/usr/bin/java -Xmx16000000000 -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-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 06:06:48,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 06:06:48,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 06:06:48,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 06:06:48,946 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 06:06:48,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 06:06:48,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 06:06:48,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 06:06:48,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 06:06:48,949 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 06:06:48,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 06:06:48,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 06:06:48,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 06:06:48,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 06:06:48,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 06:06:48,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 06:06:48,958 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 06:06:49,309 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 [2021-06-05 06:06:49,330 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 06:06:49,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 06:06:49,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 06:06:49,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 06:06:49,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 06:06:49,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 06:06:49,331 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 06:06:49,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 06:06:49,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 06:06:49,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 06:06:49,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 06:06:49,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 06:06:49,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 06:06:49,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 06:06:49,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 06:06:49,332 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 06:06:49,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 06:06:49,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 06:06:49,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 06:06:49,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 06:06:49,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 06:06:49,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 06:06:49,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 06:06:49,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 06:06:49,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 06:06:49,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 06:06:49,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 06:06:49,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 06:06:49,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 06:06:49,334 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 06:06:49,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 06:06:49,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 06:06:49,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 06:06:49,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 06:06:49,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 06:06:49,659 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 06:06:49,660 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 06:06:49,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2021-06-05 06:06:49,661 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-06-05 06:06:49,692 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 06:06:49,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 06:06:49,694 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 06:06:49,694 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 06:06:49,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 06:06:49,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 06:06:49,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 06:06:49,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 06:06:49,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 06:06:49,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/1) ... [2021-06-05 06:06:49,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 06:06:49,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 06:06:49,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 06:06:49,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 06:06:49,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (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 [2021-06-05 06:06:49,801 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 06:06:49,801 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 06:06:49,801 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 06:06:49,802 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 06:06:49,802 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 06:06:49,802 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 06:06:49,802 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 06:06:49,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 06:06:49,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 06:06:49,803 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 06:06:49,992 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 06:06:49,992 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 06:06:49,994 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:06:49 BoogieIcfgContainer [2021-06-05 06:06:49,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 06:06:49,995 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 06:06:49,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 06:06:49,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 06:06:49,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 06:06:49" (1/2) ... [2021-06-05 06:06:49,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c98080e and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:06:49, skipping insertion in model container [2021-06-05 06:06:49,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:06:49" (2/2) ... [2021-06-05 06:06:50,000 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-06-05 06:06:50,005 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 06:06:50,005 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 06:06:50,005 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 06:06:50,006 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 06:06:50,059 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 06:06:50,078 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 06:06:50,108 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 06:06:50,108 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 06:06:50,109 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 06:06:50,109 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 06:06:50,109 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 06:06:50,109 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 06:06:50,109 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 06:06:50,109 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 06:06:50,116 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-06-05 06:06:50,134 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-06-05 06:06:50,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-06-05 06:06:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 06:06:50,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:50,143 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:50,143 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:50,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1635099045, now seen corresponding path program 1 times [2021-06-05 06:06:50,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:50,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445885490] [2021-06-05 06:06:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:50,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:50,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445885490] [2021-06-05 06:06:50,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445885490] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:06:50,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:06:50,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 06:06:50,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840300956] [2021-06-05 06:06:50,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 06:06:50,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:50,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 06:06:50,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:50,340 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:50,376 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-06-05 06:06:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 06:06:50,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 06:06:50,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:50,385 INFO L225 Difference]: With dead ends: 57 [2021-06-05 06:06:50,385 INFO L226 Difference]: Without dead ends: 50 [2021-06-05 06:06:50,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 06:06:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-05 06:06:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-06-05 06:06:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-06-05 06:06:50,418 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-06-05 06:06:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:50,419 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-06-05 06:06:50,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:50,419 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-06-05 06:06:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:06:50,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:50,420 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:50,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 06:06:50,420 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:50,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:50,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2119693475, now seen corresponding path program 1 times [2021-06-05 06:06:50,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:50,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955671870] [2021-06-05 06:06:50,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:50,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:50,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955671870] [2021-06-05 06:06:50,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955671870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:50,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343452945] [2021-06-05 06:06:50,540 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 [2021-06-05 06:06:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:50,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 06:06:50,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:50,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343452945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:50,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:50,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 06:06:50,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682397770] [2021-06-05 06:06:50,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 06:06:50,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:50,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 06:06:50,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:06:50,718 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:50,862 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-06-05 06:06:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 06:06:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:06:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:50,868 INFO L225 Difference]: With dead ends: 68 [2021-06-05 06:06:50,868 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 06:06:50,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:06:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 06:06:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-06-05 06:06:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-05 06:06:50,886 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-06-05 06:06:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:50,887 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-05 06:06:50,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:50,888 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-05 06:06:50,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:06:50,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:50,890 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:51,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 06:06:51,105 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:51,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:51,106 INFO L82 PathProgramCache]: Analyzing trace with hash 831812391, now seen corresponding path program 1 times [2021-06-05 