:50:12,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:12,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:50:12,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:12,943 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:13,598 INFO L93 Difference]: Finished difference Result 3517 states and 7032 transitions. [2021-06-12 20:50:13,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:13,598 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:13,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:13,601 INFO L225 Difference]: With dead ends: 3517 [2021-06-12 20:50:13,601 INFO L226 Difference]: Without dead ends: 3493 [2021-06-12 20:50:13,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 634.6ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:13,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-06-12 20:50:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2540. [2021-06-12 20:50:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-06-12 20:50:13,632 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-06-12 20:50:13,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:13,632 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-06-12 20:50:13,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-06-12 20:50:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:13,634 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:13,634 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:13,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:13,834 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1196743521, now seen corresponding path program 121 times [2021-06-12 20:50:13,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:13,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683629066] [2021-06-12 20:50:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:14,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:14,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683629066] [2021-06-12 20:50:14,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683629066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:14,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778351834] [2021-06-12 20:50:14,095 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 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 20:50:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:14,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:14,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:14,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:14,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:14,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:14,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:14,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:14,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:14,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:14,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778351834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:14,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:14,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-12 20:50:14,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426179098] [2021-06-12 20:50:14,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:50:14,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:14,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:50:14,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:14,660 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:15,060 INFO L93 Difference]: Finished difference Result 3604 states and 7227 transitions. [2021-06-12 20:50:15,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:15,060 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:15,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:15,063 INFO L225 Difference]: With dead ends: 3604 [2021-06-12 20:50:15,063 INFO L226 Difference]: Without dead ends: 3560 [2021-06-12 20:50:15,063 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-06-12 20:50:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2534. [2021-06-12 20:50:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-06-12 20:50:15,087 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-06-12 20:50:15,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:15,087 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-06-12 20:50:15,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-06-12 20:50:15,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:15,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:15,089 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:15,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-12 20:50:15,291 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:15,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2095283637, now seen corresponding path program 122 times [2021-06-12 20:50:15,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:15,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231408943] [2021-06-12 20:50:15,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:15,553 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:15,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:15,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231408943] [2021-06-12 20:50:15,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231408943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:15,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858066728] [2021-06-12 20:50:15,553 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 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 20:50:15,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:15,579 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:16,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:16,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:16,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:16,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:16,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:16,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:16,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:16,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:16,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:16,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858066728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:16,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:16,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-12 20:50:16,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008662196] [2021-06-12 20:50:16,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:50:16,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:16,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:50:16,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:16,075 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:16,696 INFO L93 Difference]: Finished difference Result 3514 states and 7026 transitions. [2021-06-12 20:50:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:16,696 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:16,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:16,699 INFO L225 Difference]: With dead ends: 3514 [2021-06-12 20:50:16,699 INFO L226 Difference]: Without dead ends: 3490 [2021-06-12 20:50:16,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-06-12 20:50:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2531. [2021-06-12 20:50:16,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 1.9837944664031621) internal successors, (5019), 2530 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 5019 transitions. [2021-06-12 20:50:16,724 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 5019 transitions. Word has length 36 [2021-06-12 20:50:16,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:16,724 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 5019 transitions. [2021-06-12 20:50:16,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:16,725 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 5019 transitions. [2021-06-12 20:50:16,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:16,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:16,726 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:16,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:16,928 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1435713731, now seen corresponding path program 123 times [2021-06-12 20:50:16,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:16,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222092227] [2021-06-12 20:50:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:17,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:17,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222092227] [2021-06-12 20:50:17,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222092227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:17,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187319929] [2021-06-12 20:50:17,188 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 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 20:50:17,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:50:17,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:17,222 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:17,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:17,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:17,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:17,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:17,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:17,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:17,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:17,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:17,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:17,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187319929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:17,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:17,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-06-12 20:50:17,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300737416] [2021-06-12 20:50:17,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 20:50:17,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:17,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 20:50:17,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:17,739 INFO L87 Difference]: Start difference. First operand 2531 states and 5019 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:18,477 INFO L93 Difference]: Finished difference Result 3529 states and 7060 transitions. [2021-06-12 20:50:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:18,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:18,480 INFO L225 Difference]: With dead ends: 3529 [2021-06-12 20:50:18,480 INFO L226 Difference]: Without dead ends: 3504 [2021-06-12 20:50:18,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-06-12 20:50:18,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 2534. [2021-06-12 20:50:18,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-06-12 20:50:18,506 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-06-12 20:50:18,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:18,506 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-06-12 20:50:18,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:18,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-06-12 20:50:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:18,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:18,508 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:18,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 20:50:18,709 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:18,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:18,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1768497397, now seen corresponding path program 124 times [2021-06-12 20:50:18,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:18,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365564088] [2021-06-12 20:50:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:19,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:19,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365564088] [2021-06-12 20:50:19,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365564088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:19,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643588975] [2021-06-12 20:50:19,106 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 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 20:50:19,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:19,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:19,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:19,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:19,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:19,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:19,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:19,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:19,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:19,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:19,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:19,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643588975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:19,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:19,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-12 20:50:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634809237] [2021-06-12 20:50:19,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:50:19,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:50:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:50:19,689 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 20:50:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:20,106 INFO L93 Difference]: Finished difference Result 3439 states and 6862 transitions. [2021-06-12 20:50:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:50:20,106 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-12 20:50:20,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:20,110 INFO L225 Difference]: With dead ends: 3439 [2021-06-12 20:50:20,110 INFO L226 Difference]: Without dead ends: 3280 [2021-06-12 20:50:20,110 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 831.2ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:20,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-12 20:50:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2606. [2021-06-12 20:50:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.982341650671785) internal successors, (5164), 2605 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 5164 transitions. [2021-06-12 20:50:20,137 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 5164 transitions. Word has length 36 [2021-06-12 20:50:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:20,137 INFO L482 AbstractCegarLoop]: Abstraction has 2606 states and 5164 transitions. [2021-06-12 20:50:20,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 20:50:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 5164 transitions. [2021-06-12 20:50:20,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:20,139 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:20,139 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:20,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 20:50:20,339 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:20,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1516299603, now seen corresponding path program 125 times [2021-06-12 20:50:20,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:20,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392230674] [2021-06-12 20:50:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:20,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:20,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392230674] [2021-06-12 20:50:20,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392230674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:20,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673042662] [2021-06-12 20:50:20,581 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 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 20:50:20,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:50:20,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:20,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:50:20,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:21,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:21,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:21,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:21,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:21,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:21,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:21,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:21,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:21,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673042662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:21,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:21,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-12 20:50:21,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651874342] [2021-06-12 20:50:21,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:50:21,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:21,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:50:21,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:50:21,050 INFO L87 Difference]: Start difference. First operand 2606 states and 5164 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 20:50:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:21,575 INFO L93 Difference]: Finished difference Result 3655 states and 7282 transitions. [2021-06-12 20:50:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:50:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-12 20:50:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:21,578 INFO L225 Difference]: With dead ends: 3655 [2021-06-12 20:50:21,578 INFO L226 Difference]: Without dead ends: 3429 [2021-06-12 20:50:21,578 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-06-12 20:50:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2750. [2021-06-12 20:50:21,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.9774463441251364) internal successors, (5436), 2749 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 5436 transitions. [2021-06-12 20:50:21,603 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 5436 transitions. Word has length 36 [2021-06-12 20:50:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:21,603 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 5436 transitions. [2021-06-12 20:50:21,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 20:50:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 5436 transitions. [2021-06-12 20:50:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:21,605 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:21,605 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:21,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:21,806 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:21,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1945089073, now seen corresponding path program 126 times [2021-06-12 20:50:21,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:21,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288435227] [2021-06-12 20:50:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:22,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:22,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288435227] [2021-06-12 20:50:22,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288435227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:22,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813687709] [2021-06-12 20:50:22,123 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 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 20:50:22,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:50:22,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:22,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:22,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:22,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:22,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:22,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:22,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:22,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:22,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:22,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:22,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:22,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813687709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:22,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:22,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-12 20:50:22,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004429101] [2021-06-12 20:50:22,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:22,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:22,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:22,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:22,708 INFO L87 Difference]: Start difference. First operand 2750 states and 5436 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:23,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:23,378 INFO L93 Difference]: Finished difference Result 4517 states and 8999 transitions. [2021-06-12 20:50:23,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:50:23,378 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:23,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:23,382 INFO L225 Difference]: With dead ends: 4517 [2021-06-12 20:50:23,382 INFO L226 Difference]: Without dead ends: 4275 [2021-06-12 20:50:23,383 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 841.9ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:50:23,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-06-12 20:50:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3137. [2021-06-12 20:50:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 1.9716198979591837) internal successors, (6183), 3136 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 6183 transitions. [2021-06-12 20:50:23,415 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 6183 transitions. Word has length 36 [2021-06-12 20:50:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:23,415 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 6183 transitions. [2021-06-12 20:50:23,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 6183 transitions. [2021-06-12 20:50:23,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:23,429 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:23,429 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:23,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:23,630 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1047697171, now seen corresponding path program 127 times [2021-06-12 20:50:23,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:23,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904516199] [2021-06-12 20:50:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:23,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:23,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904516199] [2021-06-12 20:50:23,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904516199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:23,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786424225] [2021-06-12 20:50:23,889 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 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 20:50:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:23,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:23,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:24,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:24,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:24,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:24,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:24,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:24,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:24,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786424225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:24,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:24,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-12 20:50:24,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37609132] [2021-06-12 20:50:24,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:24,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:24,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:24,383 INFO L87 Difference]: Start difference. First operand 3137 states and 6183 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:24,960 INFO L93 Difference]: Finished difference Result 4057 states and 8128 transitions. [2021-06-12 20:50:24,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:24,961 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-12 20:50:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:24,964 INFO L225 Difference]: With dead ends: 4057 [2021-06-12 20:50:24,964 INFO L226 Difference]: Without dead ends: 3966 [2021-06-12 20:50:24,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 605.