06:06:51,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:51,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059135237] [2021-06-05 06:06:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:51,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:51,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059135237] [2021-06-05 06:06:51,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059135237] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:06:51,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:06:51,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:06:51,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193652747] [2021-06-05 06:06:51,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:06:51,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:51,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:06:51,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:06:51,170 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:51,242 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-06-05 06:06:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:06:51,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 06:06:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:51,248 INFO L225 Difference]: With dead ends: 71 [2021-06-05 06:06:51,252 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 06:06:51,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:06:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 06:06:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-06-05 06:06:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-06-05 06:06:51,258 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-06-05 06:06:51,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:51,258 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-06-05 06:06:51,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-06-05 06:06:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:06:51,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:51,259 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:51,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 06:06:51,259 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:51,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:51,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1002480409, now seen corresponding path program 2 times [2021-06-05 06:06:51,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:51,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524003467] [2021-06-05 06:06:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:51,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:51,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524003467] [2021-06-05 06:06:51,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524003467] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:06:51,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:06:51,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:06:51,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61314631] [2021-06-05 06:06:51,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:06:51,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:06:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:06:51,358 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:51,407 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-06-05 06:06:51,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 06:06:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 06:06:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:51,408 INFO L225 Difference]: With dead ends: 51 [2021-06-05 06:06:51,408 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 06:06:51,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:06:51,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 06:06:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-06-05 06:06:51,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-06-05 06:06:51,411 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-06-05 06:06:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:51,411 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-06-05 06:06:51,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,412 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-06-05 06:06:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 06:06:51,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:51,412 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:51,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 06:06:51,412 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:51,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1334159197, now seen corresponding path program 2 times [2021-06-05 06:06:51,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:51,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701100986] [2021-06-05 06:06:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:51,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:51,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701100986] [2021-06-05 06:06:51,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701100986] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 06:06:51,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 06:06:51,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 06:06:51,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954968742] [2021-06-05 06:06:51,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 06:06:51,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:51,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 06:06:51,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 06:06:51,446 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:51,526 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-06-05 06:06:51,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:06:51,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 06:06:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:51,527 INFO L225 Difference]: With dead ends: 51 [2021-06-05 06:06:51,527 INFO L226 Difference]: Without dead ends: 49 [2021-06-05 06:06:51,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 06:06:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-05 06:06:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-06-05 06:06:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-06-05 06:06:51,531 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-06-05 06:06:51,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:51,531 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-06-05 06:06:51,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:51,531 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-06-05 06:06:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:06:51,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:51,532 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:51,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 06:06:51,532 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:51,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1624375643, now seen corresponding path program 1 times [2021-06-05 06:06:51,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:51,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771746932] [2021-06-05 06:06:51,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:51,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:51,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771746932] [2021-06-05 06:06:51,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771746932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:51,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555590801] [2021-06-05 06:06:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:51,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:06:51,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:51,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:06:51,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-06-05 06:06:51,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:51,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:51,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:06:51,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-06-05 06:06:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555590801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:51,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:51,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:06:51,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987249138] [2021-06-05 06:06:51,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:06:51,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:06:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:06:51,985 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:52,061 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 06:06:52,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:06:52,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 06:06:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:52,063 INFO L225 Difference]: With dead ends: 86 [2021-06-05 06:06:52,063 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 06:06:52,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:06:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 06:06:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-06-05 06:06:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-06-05 06:06:52,074 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-06-05 06:06:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:52,074 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-06-05 06:06:52,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-06-05 06:06:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 06:06:52,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:52,075 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:52,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:52,276 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:52,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1933122355, now seen corresponding path program 2 times [2021-06-05 06:06:52,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:52,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134246174] [2021-06-05 06:06:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:52,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:52,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134246174] [2021-06-05 06:06:52,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134246174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:52,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786764364] [2021-06-05 06:06:52,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:52,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:52,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:52,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:06:52,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:52,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:06:52,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-06-05 06:06:52,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:52,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:52,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:06:52,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-06-05 06:06:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:52,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786764364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:52,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:52,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 06:06:52,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641499436] [2021-06-05 06:06:52,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 06:06:52,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:52,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 06:06:52,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:06:52,564 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:52,612 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-06-05 06:06:52,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 06:06:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:06:52,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:52,614 INFO L225 Difference]: With dead ends: 94 [2021-06-05 06:06:52,614 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 06:06:52,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 06:06:52,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 06:06:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-06-05 06:06:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-06-05 06:06:52,619 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-06-05 06:06:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:52,619 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-06-05 06:06:52,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-06-05 06:06:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:52,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:52,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:52,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:52,841 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash 210936483, now seen corresponding path program 3 times [2021-06-05 