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-06-12 20:50:24,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3158. [2021-06-12 20:50:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 1.9718086791257523) internal successors, (6225), 3157 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:24,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 6225 transitions. [2021-06-12 20:50:24,993 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 6225 transitions. Word has length 36 [2021-06-12 20:50:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:24,993 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 6225 transitions. [2021-06-12 20:50:24,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:24,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 6225 transitions. [2021-06-12 20:50:24,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:24,995 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:24,995 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:25,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:25,196 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:25,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1035510087, now seen corresponding path program 128 times [2021-06-12 20:50:25,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:25,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015715933] [2021-06-12 20:50:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:25,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:25,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:25,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015715933] [2021-06-12 20:50:25,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015715933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:25,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819782968] [2021-06-12 20:50:25,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:50:25,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:25,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:25,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:25,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:25,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:25,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:25,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:25,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:25,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:25,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:25,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819782968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:25,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:25,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-12 20:50:25,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129083651] [2021-06-12 20:50:25,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:50:25,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:25,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:50:25,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:50:25,902 INFO L87 Difference]: Start difference. First operand 3158 states and 6225 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 20:50:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:26,390 INFO L93 Difference]: Finished difference Result 4075 states and 8096 transitions. [2021-06-12 20:50:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:26,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-12 20:50:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:26,394 INFO L225 Difference]: With dead ends: 4075 [2021-06-12 20:50:26,394 INFO L226 Difference]: Without dead ends: 3853 [2021-06-12 20:50:26,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 720.1ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:26,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2021-06-12 20:50:26,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3251. [2021-06-12 20:50:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 3250 states have (on average 1.9726153846153847) internal successors, (6411), 3250 states have internal predecessors, (6411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 6411 transitions. [2021-06-12 20:50:26,426 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 6411 transitions. Word has length 36 [2021-06-12 20:50:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:26,426 INFO L482 AbstractCegarLoop]: Abstraction has 3251 states and 6411 transitions. [2021-06-12 20:50:26,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 20:50:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 6411 transitions. [2021-06-12 20:50:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:26,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:26,428 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:26,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:26,629 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash -438462017, now seen corresponding path program 129 times [2021-06-12 20:50:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408962253] [2021-06-12 20:50:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:26,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:26,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408962253] [2021-06-12 20:50:26,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408962253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:26,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435273020] [2021-06-12 20:50:26,885 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 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 20:50:26,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:50:26,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:26,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:27,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:27,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:27,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:27,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:27,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:27,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:27,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:27,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:27,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435273020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:27,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:27,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-12 20:50:27,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467597263] [2021-06-12 20:50:27,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:50:27,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:27,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:50:27,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:27,356 INFO L87 Difference]: Start difference. First operand 3251 states and 6411 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 20:50:27,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:27,818 INFO L93 Difference]: Finished difference Result 5265 states and 10504 transitions. [2021-06-12 20:50:27,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:50:27,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 36 [2021-06-12 20:50:27,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:27,822 INFO L225 Difference]: With dead ends: 5265 [2021-06-12 20:50:27,823 INFO L226 Difference]: Without dead ends: 5202 [2021-06-12 20:50:27,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2021-06-12 20:50:27,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 3164. [2021-06-12 20:50:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 1.971862156180841) internal successors, (6237), 3163 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 6237 transitions. [2021-06-12 20:50:27,859 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 6237 transitions. Word has length 36 [2021-06-12 20:50:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:27,859 INFO L482 AbstractCegarLoop]: Abstraction has 3164 states and 6237 transitions. [2021-06-12 20:50:27,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 20:50:27,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 6237 transitions. [2021-06-12 20:50:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:27,861 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:27,861 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:28,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-12 20:50:28,062 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:28,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:28,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1957276157, now seen corresponding path program 130 times [2021-06-12 20:50:28,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:28,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774079518] [2021-06-12 20:50:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:28,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:28,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774079518] [2021-06-12 20:50:28,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774079518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:28,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711614878] [2021-06-12 20:50:28,317 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 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 20:50:28,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:28,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:28,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:28,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:28,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:28,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:28,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:28,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:28,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:28,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:28,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:28,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:28,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711614878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:28,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:28,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-12 20:50:28,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850481749] [2021-06-12 20:50:28,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:28,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:28,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:28,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:28,833 INFO L87 Difference]: Start difference. First operand 3164 states and 6237 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:29,441 INFO L93 Difference]: Finished difference Result 4252 states and 8498 transitions. [2021-06-12 20:50:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-12 20:50:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:29,445 INFO L225 Difference]: With dead ends: 4252 [2021-06-12 20:50:29,445 INFO L226 Difference]: Without dead ends: 4193 [2021-06-12 20:50:29,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 608.0ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-12 20:50:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3191. [2021-06-12 20:50:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-06-12 20:50:29,475 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-06-12 20:50:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:29,476 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-06-12 20:50:29,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-06-12 20:50:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:29,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:29,478 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:29,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-12 20:50:29,678 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:29,678 INFO L82 PathProgramCache]: Analyzing trace with hash -954336019, now seen corresponding path program 131 times [2021-06-12 20:50:29,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:29,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17368771] [2021-06-12 20:50:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:29,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:29,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17368771] [2021-06-12 20:50:29,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17368771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:29,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127661376] [2021-06-12 20:50:29,984 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 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 20:50:30,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:50:30,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:30,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:30,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:30,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:30,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:30,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:30,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:30,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:30,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:30,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:30,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:30,557 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:30,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127661376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:30,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:30,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-12 20:50:30,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388758862] [2021-06-12 20:50:30,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:30,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:30,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:30,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:30,558 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:30,829 INFO L93 Difference]: Finished difference Result 3853 states and 7654 transitions. [2021-06-12 20:50:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-12 20:50:30,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:30,833 INFO L225 Difference]: With dead ends: 3853 [2021-06-12 20:50:30,833 INFO L226 Difference]: Without dead ends: 3829 [2021-06-12 20:50:30,833 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 703.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-06-12 20:50:30,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3191. [2021-06-12 20:50:30,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-06-12 20:50:30,864 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-06-12 20:50:30,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:30,864 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-06-12 20:50:30,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:30,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-06-12 20:50:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:30,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:30,866 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:31,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 20:50:31,067 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1694909327, now seen corresponding path program 132 times [2021-06-12 20:50:31,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:31,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597794455] [2021-06-12 20:50:31,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:31,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597794455] [2021-06-12 20:50:31,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597794455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:31,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227185226] [2021-06-12 20:50:31,340 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 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 20:50:31,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:50:31,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:31,367 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:31,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:31,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:31,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:31,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:31,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:31,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:31,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:31,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227185226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:31,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:31,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-06-12 20:50:31,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308982042] [2021-06-12 20:50:31,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:50:31,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:31,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:50:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:50:31,817 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 20:50:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:32,278 INFO L93 Difference]: Finished difference Result 4117 states and 8186 transitions. [2021-06-12 20:50:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:32,278 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 36 [2021-06-12 20:50:32,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:32,282 INFO L225 Difference]: With dead ends: 4117 [2021-06-12 20:50:32,282 INFO L226 Difference]: Without dead ends: 3907 [2021-06-12 20:50:32,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 761.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-12 20:50:32,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3290. [2021-06-12 20:50:32,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.9723320158102766) internal successors, (6487), 3289 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:32,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 6487 transitions. [2021-06-12 20:50:32,311 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 6487 transitions. Word has length 36 [2021-06-12 20:50:32,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:32,311 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 6487 transitions. [2021-06-12 20:50:32,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 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 20:50:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 6487 transitions. [2021-06-12 20:50:32,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:32,313 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:32,313 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:32,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:32,514 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash 220937223, now seen corresponding path program 133 times [2021-06-12 20:50:32,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:32,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865133697] [2021-06-12 20:50:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:32,775 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:32,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:32,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865133697] [2021-06-12 20:50:32,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865133697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:32,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957329780] [2021-06-12 20:50:32,775 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 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 20:50:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:32,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:33,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:33,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:33,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:33,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:33,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:33,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:33,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:33,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:33,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957329780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:33,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:33,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-12 20:50:33,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180835640] [2021-06-12 20:50:33,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:50:33,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:33,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:50:33,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:33,261 INFO L87 Difference]: Start difference. First operand 3290 states and 6487 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 20:50:33,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:33,705 INFO L93 Difference]: Finished difference Result 4583 states and 9168 transitions. [2021-06-12 20:50:33,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:50:33,706 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 36 [2021-06-12 20:50:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:33,710 INFO L225 Difference]: With dead ends: 4583 [2021-06-12 20:50:33,710 INFO L226 Difference]: Without dead ends: 4530 [2021-06-12 20:50:33,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 611.7ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4530 states. [2021-06-12 20:50:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4530 to 3230. [2021-06-12 20:50:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.9733663672963766) internal successors, (6372), 3229 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 6372 transitions. [2021-06-12 20:50:33,745 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 6372 transitions. Word has length 36 [2021-06-12 