06:06:52,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:52,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897559507] [2021-06-05 06:06:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:52,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:52,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897559507] [2021-06-05 06:06:52,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897559507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:52,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192744122] [2021-06-05 06:06:52,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:52,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:06:52,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:06:52,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:53,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192744122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:53,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:53,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 06:06:53,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605755110] [2021-06-05 06:06:53,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 06:06:53,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:53,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 06:06:53,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:06:53,090 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:53,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:53,431 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-06-05 06:06:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:06:53,432 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:06:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:53,433 INFO L225 Difference]: With dead ends: 176 [2021-06-05 06:06:53,433 INFO L226 Difference]: Without dead ends: 176 [2021-06-05 06:06:53,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 294.1ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:06:53,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-05 06:06:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-06-05 06:06:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-06-05 06:06:53,438 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-06-05 06:06:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:53,439 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-06-05 06:06:53,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-06-05 06:06:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:53,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:53,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:53,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:53,656 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:53,656 INFO L82 PathProgramCache]: Analyzing trace with hash -492203993, now seen corresponding path program 4 times [2021-06-05 06:06:53,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:53,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637660341] [2021-06-05 06:06:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:53,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:53,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637660341] [2021-06-05 06:06:53,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637660341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:53,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092842295] [2021-06-05 06:06:53,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:53,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:06:53,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:53,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:06:53,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092842295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:53,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:53,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:06:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202910558] [2021-06-05 06:06:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:06:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:06:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:53,837 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:54,166 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-06-05 06:06:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 06:06:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:06:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:54,167 INFO L225 Difference]: With dead ends: 219 [2021-06-05 06:06:54,167 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 06:06:54,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:06:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 06:06:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-06-05 06:06:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-06-05 06:06:54,174 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-06-05 06:06:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:54,174 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-06-05 06:06:54,174 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-06-05 06:06:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:54,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:54,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:54,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:54,398 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:54,398 INFO L82 PathProgramCache]: Analyzing trace with hash 97165543, now seen corresponding path program 5 times [2021-06-05 06:06:54,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:54,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110203508] [2021-06-05 06:06:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:54,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:54,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110203508] [2021-06-05 06:06:54,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110203508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:54,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271637497] [2021-06-05 06:06:54,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:54,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:06:54,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:54,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:06:54,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:54,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271637497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:54,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:54,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 06:06:54,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482386489] [2021-06-05 06:06:54,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:06:54,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:06:54,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:54,618 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-06-05 06:06:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:54,912 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-06-05 06:06:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:06:54,912 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-06-05 06:06:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:54,913 INFO L225 Difference]: With dead ends: 208 [2021-06-05 06:06:54,914 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 06:06:54,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:06:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 06:06:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-06-05 06:06:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-06-05 06:06:54,920 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-06-05 06:06:54,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:54,920 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-06-05 06:06:54,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-06-05 06:06:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-06-05 06:06:54,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:54,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:54,922 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:55,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:55,143 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash -234513245, now seen corresponding path program 6 times [2021-06-05 06:06:55,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:55,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945947972] [2021-06-05 06:06:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:55,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:55,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945947972] [2021-06-05 06:06:55,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945947972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:55,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400320021] [2021-06-05 06:06:55,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:55,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:06:55,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:06:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400320021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:55,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:55,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 06:06:55,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693976505] [2021-06-05 06:06:55,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:06:55,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:06:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:55,347 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-06-05 06:06:55,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:55,623 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-06-05 06:06:55,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:06:55,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-06-05 06:06:55,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:55,625 INFO L225 Difference]: With dead ends: 205 [2021-06-05 06:06:55,625 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 06:06:55,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:06:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 06:06:55,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-06-05 06:06:55,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:55,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-05 06:06:55,631 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-06-05 06:06:55,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:55,631 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-05 06:06:55,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-06-05 06:06:55,631 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-05 06:06:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:55,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:55,632 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:55,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:55,853 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:55,854 INFO L82 PathProgramCache]: Analyzing trace with hash -2122602315, now seen corresponding path program 7 times [2021-06-05 06:06:55,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:55,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983264582] [2021-06-05 06:06:55,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:55,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983264582] [2021-06-05 06:06:55,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983264582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:55,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256427688] [2021-06-05 06:06:55,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:06:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:55,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:06:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:56,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256427688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:56,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:56,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:06:56,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629502464] [2021-06-05 06:06:56,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:06:56,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:06:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:56,024 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-06-05 06:06:56,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:56,350 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-06-05 06:06:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:06:56,351 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 20 [2021-06-05 06:06:56,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:56,355 INFO L225 Difference]: With dead ends: 300 [2021-06-05 06:06:56,355 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 06:06:56,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:06:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 06:06:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-06-05 06:06:56,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-06-05 06:06:56,365 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-06-05 06:06:56,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:56,365 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-06-05 06:06:56,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-06-05 06:06:56,366 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-06-05 06:06:56,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:56,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:56,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:56,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 06:06:56,591 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash -530595531, now seen corresponding path program 8 times [2021-06-05 06:06:56,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:56,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590728290] [2021-06-05 06:06:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:56,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:56,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590728290] [2021-06-05 06:06:56,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590728290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:56,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865307838] [2021-06-05 06:06:56,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:56,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:06:56,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:56,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:06:56,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:56,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865307838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:56,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:56,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 06:06:56,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141712882] [2021-06-05 06:06:56,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:06:56,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:06:56,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:56,750 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:56,989 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-06-05 06:06:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 06:06:56,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 06:06:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:56,991 INFO L225 Difference]: With dead ends: 238 [2021-06-05 06:06:56,991 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 06:06:56,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:06:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 06:06:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-06-05 06:06:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-06-05 06:06:56,996 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-06-05 06:06:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:56,997 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-06-05 06:06:56,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-06-05 06:06:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:56,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:56,997 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:57,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:57,213 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash 420283757, now seen corresponding path program 9 times [2021-06-05 06:06:57,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:57,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135579524] [2021-06-05 06:06:57,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:06:57,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:57,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135579524] [2021-06-05 06:06:57,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135579524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:57,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947284434] [2021-06-05 06:06:57,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:57,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:06:57,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:06:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:57,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947284434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:57,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:57,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 06:06:57,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552370529] [2021-06-05 06:06:57,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 06:06:57,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 06:06:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 06:06:57,373 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-06-05 06:06:57,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:57,617 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-06-05 06:06:57,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 06:06:57,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 20 [2021-06-05 06:06:57,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:57,619 INFO L225 Difference]: With dead ends: 302 [2021-06-05 06:06:57,619 INFO L226 Difference]: Without dead ends: 300 [2021-06-05 06:06:57,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:06:57,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-05 06:06:57,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-06-05 06:06:57,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-06-05 06:06:57,626 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-06-05 06:06:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:57,627 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-06-05 06:06:57,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-06-05 06:06:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-06-05 06:06:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 06:06:57,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:57,627 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:57,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:57,841 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash -86062509, now seen corresponding path program 10 times [2021-06-05 06:06:57,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:57,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547976421] [2021-06-05 06:06:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:57,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:57,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:57,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547976421] [2021-06-05 06:06:57,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547976421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:57,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170525583] [2021-06-05 06:06:57,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:57,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:06:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 06:06:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:58,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170525583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:58,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:58,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 06:06:58,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114939387] [2021-06-05 06:06:58,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:06:58,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:58,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:06:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:58,007 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2021-06-05 06:06:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:58,258 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-06-05 06:06:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 06:06:58,258 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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 20 [2021-06-05 06:06:58,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:58,260 INFO L225 Difference]: With dead ends: 302 [2021-06-05 06:06:58,260 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 06:06:58,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:06:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 06:06:58,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-05 06:06:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-06-05 06:06:58,267 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-06-05 06:06:58,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:58,267 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-06-05 06:06:58,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 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) [2021-06-05 06:06:58,267 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-06-05 06:06:58,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:58,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:58,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:58,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 06:06:58,481 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1988809563, now seen corresponding path program 11 times [2021-06-05 06:06:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:58,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092005046] [2021-06-05 06:06:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:58,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:58,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092005046] [2021-06-05 06:06:58,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092005046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:58,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249481115] [2021-06-05 06:06:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:06:58,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:06:58,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:06:58,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:06:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:06:58,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:06:58,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:06:58,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 06:06:58,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:58,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:58,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:06:58,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 06:06:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:58,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249481115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:58,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:58,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:06:58,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506154919] [2021-06-05 06:06:58,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:06:58,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:58,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:06:58,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:58,829 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:58,953 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-06-05 06:06:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:06:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:06:58,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:58,955 INFO L225 Difference]: With dead ends: 282 [2021-06-05 06:06:58,955 INFO L226 Difference]: Without dead ends: 257 [2021-06-05 06:06:58,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-05 06:06:58,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-06-05 06:06:58,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 213 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:58,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-06-05 06:06:58,961 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-06-05 06:06:58,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:58,961 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-06-05 06:06:58,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:58,961 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-06-05 06:06:58,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:58,961 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:58,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:59,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 06:06:59,184 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:59,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:59,184 INFO L82 PathProgramCache]: Analyzing trace with hash 197742959, now seen corresponding path program 12 times [2021-06-05 06:06:59,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:59,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557840592] [2021-06-05 06:06:59,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:59,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:59,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557840592] [2021-06-05 06:06:59,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557840592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:59,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158632307] [2021-06-05 