20:50:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:33,745 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 6372 transitions. [2021-06-12 20:50:33,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 20:50:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 6372 transitions. [2021-06-12 20:50:33,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:33,747 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:33,747 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:33,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-12 20:50:33,948 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:33,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:33,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1675552753, now seen corresponding path program 134 times [2021-06-12 20:50:33,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:33,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45112327] [2021-06-12 20:50:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:33,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:34,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:34,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45112327] [2021-06-12 20:50:34,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45112327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:34,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321230312] [2021-06-12 20:50:34,278 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 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 20:50:34,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:34,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:34,319 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:34,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:34,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:34,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:34,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:34,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:34,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:34,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:34,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:34,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:34,790 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:34,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321230312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:34,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:34,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-12 20:50:34,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080890234] [2021-06-12 20:50:34,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:50:34,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:34,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:50:34,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:34,791 INFO L87 Difference]: Start difference. First operand 3230 states and 6372 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 20:50:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:35,174 INFO L93 Difference]: Finished difference Result 4673 states and 9315 transitions. [2021-06-12 20:50:35,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:50:35,174 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 36 [2021-06-12 20:50:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:35,179 INFO L225 Difference]: With dead ends: 4673 [2021-06-12 20:50:35,179 INFO L226 Difference]: Without dead ends: 4610 [2021-06-12 20:50:35,179 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 690.8ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-06-12 20:50:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3248. [2021-06-12 20:50:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 1.9728980597474592) internal successors, (6406), 3247 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 6406 transitions. [2021-06-12 20:50:35,214 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 6406 transitions. Word has length 36 [2021-06-12 20:50:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:35,214 INFO L482 AbstractCegarLoop]: Abstraction has 3248 states and 6406 transitions. [2021-06-12 20:50:35,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 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 20:50:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 6406 transitions. [2021-06-12 20:50:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:35,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:35,216 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:35,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:35,417 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:35,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:35,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1297876917, now seen corresponding path program 135 times [2021-06-12 20:50:35,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:35,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163783106] [2021-06-12 20:50:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:35,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:35,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163783106] [2021-06-12 20:50:35,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163783106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:35,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118071269] [2021-06-12 20:50:35,691 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 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 20:50:35,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:50:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:35,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:35,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:36,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:36,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:36,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:36,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:36,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:36,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:36,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:36,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:36,179 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:36,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118071269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:36,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:36,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-12 20:50:36,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106353145] [2021-06-12 20:50:36,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:36,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:36,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:36,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:36,180 INFO L87 Difference]: Start difference. First operand 3248 states and 6406 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:36,684 INFO L93 Difference]: Finished difference Result 4370 states and 8737 transitions. [2021-06-12 20:50:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-12 20:50:36,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:36,688 INFO L225 Difference]: With dead ends: 4370 [2021-06-12 20:50:36,688 INFO L226 Difference]: Without dead ends: 4311 [2021-06-12 20:50:36,688 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:36,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-12 20:50:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3263. [2021-06-12 20:50:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-12 20:50:36,720 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-12 20:50:36,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:36,720 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-12 20:50:36,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:36,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-12 20:50:36,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:36,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:36,722 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:36,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:36,922 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:36,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:36,923 INFO L82 PathProgramCache]: Analyzing trace with hash -294936779, now seen corresponding path program 136 times [2021-06-12 20:50:36,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:36,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624133894] [2021-06-12 20:50:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:37,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:37,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624133894] [2021-06-12 20:50:37,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624133894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:37,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439397780] [2021-06-12 20:50:37,181 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 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 20:50:37,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:37,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:37,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:37,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:37,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:37,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:37,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:37,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:37,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:37,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:37,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:37,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:37,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439397780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:37,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:37,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-12 20:50:37,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376994362] [2021-06-12 20:50:37,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:37,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:37,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:37,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:37,668 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:38,120 INFO L93 Difference]: Finished difference Result 3962 states and 7874 transitions. [2021-06-12 20:50:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:38,120 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-12 20:50:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:38,124 INFO L225 Difference]: With dead ends: 3962 [2021-06-12 20:50:38,124 INFO L226 Difference]: Without dead ends: 3938 [2021-06-12 20:50:38,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 610.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:38,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-06-12 20:50:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3263. [2021-06-12 20:50:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-12 20:50:38,154 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-12 20:50:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:38,154 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-12 20:50:38,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-12 20:50:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:38,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:38,156 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:38,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:38,357 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:38,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1058906707, now seen corresponding path program 137 times [2021-06-12 20:50:38,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:38,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639391456] [2021-06-12 20:50:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:38,625 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:38,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:38,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639391456] [2021-06-12 20:50:38,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639391456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:38,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764350035] [2021-06-12 20:50:38,626 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 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 20:50:38,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:50:38,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:38,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-06-12 20:50:38,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:39,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:39,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:39,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:39,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:39,122 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:39,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:39,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:39,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764350035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:39,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:39,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-12 20:50:39,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457043020] [2021-06-12 20:50:39,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:39,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:39,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:39,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:39,158 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:39,554 INFO L93 Difference]: Finished difference Result 3982 states and 7910 transitions. [2021-06-12 20:50:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:50:39,554 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 36 [2021-06-12 20:50:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:39,558 INFO L225 Difference]: With dead ends: 3982 [2021-06-12 20:50:39,558 INFO L226 Difference]: Without dead ends: 3948 [2021-06-12 20:50:39,559 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 628.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-06-12 20:50:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-12 20:50:39,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3263. [2021-06-12 20:50:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-06-12 20:50:39,593 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-06-12 20:50:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:39,593 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-06-12 20:50:39,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 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 20:50:39,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-06-12 20:50:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:39,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:39,596 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:39,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:39,796 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash -532135131, now seen corresponding path program 138 times [2021-06-12 20:50:39,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:39,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767871324] [2021-06-12 20:50:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:50:40,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:40,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767871324] [2021-06-12 20:50:40,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767871324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:40,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038152616] [2021-06-12 20:50:40,057 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 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 20:50:40,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:50:40,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:40,083 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:40,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:40,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:40,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:40,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:40,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:40,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:40,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:40,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038152616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:40,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:40,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-06-12 20:50:40,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735545229] [2021-06-12 20:50:40,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 20:50:40,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 20:50:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-12 20:50:40,497 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 20:50:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:40,963 INFO L93 Difference]: Finished difference Result 4128 states and 8203 transitions. [2021-06-12 20:50:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:50:40,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 36 [2021-06-12 20:50:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:40,967 INFO L225 Difference]: With dead ends: 4128 [2021-06-12 20:50:40,967 INFO L226 Difference]: Without dead ends: 3903 [2021-06-12 20:50:40,967 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 752.6ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-12 20:50:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2021-06-12 20:50:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3338. [2021-06-12 20:50:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9733293377284986) internal successors, (6585), 3337 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6585 transitions. [2021-06-12 20:50:40,998 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6585 transitions. Word has length 36 [2021-06-12 20:50:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:40,999 INFO L482 AbstractCegarLoop]: Abstraction has 3338 states and 6585 transitions. [2021-06-12 20:50:40,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 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 20:50:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6585 transitions. [2021-06-12 20:50:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:41,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:41,001 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:41,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:41,201 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:41,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:41,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2006107235, now seen corresponding path program 139 times [2021-06-12 20:50:41,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:41,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045927830] [2021-06-12 20:50:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:41,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045927830] [2021-06-12 20:50:41,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045927830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:41,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399825598] [2021-06-12 20:50:41,524 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 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 20:50:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:41,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:41,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:42,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:42,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:42,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:42,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:42,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:42,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399825598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:42,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:42,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-06-12 20:50:42,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075682230] [2021-06-12 20:50:42,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:50:42,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:50:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:50:42,061 INFO L87 Difference]: Start difference. First operand 3338 states and 6585 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 20:50:42,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:42,420 INFO L93 Difference]: Finished difference Result 4598 states and 9201 transitions. [2021-06-12 20:50:42,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:42,420 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 36 [2021-06-12 20:50:42,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:42,424 INFO L225 Difference]: With dead ends: 4598 [2021-06-12 20:50:42,424 INFO L226 Difference]: Without dead ends: 4545 [2021-06-12 20:50:42,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:42,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-06-12 20:50:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3326. [2021-06-12 20:50:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.973233082706767) internal successors, (6561), 3325 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 6561 transitions. [2021-06-12 20:50:42,460 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 6561 transitions. Word has length 36 [2021-06-12 20:50:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:42,460 INFO L482 AbstractCegarLoop]: Abstraction has 3326 states and 6561 transitions. [2021-06-12 20:50:42,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 20:50:42,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 6561 transitions. [2021-06-12 20:50:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:42,462 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:42,462 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:42,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 20:50:42,663 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -551491705, now seen corresponding path program 140 times [2021-06-12 20:50:42,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:42,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651770577] [2021-06-12 20:50:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:42,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:42,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651770577] [2021-06-12 20:50:42,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651770577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:42,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491218606] [2021-06-12 20:50:42,907 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 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 20:50:42,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:42,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:42,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:42,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:43,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:43,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:43,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:43,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:43,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:43,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:43,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:43,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491218606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:43,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:43,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-06-12 20:50:43,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81388282] [2021-06-12 20:50:43,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:50:43,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:43,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:50:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:50:43,372 INFO L87 Difference]: Start difference. First operand 3326 states and 6561 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 20:50:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:43,710 INFO L93 Difference]: Finished difference Result 4391 states and 8752 transitions. [2021-06-12 20:50:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 36 [2021-06-12 20:50:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:43,714 INFO L225 Difference]: With dead ends: 4391 [2021-06-12 20:50:43,714 INFO L226 Difference]: Without dead ends: 4338 [2021-06-12 20:50:43,715 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 575.5ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-12 20:50:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3344. [2021-06-12 20:50:43,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.9736763386180078) internal successors, (6598), 3343 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 6598 transitions. [2021-06-12 20:50:43,749 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 6598 transitions. Word has length 36 [2021-06-12 20:50:43,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:43,749 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 6598 transitions. [2021-06-12 20:50:43,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 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 20:50:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 6598 transitions. [2021-06-12 20:50:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:43,751 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:43,751 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:43,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 20:50:43,951 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 300524031, now seen corresponding path program 141 times [2021-06-12 20:50:43,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:43,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007251932] [2021-06-12 20:50:43,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:44,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:44,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007251932] [2021-06-12 20:50:44,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007251932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:44,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116688941] [2021-06-12 20:50:44,266 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 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 20:50:44,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:50:44,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:44,304 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-12 20:50:44,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:44,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:44,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:44,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 37 [2021-06-12 20:50:44,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:44,916 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-06-12 20:50:44,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:44,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:10 [2021-06-12 20:50:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:44,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116688941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:44,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:44,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-06-12 20:50:44,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944904122] [2021-06-12 20:50:44,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:44,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:44,930 INFO L87 Difference]: Start difference. First operand 3344 states and 6598 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:46,096 INFO L93 Difference]: Finished difference Result 4634 states and 9234 transitions. [2021-06-12 20:50:46,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-12 20:50:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:46,100 INFO L225 Difference]: With dead ends: 4634 [2021-06-12 20:50:46,100 INFO L226 Difference]: Without dead ends: 4520 [2021-06-12 20:50:46,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1205.8ms TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 20:50:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2021-06-12 20:50:46,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3368. [2021-06-12 20:50:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 1.9747549747549749) internal successors, (6649), 3367 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:46,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 6649 transitions. [2021-06-12 20:50:46,142 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 6649 transitions. Word has length 36 [2021-06-12 20:50:46,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:46,142 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 6649 transitions. [2021-06-12 20:50:46,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:46,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 6649 transitions. [2021-06-12 20:50:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:46,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:46,144 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:46,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-12 20:50:46,345 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:46,345 INFO L82 PathProgramCache]: Analyzing trace with hash 770045921, now seen corresponding path program 142 times [2021-06-12 20:50:46,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:46,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109886564] [2021-06-12 20:50:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:46,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:46,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109886564] [2021-06-12 20:50:46,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109886564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:46,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170704027] [2021-06-12 20:50:46,617 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 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 20:50:46,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:46,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:46,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:47,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:47,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:47,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:47,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:47,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:47,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:47,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170704027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:47,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:47,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-12 20:50:47,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822921728] [2021-06-12 20:50:47,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:50:47,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:47,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:50:47,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:47,075 INFO L87 Difference]: Start difference. First operand 3368 states and 6649 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 20:50:47,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:47,428 INFO L93 Difference]: Finished difference Result 4433 states and 8859 transitions. [2021-06-12 20:50:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:47,428 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 36 [2021-06-12 20:50:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:47,431 INFO L225 Difference]: With dead ends: 4433 [2021-06-12 20:50:47,432 INFO L226 Difference]: Without dead ends: 4374 [2021-06-12 20:50:47,432 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 596.0ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2021-06-12 20:50:47,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 3356. [2021-06-12 20:50:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-06-12 20:50:47,462 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-06-12 20:50:47,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:47,462 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-06-12 20:50:47,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 20:50:47,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-06-12 20:50:47,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:47,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:47,464 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:47,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 20:50:47,665 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:47,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:47,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1772986059, now seen corresponding path program 143 times [2021-06-12 20:50:47,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:47,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752602295] [2021-06-12 20:50:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:47,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:47,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752602295] [2021-06-12 20:50:47,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752602295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:47,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123945515] [2021-06-12 20:50:47,951 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 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 20:50:47,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 20:50:47,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:47,978 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:47,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:48,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:48,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:48,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:48,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:48,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:48,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:48,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123945515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:48,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:48,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-06-12 20:50:48,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540891157] [2021-06-12 20:50:48,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:50:48,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:48,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:50:48,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:48,414 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 20:50:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:48,791 INFO L93 Difference]: Finished difference Result 4113 states and 8183 transitions. [2021-06-12 20:50:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 20:50:48,792 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 36 [2021-06-12 20:50:48,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:48,795 INFO L225 Difference]: With dead ends: 4113 [2021-06-12 20:50:48,796 INFO L226 Difference]: Without dead ends: 4089 [2021-06-12 20:50:48,796 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 610.3ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-12 20:50:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-12 20:50:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3356. [2021-06-12 20:50:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-06-12 20:50:48,840 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-06-12 20:50:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:48,841 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-06-12 20:50:48,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 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 20:50:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-06-12 20:50:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:48,843 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:48,843 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:49,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:49,044 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1009016131, now seen corresponding path program 144 times [2021-06-12 20:50:49,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:49,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892844313] [2021-06-12 20:50:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:49,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:49,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892844313] [2021-06-12 20:50:49,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892844313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:49,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486503664] [2021-06-12 20:50:49,344 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 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 20:50:49,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:50:49,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:49,379 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:49,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:51,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:51,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 37 [2021-06-12 20:50:51,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:51,124 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-06-12 20:50:51,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:51,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-06-12 20:50:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:51,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486503664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:51,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:51,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-06-12 20:50:51,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486691408] [2021-06-12 20:50:51,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 20:50:51,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:51,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 20:50:51,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:51,135 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 20:50:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:54,664 INFO L93 Difference]: Finished difference Result 4097 states and 8147 transitions. [2021-06-12 20:50:54,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 20:50:54,665 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 36 [2021-06-12 20:50:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:54,668 INFO L225 Difference]: With dead ends: 4097 [2021-06-12 20:50:54,668 INFO L226 Difference]: Without dead ends: 4063 [2021-06-12 20:50:54,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 3167.9ms TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 20:50:54,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-12 20:50:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3353. [2021-06-12 20:50:54,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 1.974343675417661) internal successors, (6618), 3352 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 6618 transitions. [2021-06-12 20:50:54,698 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 6618 transitions. Word has length 36 [2021-06-12 20:50:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:54,698 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 6618 transitions. [2021-06-12 20:50:54,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 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 20:50:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 6618 transitions. [2021-06-12 20:50:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-12 20:50:54,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:54,700 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:54,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-12 20:50:54,901 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:54,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1533152851, now seen corresponding path program 145 times [2021-06-12 20:50:54,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:54,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617512347] [2021-06-12 20:50:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:55,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:55,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617512347] [2021-06-12 20:50:55,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617512347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:55,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818467837] [2021-06-12 20:50:55,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:50:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:55,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:55,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:55,533 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-06-12 20:50:55,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:55,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:55,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:55,546 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 20:50:55,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:10 [2021-06-12 20:50:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:55,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818467837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:55,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:55,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-06-12 20:50:55,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509926207] [2021-06-12 20:50:55,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 20:50:55,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:55,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 20:50:55,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-06-12 20:50:55,559 INFO L87 Difference]: Start difference. First operand 3353 states and 6618 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 20:50:56,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:56,125 INFO L93 Difference]: Finished difference Result 3920 states and 7778 transitions. [2021-06-12 20:50:56,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 20:50:56,125 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 36 [2021-06-12 20:50:56,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:56,128 INFO L225 Difference]: With dead ends: 3920 [2021-06-12 20:50:56,128 INFO L226 Difference]: Without dead ends: 3905 [2021-06-12 20:50:56,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 556.8ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-12 20:50:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-06-12 20:50:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3360. [2021-06-12 20:50:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 1.9746948496576362) internal successors, (6633), 3359 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 6633 transitions. [2021-06-12 20:50:56,158 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 6633 transitions. Word has length 36 [2021-06-12 20:50:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:56,158 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 6633 transitions. [2021-06-12 20:50:56,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 20:50:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 6633 transitions. [2021-06-12 20:50:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 20:50:56,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:56,160 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:56,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:56,361 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:56,361 INFO L82 PathProgramCache]: Analyzing trace with hash 297908302, now seen corresponding path program 146 times [2021-06-12 20:50:56,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:56,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110097813] [2021-06-12 20:50:56,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:56,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:56,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110097813] [2021-06-12 20:50:56,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110097813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:56,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23270520] [2021-06-12 20:50:56,396 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 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 20:50:56,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:50:56,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:56,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 20:50:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:56,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23270520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:56,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:56,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 20:50:56,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242047485] [2021-06-12 20:50:56,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 20:50:56,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:56,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 20:50:56,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:50:56,472 INFO L87 Difference]: Start difference. First operand 3360 states and 6633 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 20:50:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:56,503 INFO L93 Difference]: Finished difference Result 3841 states and 7613 transitions. [2021-06-12 20:50:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 20:50:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 38 [2021-06-12 20:50:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:56,506 INFO L225 Difference]: With dead ends: 3841 [2021-06-12 20:50:56,506 INFO L226 Difference]: Without dead ends: 3830 [2021-06-12 20:50:56,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-12 20:50:56,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-06-12 20:50:56,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3470. [2021-06-12 20:50:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 1.9824156817526666) internal successors, (6877), 3469 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 6877 transitions. [2021-06-12 20:50:56,535 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 6877 transitions. Word has length 38 [2021-06-12 20:50:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:56,536 INFO L482 AbstractCegarLoop]: Abstraction has 3470 states and 6877 transitions. [2021-06-12 20:50:56,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 