06:06:59,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:06:59,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:06:59,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:06:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:06:59,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:06:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:06:59,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:06:59,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:06:59,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 06:06:59,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:06:59,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:06:59,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:06:59,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 06:06:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:59,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158632307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:59,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:06:59,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:06:59,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2870133] [2021-06-05 06:06:59,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:06:59,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:06:59,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:06:59,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:06:59,484 INFO L87 Difference]: Start difference. First operand 214 states and 499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:59,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:06:59,595 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-06-05 06:06:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:06:59,596 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:06:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:06:59,597 INFO L225 Difference]: With dead ends: 256 [2021-06-05 06:06:59,597 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 06:06:59,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 06:06:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 06:06:59,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-06-05 06:06:59,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3529411764705883) internal successors, (520), 221 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:59,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-06-05 06:06:59,603 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-06-05 06:06:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:06:59,603 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-06-05 06:06:59,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:06:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-06-05 06:06:59,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:06:59,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:06:59,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:06:59,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 06:06:59,821 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:06:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:06:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1748301367, now seen corresponding path program 13 times [2021-06-05 06:06:59,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:06:59,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68520322] [2021-06-05 06:06:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:06:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:59,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:06:59,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:06:59,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68520322] [2021-06-05 06:06:59,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68520322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:06:59,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620282433] [2021-06-05 06:06:59,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:06:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:06:59,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:06:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:00,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:00,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:00,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:00,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:00,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 06:07:00,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:00,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:00,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:00,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 06:07:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:00,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620282433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:00,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:00,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:07:00,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562532716] [2021-06-05 06:07:00,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:07:00,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:00,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:07:00,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:07:00,135 INFO L87 Difference]: Start difference. First operand 222 states and 520 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:00,282 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-06-05 06:07:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 06:07:00,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:07:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:00,283 INFO L225 Difference]: With dead ends: 301 [2021-06-05 06:07:00,284 INFO L226 Difference]: Without dead ends: 278 [2021-06-05 06:07:00,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:07:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-05 06:07:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-06-05 06:07:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.3584070796460175) internal successors, (533), 226 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-06-05 06:07:00,290 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-06-05 06:07:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:00,290 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-06-05 06:07:00,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-06-05 06:07:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 06:07:00,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:00,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:00,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:00,514 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:00,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:00,514 INFO L82 PathProgramCache]: Analyzing trace with hash 343984883, now seen corresponding path program 14 times [2021-06-05 06:07:00,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:00,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321037331] [2021-06-05 06:07:00,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:00,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321037331] [2021-06-05 06:07:00,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321037331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840983233] [2021-06-05 06:07:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:00,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:00,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:00,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 06:07:00,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:00,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:00,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:00,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:00,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-05 06:07:00,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:00,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:00,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:00,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-05 06:07:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:00,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840983233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:00,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:00,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 06:07:00,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175690646] [2021-06-05 06:07:00,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 06:07:00,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 06:07:00,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:07:00,817 INFO L87 Difference]: Start difference. First operand 227 states and 533 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:00,950 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-06-05 06:07:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 06:07:00,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 06:07:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:00,952 INFO L225 Difference]: With dead ends: 320 [2021-06-05 06:07:00,952 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 06:07:00,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 06:07:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 06:07:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-06-05 06:07:00,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.363265306122449) internal successors, (579), 245 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-06-05 06:07:00,959 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-06-05 06:07:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:00,959 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-06-05 06:07:00,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-06-05 06:07:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:00,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:00,961 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:01,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:01,180 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:01,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:01,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1412718173, now seen corresponding path program 15 times [2021-06-05 06:07:01,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:01,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453978584] [2021-06-05 06:07:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:01,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:01,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453978584] [2021-06-05 06:07:01,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453978584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:01,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074823298] [2021-06-05 06:07:01,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:01,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:07:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:01,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:01,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074823298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:01,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:01,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 06:07:01,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813870636] [2021-06-05 06:07:01,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:01,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:01,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:01,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:01,426 INFO L87 Difference]: Start difference. First operand 246 states and 579 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:01,933 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-06-05 06:07:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:07:01,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:01,935 INFO L225 Difference]: With dead ends: 495 [2021-06-05 06:07:01,936 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 06:07:01,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 455.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:07:01,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 06:07:01,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-06-05 06:07:01,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3628691983122363) internal successors, (560), 237 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-06-05 06:07:01,944 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-06-05 06:07:01,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:01,944 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-06-05 06:07:01,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:01,944 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-06-05 06:07:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:01,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:01,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:02,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:02,161 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:02,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:02,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1474117159, now seen corresponding path program 16 times [2021-06-05 06:07:02,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:02,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794926752] [2021-06-05 06:07:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:02,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:02,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794926752] [2021-06-05 06:07:02,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794926752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:02,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175529573] [2021-06-05 06:07:02,222 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 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 [2021-06-05 06:07:02,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:02,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:02,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:02,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:02,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175529573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:02,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:02,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:07:02,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317577631] [2021-06-05 06:07:02,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:02,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:02,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:02,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:02,390 INFO L87 Difference]: Start difference. First operand 238 states and 560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:02,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:02,996 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-06-05 06:07:02,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:07:02,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:02,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:02,999 INFO L225 Difference]: With dead ends: 696 [2021-06-05 06:07:02,999 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 06:07:03,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:07:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 06:07:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-06-05 06:07:03,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.378839590443686) internal successors, (697), 293 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-06-05 06:07:03,012 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-06-05 06:07:03,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:03,013 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-06-05 06:07:03,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,013 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-06-05 06:07:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:03,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:03,015 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:03,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 06:07:03,233 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:03,233 INFO L82 PathProgramCache]: Analyzing trace with hash -964250137, now seen corresponding path program 17 times [2021-06-05 06:07:03,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:03,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237448962] [2021-06-05 06:07:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:03,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:03,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:03,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237448962] [2021-06-05 06:07:03,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237448962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:03,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136606358] [2021-06-05 06:07:03,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:03,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:07:03,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:03,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:03,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:03,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136606358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:03,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:03,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 06:07:03,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181608341] [2021-06-05 06:07:03,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:07:03,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:03,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:07:03,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:07:03,427 INFO L87 Difference]: Start difference. First operand 294 states and 697 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:03,940 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-06-05 06:07:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:07:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:03,943 INFO L225 Difference]: With dead ends: 654 [2021-06-05 06:07:03,943 INFO L226 Difference]: Without dead ends: 652 [2021-06-05 06:07:03,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:07:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-05 06:07:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-06-05 06:07:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4238227146814406) internal successors, (875), 361 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-06-05 06:07:03,956 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-06-05 06:07:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:03,957 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-06-05 06:07:03,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-06-05 06:07:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:03,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:03,957 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:04,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 06:07:04,180 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1295928925, now seen corresponding path program 18 times [2021-06-05 06:07:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:04,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887655038] [2021-06-05 06:07:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:04,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:04,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887655038] [2021-06-05 06:07:04,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887655038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:04,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690464152] [2021-06-05 06:07:04,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:04,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:07:04,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:04,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:04,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:04,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690464152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:04,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:04,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 06:07:04,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054654502] [2021-06-05 06:07:04,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:07:04,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:07:04,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:07:04,406 INFO L87 Difference]: Start difference. First operand 362 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:04,821 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-06-05 06:07:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:07:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:04,823 INFO L225 Difference]: With dead ends: 539 [2021-06-05 06:07:04,823 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 06:07:04,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:07:04,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 06:07:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-06-05 06:07:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4210526315789473) internal successors, (874), 361 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-06-05 06:07:04,834 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-06-05 06:07:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:04,834 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-06-05 06:07:04,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-06-05 06:07:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:04,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:04,835 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:05,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 06:07:05,053 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:05,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:05,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1782884239, now seen corresponding path program 19 times [2021-06-05 06:07:05,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:05,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114451883] [2021-06-05 06:07:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:05,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:05,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114451883] [2021-06-05 06:07:05,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114451883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:05,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102399695] [2021-06-05 06:07:05,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:05,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:05,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:05,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102399695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:05,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:05,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 06:07:05,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788440467] [2021-06-05 06:07:05,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:07:05,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:05,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:07:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:07:05,250 INFO L87 Difference]: Start difference. First operand 362 states and 874 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:05,584 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-06-05 06:07:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:07:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:05,586 INFO L225 Difference]: With dead ends: 593 [2021-06-05 06:07:05,586 INFO L226 Difference]: Without dead ends: 584 [2021-06-05 06:07:05,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:07:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-05 06:07:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-06-05 06:07:05,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.4424083769633507) internal successors, (933), 382 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-06-05 06:07:05,597 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-06-05 06:07:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:05,597 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-06-05 06:07:05,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-06-05 06:07:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:05,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:05,598 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:05,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 06:07:05,813 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:05,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:05,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1338351217, now seen corresponding path program 20 times [2021-06-05 06:07:05,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:05,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126432857] [2021-06-05 06:07:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:05,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:05,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126432857] [2021-06-05 06:07:05,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126432857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:05,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659038239] [2021-06-05 06:07:05,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:05,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:05,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:05,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:05,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:05,993 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:05,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659038239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:05,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:05,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:07:05,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952878179] [2021-06-05 06:07:05,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:05,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:05,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:05,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:05,994 INFO L87 Difference]: Start difference. First operand 383 states and 933 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:06,461 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-06-05 