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 20:50:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 6877 transitions. [2021-06-12 20:50:56,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:50:56,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:56,538 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:56,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:56,739 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1224230535, now seen corresponding path program 147 times [2021-06-12 20:50:56,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:56,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372108931] [2021-06-12 20:50:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:56,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:56,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372108931] [2021-06-12 20:50:56,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372108931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:56,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518605220] [2021-06-12 20:50:56,997 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 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 20:50:57,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:50:57,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:57,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:57,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:57,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:57,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:57,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:57,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:57,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:57,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:57,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518605220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:57,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:57,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-12 20:50:57,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040297066] [2021-06-12 20:50:57,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:50:57,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:57,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:50:57,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:57,492 INFO L87 Difference]: Start difference. First operand 3470 states and 6877 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:58,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:58,127 INFO L93 Difference]: Finished difference Result 4514 states and 9036 transitions. [2021-06-12 20:50:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:50:58,127 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:50:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:58,131 INFO L225 Difference]: With dead ends: 4514 [2021-06-12 20:50:58,131 INFO L226 Difference]: Without dead ends: 4469 [2021-06-12 20:50:58,131 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 798.8ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:50:58,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-12 20:50:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3509. [2021-06-12 20:50:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-06-12 20:50:58,164 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-06-12 20:50:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:58,164 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-06-12 20:50:58,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-06-12 20:50:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:50:58,166 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:58,167 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:58,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:58,367 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2076785471, now seen corresponding path program 148 times [2021-06-12 20:50:58,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:58,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734488597] [2021-06-12 20:50:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:50:58,606 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:58,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:50:58,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734488597] [2021-06-12 20:50:58,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734488597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:58,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339337357] [2021-06-12 20:50:58,606 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 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 20:50:58,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:50:58,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:50:58,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:50:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:50:59,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:59,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:50:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:50:59,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:50:59,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:50:59,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:50:59,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:50:59,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:50:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:50:59,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339337357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:50:59,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:50:59,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-12 20:50:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949685433] [2021-06-12 20:50:59,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:50:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:50:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:50:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:50:59,091 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:50:59,579 INFO L93 Difference]: Finished difference Result 4780 states and 9544 transitions. [2021-06-12 20:50:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:50:59,579 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:50:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:50:59,583 INFO L225 Difference]: With dead ends: 4780 [2021-06-12 20:50:59,583 INFO L226 Difference]: Without dead ends: 4735 [2021-06-12 20:50:59,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 796.4ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 20:50:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-06-12 20:50:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 3509. [2021-06-12 20:50:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-06-12 20:50:59,617 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-06-12 20:50:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:50:59,617 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-06-12 20:50:59,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:50:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-06-12 20:50:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:50:59,620 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:50:59,620 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:50:59,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:50:59,820 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:50:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:50:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash 101428265, now seen corresponding path program 149 times [2021-06-12 20:50:59,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:50:59,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643744831] [2021-06-12 20:50:59,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:50:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:00,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:00,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643744831] [2021-06-12 20:51:00,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643744831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:00,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684295806] [2021-06-12 20:51:00,071 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 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 20:51:00,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:51:00,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:00,098 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:51:00,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:00,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:00,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:00,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:00,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:00,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:00,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-06-12 20:51:00,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:00,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:00,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:00,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-06-12 20:51:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:00,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684295806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:00,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:00,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-06-12 20:51:00,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863114553] [2021-06-12 20:51:00,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-12 20:51:00,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:00,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-12 20:51:00,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 20:51:00,669 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:01,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:01,784 INFO L93 Difference]: Finished difference Result 4916 states and 9863 transitions. [2021-06-12 20:51:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:51:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:51:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:01,789 INFO L225 Difference]: With dead ends: 4916 [2021-06-12 20:51:01,789 INFO L226 Difference]: Without dead ends: 4871 [2021-06-12 20:51:01,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1167.9ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:51:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-12 20:51:01,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3533. [2021-06-12 20:51:01,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 1.9818799546998866) internal successors, (7000), 3532 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 7000 transitions. [2021-06-12 20:51:01,824 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 7000 transitions. Word has length 39 [2021-06-12 20:51:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:01,824 INFO L482 AbstractCegarLoop]: Abstraction has 3533 states and 7000 transitions. [2021-06-12 20:51:01,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 7000 transitions. [2021-06-12 20:51:01,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:51:01,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:01,826 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:02,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:02,027 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:02,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1574344523, now seen corresponding path program 150 times [2021-06-12 20:51:02,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:02,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910342091] [2021-06-12 20:51:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:02,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910342091] [2021-06-12 20:51:02,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910342091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:02,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779551002] [2021-06-12 20:51:02,277 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 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 20:51:02,304 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 20:51:02,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:02,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:51:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:02,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:02,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:02,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:51:02,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:02,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:02,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:02,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:51:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:02,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779551002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:02,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:02,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-12 20:51:02,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306421561] [2021-06-12 20:51:02,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:51:02,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:02,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:51:02,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:51:02,756 INFO L87 Difference]: Start difference. First operand 3533 states and 7000 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:03,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:03,643 INFO L93 Difference]: Finished difference Result 5103 states and 10179 transitions. [2021-06-12 20:51:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:51:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:51:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:03,646 INFO L225 Difference]: With dead ends: 5103 [2021-06-12 20:51:03,647 INFO L226 Difference]: Without dead ends: 4891 [2021-06-12 20:51:03,647 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 859.7ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:51:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-06-12 20:51:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3611. [2021-06-12 20:51:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 1.9817174515235456) internal successors, (7154), 3610 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 7154 transitions. [2021-06-12 20:51:03,682 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 7154 transitions. Word has length 39 [2021-06-12 20:51:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:03,682 INFO L482 AbstractCegarLoop]: Abstraction has 3611 states and 7154 transitions. [2021-06-12 20:51:03,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 7154 transitions. [2021-06-12 20:51:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:51:03,685 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:03,685 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:03,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-12 20:51:03,885 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash 935790731, now seen corresponding path program 151 times [2021-06-12 20:51:03,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:03,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055717556] [2021-06-12 20:51:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:04,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:04,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055717556] [2021-06-12 20:51:04,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055717556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:04,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043258756] [2021-06-12 20:51:04,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:51:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:04,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:51:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:04,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:04,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:04,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:51:04,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:04,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:04,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:04,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:51:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:04,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043258756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:04,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:04,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-12 20:51:04,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127028655] [2021-06-12 20:51:04,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:51:04,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:04,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:51:04,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:51:04,602 INFO L87 Difference]: Start difference. First operand 3611 states and 7154 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:05,505 INFO L93 Difference]: Finished difference Result 4917 states and 9849 transitions. [2021-06-12 20:51:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 20:51:05,505 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:51:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:05,510 INFO L225 Difference]: With dead ends: 4917 [2021-06-12 20:51:05,510 INFO L226 Difference]: Without dead ends: 4872 [2021-06-12 20:51:05,510 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 910.9ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-06-12 20:51:05,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3671. [2021-06-12 20:51:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.98283378746594) internal successors, (7277), 3670 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7277 transitions. [2021-06-12 20:51:05,548 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7277 transitions. Word has length 39 [2021-06-12 20:51:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:05,548 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7277 transitions. [2021-06-12 20:51:05,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7277 transitions. [2021-06-12 20:51:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-12 20:51:05,551 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:05,551 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:05,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:05,752 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash 616889269, now seen corresponding path program 152 times [2021-06-12 20:51:05,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:05,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355330216] [2021-06-12 20:51:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:05,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:05,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355330216] [2021-06-12 20:51:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355330216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590685117] [2021-06-12 20:51:05,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:51:06,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:51:06,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:06,014 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 20:51:06,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:06,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:06,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:06,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:06,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-06-12 20:51:06,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:06,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:06,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:06,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-06-12 20:51:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 20:51:06,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590685117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:06,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:06,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-06-12 20:51:06,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312295216] [2021-06-12 20:51:06,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 20:51:06,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:06,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 20:51:06,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 20:51:06,466 INFO L87 Difference]: Start difference. First operand 3671 states and 7277 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:07,327 INFO L93 Difference]: Finished difference Result 5037 states and 10091 transitions. [2021-06-12 20:51:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 20:51:07,327 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-12 20:51:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:07,332 INFO L225 Difference]: With dead ends: 5037 [2021-06-12 20:51:07,332 INFO L226 Difference]: Without dead ends: 4992 [2021-06-12 20:51:07,332 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 861.4ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:51:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-06-12 20:51:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 3698. [2021-06-12 20:51:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3697 states have (on average 1.9829591560724913) internal successors, (7331), 3697 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:07,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 7331 transitions. [2021-06-12 20:51:07,373 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 7331 transitions. Word has length 39 [2021-06-12 20:51:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:07,373 INFO L482 AbstractCegarLoop]: Abstraction has 3698 states and 7331 transitions. [2021-06-12 20:51:07,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 7331 transitions. [2021-06-12 20:51:07,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:07,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:07,376 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:07,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-12 20:51:07,577 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:07,577 INFO L82 PathProgramCache]: Analyzing trace with hash 490317244, now seen corresponding path program 153 times [2021-06-12 20:51:07,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:07,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090632915] [2021-06-12 20:51:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 20:51:07,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:07,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090632915] [2021-06-12 20:51:07,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090632915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:07,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053247834] [2021-06-12 20:51:07,878 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 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 20:51:07,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 20:51:07,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:07,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-12 20:51:07,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:08,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:08,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:08,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:08,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:09,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:09,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:09,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 44 [2021-06-12 20:51:09,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:09,027 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.9 percent of original size [2021-06-12 20:51:09,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:09,030 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:123, output treesize:12 [2021-06-12 20:51:09,039 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:09,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053247834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:09,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:09,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-06-12 20:51:09,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765482023] [2021-06-12 20:51:09,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 20:51:09,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:09,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 20:51:09,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 20:51:09,040 INFO L87 Difference]: Start difference. First operand 3698 states and 7331 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:11,589 INFO L93 Difference]: Finished difference Result 6069 states and 12152 transitions. [2021-06-12 20:51:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 20:51:11,589 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:11,594 INFO L225 Difference]: With dead ends: 6069 [2021-06-12 20:51:11,594 INFO L226 Difference]: Without dead ends: 6002 [2021-06-12 20:51:11,595 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1269.7ms TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:51:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-06-12 20:51:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 3716. [2021-06-12 20:51:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-06-12 20:51:11,635 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-06-12 20:51:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:11,635 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-06-12 20:51:11,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-06-12 20:51:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:11,638 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:11,638 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:11,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-12 20:51:11,838 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash -543142796, now seen corresponding path program 154 times [2021-06-12 20:51:11,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:11,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034221774] [2021-06-12 20:51:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:11,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:12,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:12,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034221774] [2021-06-12 20:51:12,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034221774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:12,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335807408] [2021-06-12 20:51:12,139 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 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 20:51:12,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:51:12,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:12,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:12,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:12,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:12,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:12,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:12,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:12,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:12,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:12,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:12,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:12,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:12,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:12,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335807408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:12,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:12,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-12 20:51:12,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577907914] [2021-06-12 20:51:12,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 20:51:12,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:12,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 20:51:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:51:12,907 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:13,659 INFO L93 Difference]: Finished difference Result 6664 states and 13360 transitions. [2021-06-12 20:51:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 20:51:13,659 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:13,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:13,665 INFO L225 Difference]: With dead ends: 6664 [2021-06-12 20:51:13,665 INFO L226 Difference]: Without dead ends: 6597 [2021-06-12 20:51:13,665 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1001.0ms TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 20:51:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2021-06-12 20:51:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 3716. [2021-06-12 20:51:13,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:13,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-06-12 20:51:13,709 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-06-12 20:51:13,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:13,709 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-06-12 20:51:13,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:13,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-06-12 20:51:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:13,711 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:13,711 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:13,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-12 20:51:13,912 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:13,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1543593212, now seen corresponding path program 155 times [2021-06-12 20:51:13,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:13,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541025538] [2021-06-12 20:51:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:13,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:14,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:14,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541025538] [2021-06-12 20:51:14,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541025538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:14,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865720656] [2021-06-12 20:51:14,241 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 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 20:51:14,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 20:51:14,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:14,270 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:14,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:14,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:14,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:14,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:14,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:14,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:14,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:14,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:15,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865720656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:15,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:15,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:15,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022852063] [2021-06-12 20:51:15,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:15,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:15,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:15,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:15,007 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:15,783 INFO L93 Difference]: Finished difference Result 7025 states and 14072 transitions. [2021-06-12 20:51:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:51:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:15,789 INFO L225 Difference]: With dead ends: 7025 [2021-06-12 20:51:15,789 INFO L226 Difference]: Without dead ends: 6922 [2021-06-12 20:51:15,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1055.4ms TimeCoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:51:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2021-06-12 20:51:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 3857. [2021-06-12 20:51:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 1.97899377593361) internal successors, (7631), 3856 states have internal predecessors, (7631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 7631 transitions. [2021-06-12 20:51:15,836 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 7631 transitions. Word has length 41 [2021-06-12 20:51:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:15,836 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 7631 transitions. [2021-06-12 20:51:15,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:15,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 7631 transitions. [2021-06-12 20:51:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:15,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:15,857 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:16,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:16,065 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash -13013580, now seen corresponding path program 156 times [2021-06-12 20:51:16,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:16,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888650074] [2021-06-12 20:51:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:16,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:16,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888650074] [2021-06-12 20:51:16,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888650074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:16,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003244938] [2021-06-12 20:51:16,450 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 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 20:51:16,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 20:51:16,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:16,489 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:17,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:17,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:17,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:17,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:17,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:17,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:17,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:17,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:17,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003244938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:17,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:17,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:17,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470590183] [2021-06-12 20:51:17,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:17,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:17,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:17,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:17,287 INFO L87 Difference]: Start difference. First operand 3857 states and 7631 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:18,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:18,096 INFO L93 Difference]: Finished difference Result 5973 states and 11891 transitions. [2021-06-12 20:51:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:51:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:18,101 INFO L225 Difference]: With dead ends: 5973 [2021-06-12 20:51:18,101 INFO L226 Difference]: Without dead ends: 5944 [2021-06-12 20:51:18,102 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1151.6ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:51:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-06-12 20:51:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 3896. [2021-06-12 20:51:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3895 states have (on average 1.9802310654685493) internal successors, (7713), 3895 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 7713 transitions. [2021-06-12 20:51:18,147 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 7713 transitions. Word has length 41 [2021-06-12 20:51:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:18,147 INFO L482 AbstractCegarLoop]: Abstraction has 3896 states and 7713 transitions. [2021-06-12 20:51:18,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 7713 transitions. [2021-06-12 20:51:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:18,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:18,151 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:18,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-12 20:51:18,351 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -862044258, now seen corresponding path program 157 times [2021-06-12 20:51:18,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:18,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013456537] [2021-06-12 20:51:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:18,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013456537] [2021-06-12 20:51:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013456537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636915419] [2021-06-12 20:51:18,776 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 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 20:51:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:18,814 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:18,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:19,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:19,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:19,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:19,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:19,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:19,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:19,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:19,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:19,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:19,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:19,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636915419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:19,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:19,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-12 20:51:19,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232749347] [2021-06-12 20:51:19,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 20:51:19,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:19,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 20:51:19,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:51:19,575 INFO L87 Difference]: Start difference. First operand 3896 states and 7713 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:20,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:20,224 INFO L93 Difference]: Finished difference Result 6364 states and 12786 transitions. [2021-06-12 20:51:20,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:51:20,224 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:20,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:20,230 INFO L225 Difference]: With dead ends: 6364 [2021-06-12 20:51:20,230 INFO L226 Difference]: Without dead ends: 6297 [2021-06-12 20:51:20,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1159.5ms TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:51:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6297 states. [2021-06-12 20:51:20,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6297 to 3182. [2021-06-12 20:51:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 1.994970135177617) internal successors, (6346), 3181 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 6346 transitions. [2021-06-12 20:51:20,269 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 6346 transitions. Word has length 41 [2021-06-12 20:51:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:20,269 INFO L482 AbstractCegarLoop]: Abstraction has 3182 states and 6346 transitions. [2021-06-12 20:51:20,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 6346 transitions. [2021-06-12 20:51:20,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:20,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:20,271 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:20,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:20,471 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:20,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1224691750, now seen corresponding path program 158 times [2021-06-12 20:51:20,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:20,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327990520] [2021-06-12 20:51:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:20,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:20,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327990520] [2021-06-12 20:51:20,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327990520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:20,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093915967] [2021-06-12 20:51:20,816 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 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 20:51:20,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:51:20,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:20,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:20,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:21,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:21,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:21,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:21,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:21,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:21,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:21,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:21,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:21,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:21,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:21,723 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:21,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093915967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:21,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:21,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:21,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83413114] [2021-06-12 20:51:21,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:21,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:21,724 INFO L87 Difference]: Start difference. First operand 3182 states and 6346 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:22,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:22,733 INFO L93 Difference]: Finished difference Result 5735 states and 11591 transitions. [2021-06-12 20:51:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:51:22,734 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:22,754 INFO L225 Difference]: With dead ends: 5735 [2021-06-12 20:51:22,754 INFO L226 Difference]: Without dead ends: 5632 [2021-06-12 20:51:22,754 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1217.2ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-06-12 20:51:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2021-06-12 20:51:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 2936. [2021-06-12 20:51:22,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 2.005792163543441) internal successors, (5887), 2935 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 5887 transitions. [2021-06-12 20:51:22,792 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 5887 transitions. Word has length 41 [2021-06-12 20:51:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:22,792 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 5887 transitions. [2021-06-12 20:51:22,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 5887 transitions. [2021-06-12 20:51:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:22,794 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:22,794 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:22,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:22,995 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash -331915042, now seen corresponding path program 159 times [2021-06-12 20:51:22,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:22,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074950910] [2021-06-12 20:51:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:23,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074950910] [2021-06-12 20:51:23,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074950910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425560459] [2021-06-12 20:51:23,330 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 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 20:51:23,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:51:23,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:23,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-12 20:51:23,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:24,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:24,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:24,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:24,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:24,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:24,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:24,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 44 [2021-06-12 20:51:24,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:24,256 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-12 20:51:24,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:24,257 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:12 [2021-06-12 20:51:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:24,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425560459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:24,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:24,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:24,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275849815] [2021-06-12 20:51:24,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:24,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:24,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:24,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:24,266 INFO L87 Difference]: Start difference. First operand 2936 states and 5887 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:26,759 INFO L93 Difference]: Finished difference Result 5251 states and 10563 transitions. [2021-06-12 20:51:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 20:51:26,760 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:26,764 INFO L225 