06:07:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:07:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:06,472 INFO L225 Difference]: With dead ends: 701 [2021-06-05 06:07:06,472 INFO L226 Difference]: Without dead ends: 687 [2021-06-05 06:07:06,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:07:06,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-05 06:07:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-06-05 06:07:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4363636363636365) internal successors, (938), 385 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-06-05 06:07:06,493 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-06-05 06:07:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:06,493 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-06-05 06:07:06,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:06,494 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-06-05 06:07:06,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:06,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:06,495 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:06,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 06:07:06,718 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1334899385, now seen corresponding path program 21 times [2021-06-05 06:07:06,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:06,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750583266] [2021-06-05 06:07:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:06,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750583266] [2021-06-05 06:07:06,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750583266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174055060] [2021-06-05 06:07:06,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:06,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:07:06,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:06,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:06,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:06,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174055060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:06,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:06,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:07:06,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840408842] [2021-06-05 06:07:06,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:06,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:06,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:06,911 INFO L87 Difference]: Start difference. First operand 386 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:07,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:07,360 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-06-05 06:07:07,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 06:07:07,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:07,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:07,363 INFO L225 Difference]: With dead ends: 817 [2021-06-05 06:07:07,363 INFO L226 Difference]: Without dead ends: 817 [2021-06-05 06:07:07,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:07:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-05 06:07:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-06-05 06:07:07,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.407862407862408) internal successors, (980), 407 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-06-05 06:07:07,374 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-06-05 06:07:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:07,374 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-06-05 06:07:07,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:07,375 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-06-05 06:07:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:07,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:07,376 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:07,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:07,593 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:07,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2049905863, now seen corresponding path program 22 times [2021-06-05 06:07:07,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:07,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871776737] [2021-06-05 06:07:07,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:07,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:07,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871776737] [2021-06-05 06:07:07,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871776737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:07,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941399532] [2021-06-05 06:07:07,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:07,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:07,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:07,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:07,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:07,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941399532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:07,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:07,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:07:07,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753357286] [2021-06-05 06:07:07,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:07,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:07,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:07,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:07,792 INFO L87 Difference]: Start difference. First operand 408 states and 980 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:08,184 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-06-05 06:07:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 06:07:08,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:08,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:08,186 INFO L225 Difference]: With dead ends: 578 [2021-06-05 06:07:08,186 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 06:07:08,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 365.4ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:07:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 06:07:08,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-06-05 06:07:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.398034398034398) internal successors, (976), 407 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-06-05 06:07:08,195 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-06-05 06:07:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:08,195 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-06-05 06:07:08,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-06-05 06:07:08,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:08,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:08,196 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:08,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 06:07:08,419 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:08,420 INFO L82 PathProgramCache]: Analyzing trace with hash -275355531, now seen corresponding path program 23 times [2021-06-05 06:07:08,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:08,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811687039] [2021-06-05 06:07:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:08,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:08,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811687039] [2021-06-05 06:07:08,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811687039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:08,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258839388] [2021-06-05 06:07:08,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:08,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:07:08,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:08,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:08,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258839388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:08,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:08,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:07:08,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363868046] [2021-06-05 06:07:08,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:08,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:08,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:08,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:08,628 INFO L87 Difference]: Start difference. First operand 408 states and 976 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-06-05 06:07:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:09,113 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-06-05 06:07:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:07:09,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:09,116 INFO L225 Difference]: With dead ends: 943 [2021-06-05 06:07:09,116 INFO L226 Difference]: Without dead ends: 943 [2021-06-05 06:07:09,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:07:09,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-05 06:07:09,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-06-05 06:07:09,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.4857594936708862) internal successors, (1571), 632 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) [2021-06-05 06:07:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-06-05 06:07:09,129 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-06-05 06:07:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:09,130 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-06-05 06:07:09,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-06-05 06:07:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-06-05 06:07:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:09,131 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:09,131 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:09,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:09,336 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:09,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:09,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2027436755, now seen corresponding path program 24 times [2021-06-05 06:07:09,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:09,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071622683] [2021-06-05 06:07:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:09,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:09,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071622683] [2021-06-05 06:07:09,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071622683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:09,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125621877] [2021-06-05 06:07:09,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:07:09,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:07:09,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:09,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:09,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:09,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125621877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:09,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:09,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 06:07:09,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792528412] [2021-06-05 06:07:09,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 06:07:09,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:09,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 06:07:09,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 06:07:09,555 INFO L87 Difference]: Start difference. First operand 633 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:09,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:09,909 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-06-05 06:07:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 06:07:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:09,912 INFO L225 Difference]: With dead ends: 910 [2021-06-05 06:07:09,912 INFO L226 Difference]: Without dead ends: 906 [2021-06-05 06:07:09,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 06:07:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-05 06:07:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-06-05 06:07:09,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.481012658227848) internal successors, (1568), 632 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-06-05 06:07:09,926 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-06-05 06:07:09,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:09,926 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-06-05 06:07:09,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:09,926 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-06-05 06:07:09,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:09,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:09,928 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:10,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 06:07:10,151 