Difference]: With dead ends: 5251 [2021-06-12 20:51:26,764 INFO L226 Difference]: Without dead ends: 5054 [2021-06-12 20:51:26,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2234.8ms TimeCoverageRelationStatistics Valid=269, Invalid=3763, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 20:51:26,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-06-12 20:51:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 3113. [2021-06-12 20:51:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 1.9983933161953729) internal successors, (6219), 3112 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 6219 transitions. [2021-06-12 20:51:26,801 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 6219 transitions. Word has length 41 [2021-06-12 20:51:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:26,801 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 6219 transitions. [2021-06-12 20:51:26,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 6219 transitions. [2021-06-12 20:51:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:26,804 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:26,804 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:27,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:27,004 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:27,005 INFO L82 PathProgramCache]: Analyzing trace with hash 199723986, now seen corresponding path program 160 times [2021-06-12 20:51:27,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:27,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284505200] [2021-06-12 20:51:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:27,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:27,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284505200] [2021-06-12 20:51:27,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284505200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:27,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986411793] [2021-06-12 20:51:27,333 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 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 20:51:27,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:51:27,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:27,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:28,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:28,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:28,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:28,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:28,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:28,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:28,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:28,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:28,081 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:28,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986411793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:28,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:28,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-12 20:51:28,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617418898] [2021-06-12 20:51:28,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 20:51:28,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:28,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 20:51:28,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:51:28,082 INFO L87 Difference]: Start difference. First operand 3113 states and 6219 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:28,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:28,843 INFO L93 Difference]: Finished difference Result 5901 states and 11893 transitions. [2021-06-12 20:51:28,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:51:28,843 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:28,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:28,848 INFO L225 Difference]: With dead ends: 5901 [2021-06-12 20:51:28,848 INFO L226 Difference]: Without dead ends: 5804 [2021-06-12 20:51:28,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1027.9ms TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 20:51:28,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-06-12 20:51:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 3365. [2021-06-12 20:51:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 1.9913793103448276) internal successors, (6699), 3364 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 6699 transitions. [2021-06-12 20:51:28,887 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 6699 transitions. Word has length 41 [2021-06-12 20:51:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:28,887 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 6699 transitions. [2021-06-12 20:51:28,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 6699 transitions. [2021-06-12 20:51:28,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:28,890 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:28,890 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:29,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:29,090 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash -273135364, now seen corresponding path program 161 times [2021-06-12 20:51:29,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:29,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495793870] [2021-06-12 20:51:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:29,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:29,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495793870] [2021-06-12 20:51:29,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495793870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:29,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742565711] [2021-06-12 20:51:29,452 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 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 20:51:29,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:51:29,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:29,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:32,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:32,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:32,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:32,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 36 [2021-06-12 20:51:32,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:32,895 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-06-12 20:51:32,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:32,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:99, output treesize:9 [2021-06-12 20:51:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:32,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742565711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:32,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:32,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-06-12 20:51:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445506881] [2021-06-12 20:51:32,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-12 20:51:32,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:32,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-12 20:51:32,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 20:51:32,921 INFO L87 Difference]: Start difference. First operand 3365 states and 6699 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:36,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:36,968 INFO L93 Difference]: Finished difference Result 6066 states and 12161 transitions. [2021-06-12 20:51:36,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:51:36,969 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:36,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:36,974 INFO L225 Difference]: With dead ends: 6066 [2021-06-12 20:51:36,974 INFO L226 Difference]: Without dead ends: 5834 [2021-06-12 20:51:36,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 4675.0ms TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 20:51:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-06-12 20:51:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 3467. [2021-06-12 20:51:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:37,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-06-12 20:51:37,012 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-06-12 20:51:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:37,012 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-06-12 20:51:37,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:37,013 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-06-12 20:51:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:37,015 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:37,015 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:37,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-12 20:51:37,216 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1829742156, now seen corresponding path program 162 times [2021-06-12 20:51:37,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:37,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432913838] [2021-06-12 20:51:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:37,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432913838] [2021-06-12 20:51:37,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432913838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:37,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045015527] [2021-06-12 20:51:37,553 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 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 20:51:37,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:51:37,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:37,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:38,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:38,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:38,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:38,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:38,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:38,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:38,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:38,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:38,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045015527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:38,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:38,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:38,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976388314] [2021-06-12 20:51:38,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:38,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:38,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:38,433 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:39,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:39,593 INFO L93 Difference]: Finished difference Result 5352 states and 10712 transitions. [2021-06-12 20:51:39,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:51:39,594 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:39,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:39,599 INFO L225 Difference]: With dead ends: 5352 [2021-06-12 20:51:39,599 INFO L226 Difference]: Without dead ends: 5323 [2021-06-12 20:51:39,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1173.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:51:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2021-06-12 20:51:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 3467. [2021-06-12 20:51:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:39,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-06-12 20:51:39,647 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-06-12 20:51:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:39,647 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-06-12 20:51:39,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-06-12 20:51:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:39,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:39,650 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:39,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-12 20:51:39,851 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:39,851 INFO L82 PathProgramCache]: Analyzing trace with hash -981044130, now seen corresponding path program 163 times [2021-06-12 20:51:39,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:39,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785851208] [2021-06-12 20:51:39,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:40,187 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:40,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:40,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785851208] [2021-06-12 20:51:40,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785851208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:40,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442021841] [2021-06-12 20:51:40,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:51:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:40,214 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:40,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:40,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:40,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:40,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:40,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:40,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:40,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:40,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:40,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:40,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:40,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442021841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:40,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:40,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:40,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243152331] [2021-06-12 20:51:40,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:40,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:40,973 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:41,896 INFO L93 Difference]: Finished difference Result 5320 states and 10648 transitions. [2021-06-12 20:51:41,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:51:41,897 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:41,901 INFO L225 Difference]: With dead ends: 5320 [2021-06-12 20:51:41,901 INFO L226 Difference]: Without dead ends: 5289 [2021-06-12 20:51:41,901 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1103.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:51:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2021-06-12 20:51:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 3506. [2021-06-12 20:51:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.9905848787446505) internal successors, (6977), 3505 states have internal predecessors, (6977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 6977 transitions. [2021-06-12 20:51:41,938 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 6977 transitions. Word has length 41 [2021-06-12 20:51:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:41,938 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 6977 transitions. [2021-06-12 20:51:41,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 6977 transitions. [2021-06-12 20:51:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:41,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:41,941 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:42,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:42,145 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:42,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1879697322, now seen corresponding path program 164 times [2021-06-12 20:51:42,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:42,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389710148] [2021-06-12 20:51:42,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:42,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:42,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389710148] [2021-06-12 20:51:42,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389710148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:42,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689132016] [2021-06-12 20:51:42,467 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 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 20:51:42,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:51:42,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:42,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:43,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:43,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:43,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:43,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:43,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:43,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:43,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:43,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689132016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:43,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:43,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-06-12 20:51:43,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068395301] [2021-06-12 20:51:43,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-12 20:51:43,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:43,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-12 20:51:43,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 20:51:43,214 INFO L87 Difference]: Start difference. First operand 3506 states and 6977 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:44,159 INFO L93 Difference]: Finished difference Result 6035 states and 12259 transitions. [2021-06-12 20:51:44,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 20:51:44,159 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:44,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:44,164 INFO L225 Difference]: With dead ends: 6035 [2021-06-12 20:51:44,164 INFO L226 Difference]: Without dead ends: 5929 [2021-06-12 20:51:44,165 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1049.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:51:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2021-06-12 20:51:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 3122. [2021-06-12 20:51:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 1.993912207625761) internal successors, (6223), 3121 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 6223 transitions. [2021-06-12 20:51:44,204 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 6223 transitions. Word has length 41 [2021-06-12 20:51:44,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:44,204 INFO L482 AbstractCegarLoop]: Abstraction has 3122 states and 6223 transitions. [2021-06-12 20:51:44,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 6223 transitions. [2021-06-12 20:51:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:44,206 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:44,206 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:44,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-12 20:51:44,407 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:44,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash 207038686, now seen corresponding path program 165 times [2021-06-12 20:51:44,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:44,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745937728] [2021-06-12 20:51:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:44,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:44,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745937728] [2021-06-12 20:51:44,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745937728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:44,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979482335] [2021-06-12 20:51:44,759 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 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 20:51:44,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 20:51:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:44,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:45,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:45,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:45,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:45,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:45,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:45,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:45,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:45,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:45,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:45,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:45,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:45,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979482335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:45,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:45,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:45,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220991989] [2021-06-12 20:51:45,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:45,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:45,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:45,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:45,527 INFO L87 Difference]: Start difference. First operand 3122 states and 6223 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:46,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:46,303 INFO L93 Difference]: Finished difference Result 5436 states and 11008 transitions. [2021-06-12 20:51:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:51:46,303 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:46,308 INFO L225 Difference]: With dead ends: 5436 [2021-06-12 20:51:46,308 INFO L226 Difference]: Without dead ends: 5333 [2021-06-12 20:51:46,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1130.3ms TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:51:46,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5333 states. [2021-06-12 20:51:46,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5333 to 2879. [2021-06-12 20:51:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:46,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-06-12 20:51:46,344 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-06-12 20:51:46,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:46,344 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-06-12 20:51:46,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:46,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-06-12 20:51:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:46,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:46,346 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:46,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:46,547 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1349568106, now seen corresponding path program 166 times [2021-06-12 20:51:46,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:46,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688717269] [2021-06-12 20:51:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:46,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688717269] [2021-06-12 20:51:46,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688717269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033741731] [2021-06-12 20:51:46,894 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 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 20:51:46,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 20:51:46,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:46,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:46,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:47,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:47,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:47,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:47,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:47,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:47,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:47,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:47,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:47,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:47,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033741731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:47,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:47,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:47,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663621918] [2021-06-12 20:51:47,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:47,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:47,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:47,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:47,778 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:48,702 INFO L93 Difference]: Finished difference Result 4690 states and 9451 transitions. [2021-06-12 20:51:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 20:51:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:48,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:48,707 INFO L225 Difference]: With dead ends: 4690 [2021-06-12 20:51:48,707 INFO L226 Difference]: Without dead ends: 4661 [2021-06-12 20:51:48,707 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1235.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:51:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-12 20:51:48,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2879. [2021-06-12 20:51:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-06-12 20:51:48,736 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-06-12 20:51:48,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:48,736 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-06-12 20:51:48,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:48,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-06-12 20:51:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:48,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:48,738 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:48,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 20:51:48,939 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:48,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:48,939 INFO L82 PathProgramCache]: Analyzing trace with hash 301499944, now seen corresponding path program 167 times [2021-06-12 20:51:48,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:48,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93987123] [2021-06-12 20:51:48,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:49,343 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:49,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:49,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93987123] [2021-06-12 20:51:49,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93987123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:49,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513396610] [2021-06-12 20:51:49,343 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 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 20:51:49,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 20:51:49,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:49,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:49,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:50,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:50,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:50,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:50,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:50,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:50,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 36 [2021-06-12 20:51:50,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:50,177 INFO L628 ElimStorePlain]: treesize reduction 5, result has 82.8 percent of original size [2021-06-12 20:51:50,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:50,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:98, output treesize:9 [2021-06-12 20:51:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:50,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513396610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:50,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:50,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-06-12 20:51:50,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816125136] [2021-06-12 20:51:50,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-12 20:51:50,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-12 20:51:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 20:51:50,202 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:51,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:51,320 INFO L93 Difference]: Finished difference Result 5671 states and 11398 transitions. [2021-06-12 20:51:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 20:51:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:51,325 INFO L225 Difference]: With dead ends: 5671 [2021-06-12 20:51:51,325 INFO L226 Difference]: Without dead ends: 5413 [2021-06-12 20:51:51,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1336.3ms TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 20:51:51,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-06-12 20:51:51,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 3262. [2021-06-12 20:51:51,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 1.9908003679852806) internal successors, (6492), 3261 states have internal predecessors, (6492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:51,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 6492 transitions. [2021-06-12 20:51:51,361 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 6492 transitions. Word has length 41 [2021-06-12 20:51:51,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:51,361 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 6492 transitions. [2021-06-12 20:51:51,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 6492 transitions. [2021-06-12 20:51:51,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:51,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:51,363 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:51,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:51,563 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:51,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1290788428, now seen corresponding path program 168 times [2021-06-12 20:51:51,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:51,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111184679] [2021-06-12 20:51:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:51,905 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:51,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:51,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111184679] [2021-06-12 20:51:51,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111184679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:51,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312303445] [2021-06-12 20:51:51,906 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 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 20:51:51,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 20:51:51,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:51,934 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:51,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:52,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:52,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:52,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:52,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:52,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:52,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:52,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:52,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:52,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312303445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:52,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:52,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:52,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282522228] [2021-06-12 20:51:52,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:52,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:52,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:52,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:52,687 INFO L87 Difference]: Start difference. First operand 3262 states and 6492 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:53,311 INFO L93 Difference]: Finished difference Result 6007 states and 12122 transitions. [2021-06-12 20:51:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 20:51:53,312 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:53,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:53,316 INFO L225 Difference]: With dead ends: 6007 [2021-06-12 20:51:53,316 INFO L226 Difference]: Without dead ends: 5784 [2021-06-12 20:51:53,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1134.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 20:51:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5784 states. [2021-06-12 20:51:53,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 2866. [2021-06-12 20:51:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 1.9720767888307156) internal successors, (5650), 2865 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 5650 transitions. [2021-06-12 20:51:53,350 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 5650 transitions. Word has length 41 [2021-06-12 20:51:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:53,350 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 5650 transitions. [2021-06-12 20:51:53,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 5650 transitions. [2021-06-12 20:51:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:53,352 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:53,352 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:53,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:53,553 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:53,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:53,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1447572076, now seen corresponding path program 169 times [2021-06-12 20:51:53,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:53,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953542545] [2021-06-12 20:51:53,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:53,896 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:53,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:53,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953542545] [2021-06-12 20:51:53,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953542545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:53,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387346507] [2021-06-12 20:51:53,896 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 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 20:51:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:53,922 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:53,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:54,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:54,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:54,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:54,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:54,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:54,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:54,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:54,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:54,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:54,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387346507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:54,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:54,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:54,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428013219] [2021-06-12 20:51:54,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:54,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:54,675 INFO L87 Difference]: Start difference. First operand 2866 states and 5650 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:55,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:55,428 INFO L93 Difference]: Finished difference Result 4555 states and 9072 transitions. [2021-06-12 20:51:55,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:51:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:55,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:55,432 INFO L225 Difference]: With dead ends: 4555 [2021-06-12 20:51:55,432 INFO L226 Difference]: Without dead ends: 4532 [2021-06-12 20:51:55,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1109.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:51:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-06-12 20:51:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 2872. [2021-06-12 20:51:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-06-12 20:51:55,461 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-06-12 20:51:55,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:55,461 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-06-12 20:51:55,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-06-12 20:51:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:55,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:55,463 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:55,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:55,663 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:55,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:55,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1998697194, now seen corresponding path program 170 times [2021-06-12 20:51:55,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:55,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392689781] [2021-06-12 20:51:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:56,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:56,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392689781] [2021-06-12 20:51:56,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392689781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:56,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193242469] [2021-06-12 20:51:56,022 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 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 20:51:56,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 20:51:56,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:56,048 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-12 20:51:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:51:56,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:56,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:56,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:56,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:51:56,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:51:56,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-06-12 20:51:56,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:51:56,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 20:51:56,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:51:56,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-06-12 20:51:56,787 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:51:56,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193242469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:56,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:51:56,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-06-12 20:51:56,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496789953] [2021-06-12 20:51:56,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 20:51:56,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:51:56,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 20:51:56,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 20:51:56,788 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 20:51:57,592 INFO L93 Difference]: Finished difference Result 4567 states and 9099 transitions. [2021-06-12 20:51:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 20:51:57,593 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-12 20:51:57,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 20:51:57,596 INFO L225 Difference]: With dead ends: 4567 [2021-06-12 20:51:57,596 INFO L226 Difference]: Without dead ends: 4543 [2021-06-12 20:51:57,597 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1103.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 20:51:57,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-06-12 20:51:57,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 2872. [2021-06-12 20:51:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-06-12 20:51:57,626 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-06-12 20:51:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 20:51:57,626 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-06-12 20:51:57,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:51:57,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-06-12 20:51:57,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 20:51:57,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 20:51:57,628 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 20:51:57,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:51:57,829 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 20:51:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 20:51:57,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1053452280, now seen corresponding path program 171 times [2021-06-12 20:51:57,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 20:51:57,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278111619] [2021-06-12 20:51:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 20:51:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 20:51:58,153 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 20:51:58,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 20:51:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278111619] [2021-06-12 20:51:58,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278111619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:51:58,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119917340] [2021-06-12 20:51:58,154 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 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 20:51:58,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 20:51:58,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 20:51:58,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-06-12 20:51:58,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 20:52:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:52:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:52:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:52:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:52:53,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 20:52:53,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 20:52:53,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 44 [2021-06-12 20:52:53,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 20:52:53,114 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-06-12 20:52:53,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 20:52:53,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:12 [2021-06-12 20:52:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 20:52:53,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119917340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 20:52:53,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 20:52:53,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-06-12 20:52:53,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660706298] [2021-06-12 20:52:53,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 20:52:53,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 20:52:53,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 20:52:53,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1071, Unknown=21, NotChecked=0, Total=1190 [2021-06-12 20:52:53,126 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 20:54:39,288 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-06-12 20:54:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 20:54:39,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 20:54:39,490 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:811) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:725) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:364) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-06-12 20:54:39,494 INFO L168 Benchmark]: Toolchain (without parser) took 435072.30 ms. Allocated memory was 198.2 MB in the beginning and 614.5 MB in the end (delta: 416.3 MB). Free memory was 178.1 MB in the beginning and 518.5 MB in the end (delta: -340.4 MB). Peak memory consumption was 77.0 MB. Max. memory is 8.0 GB. [2021-06-12 20:54:39,494 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.65 ms. Allocated memory is still 198.2 MB. Free memory is still 179.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:54:39,494 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.46 ms. Allocated memory is still 198.2 MB. Free memory was 178.0 MB in the beginning and 176.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 20:54:39,494 INFO L168 Benchmark]: Boogie Preprocessor took 16.03 ms. Allocated memory is still 198.2 MB. Free memory was 176.6 MB in the beginning and 175.6 MB in the end (delta: 947.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 20:54:39,494 INFO L168 Benchmark]: RCFGBuilder took 227.79 ms. Allocated memory is still 198.2 MB. Free memory was 175.6 MB in the beginning and 163.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-06-12 20:54:39,494 INFO L168 Benchmark]: TraceAbstraction took 434800.70 ms. Allocated memory was 198.2 MB in the beginning and 614.5 MB in the end (delta: 416.3 MB). Free memory was 163.0 MB in the beginning and 518.5 MB in the end (delta: -355.5 MB). Peak memory consumption was 62.3 MB. Max. memory is 8.0 GB. [2021-06-12 20:54:39,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.65 ms. Allocated memory is still 198.2 MB. Free memory is still 179.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 22.46 ms. Allocated memory is still 198.2 MB. Free memory was 178.0 MB in the beginning and 176.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.03 ms. Allocated memory is still 198.2 MB. Free memory was 176.6 MB in the beginning and 175.6 MB in the end (delta: 947.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 227.79 ms. Allocated memory is still 198.2 MB. Free memory was 175.6 MB in the beginning and 163.4 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 434800.70 ms. Allocated memory was 198.2 MB in the beginning and 614.5 MB in the end (delta: 416.3 MB). Free memory was 163.0 MB in the beginning and 518.5 MB in the end (delta: -355.5 MB). Peak memory consumption was 62.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...