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:10,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:10,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1761184275, now seen corresponding path program 25 times [2021-06-05 06:07:10,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:10,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104078177] [2021-06-05 06:07:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:10,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:10,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104078177] [2021-06-05 06:07:10,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104078177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:10,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153931357] [2021-06-05 06:07:10,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:10,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:10,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153931357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:10,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:10,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 06:07:10,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066625969] [2021-06-05 06:07:10,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 06:07:10,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:10,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 06:07:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 06:07:10,346 INFO L87 Difference]: Start difference. First operand 633 states and 1568 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:10,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:10,768 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-06-05 06:07:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 06:07:10,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:10,771 INFO L225 Difference]: With dead ends: 997 [2021-06-05 06:07:10,771 INFO L226 Difference]: Without dead ends: 985 [2021-06-05 06:07:10,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 06:07:10,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-05 06:07:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-06-05 06:07:10,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4963396778916547) internal successors, (1705), 683 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-06-05 06:07:10,788 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-06-05 06:07:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:10,789 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-06-05 06:07:10,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-06-05 06:07:10,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 06:07:10,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:10,792 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:11,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:11,005 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1533962895, now seen corresponding path program 26 times [2021-06-05 06:07:11,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:11,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241456636] [2021-06-05 06:07:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:11,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241456636] [2021-06-05 06:07:11,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241456636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:11,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375448033] [2021-06-05 06:07:11,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:11,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:11,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 06:07:11,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:11,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375448033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:11,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:11,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 06:07:11,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059578492] [2021-06-05 06:07:11,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 06:07:11,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:11,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 06:07:11,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 06:07:11,189 INFO L87 Difference]: Start difference. First operand 684 states and 1705 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:11,628 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-06-05 06:07:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:07:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 06:07:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:11,632 INFO L225 Difference]: With dead ends: 1028 [2021-06-05 06:07:11,632 INFO L226 Difference]: Without dead ends: 1008 [2021-06-05 06:07:11,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:07:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-05 06:07:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-06-05 06:07:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.5087956698240865) internal successors, (1854), 739 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-06-05 06:07:11,645 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-06-05 06:07:11,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:11,645 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-06-05 06:07:11,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-06-05 06:07:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:11,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:11,647 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:11,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 06:07:11,861 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1047161765, now seen corresponding path program 27 times [2021-06-05 06:07:11,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:11,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527964287] [2021-06-05 06:07:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:12,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:12,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527964287] [2021-06-05 06:07:12,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527964287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:12,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651960001] [2021-06-05 06:07:12,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:12,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 06:07:12,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:12,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:07:12,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:12,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:12,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:12,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:12,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:12,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-06-05 06:07:12,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:07:12,861 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-06-05 06:07:12,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:07:12,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-06-05 06:07:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:12,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651960001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:12,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:12,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-05 06:07:12,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085258600] [2021-06-05 06:07:12,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:07:12,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:12,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:07:12,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:07:12,938 INFO L87 Difference]: Start difference. First operand 740 states and 1854 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:14,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:14,161 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-06-05 06:07:14,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:07:14,161 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:14,164 INFO L225 Difference]: With dead ends: 1044 [2021-06-05 06:07:14,164 INFO L226 Difference]: Without dead ends: 1030 [2021-06-05 06:07:14,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1273.9ms TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 06:07:14,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-05 06:07:14,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-06-05 06:07:14,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.508609271523179) internal successors, (1894), 755 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-06-05 06:07:14,177 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-06-05 06:07:14,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:14,178 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-06-05 06:07:14,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-06-05 06:07:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:14,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:14,179 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:14,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:14,401 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:14,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:14,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1487367885, now seen corresponding path program 28 times [2021-06-05 06:07:14,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:14,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227867129] [2021-06-05 06:07:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:14,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:14,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:14,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227867129] [2021-06-05 06:07:14,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227867129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:14,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352300759] [2021-06-05 06:07:14,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:14,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:14,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:14,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:07:14,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:14,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:14,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:14,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:14,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:14,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 06:07:14,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:14,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:14,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:14,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 06:07:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:14,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352300759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:14,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:14,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 06:07:14,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721235463] [2021-06-05 06:07:14,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:14,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:14,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:14,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:14,974 INFO L87 Difference]: Start difference. First operand 756 states and 1894 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:16,055 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-06-05 06:07:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:07:16,055 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:16,059 INFO L225 Difference]: With dead ends: 1114 [2021-06-05 06:07:16,059 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 06:07:16,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1104.7ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:07:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 06:07:16,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-06-05 06:07:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.489795918367347) internal successors, (1952), 784 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-06-05 06:07:16,075 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-06-05 06:07:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:16,076 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-06-05 06:07:16,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:16,076 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-06-05 06:07:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:16,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:16,078 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:16,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 06:07:16,285 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:16,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:16,285 INFO L82 PathProgramCache]: Analyzing trace with hash 15104427, now seen corresponding path program 29 times [2021-06-05 06:07:16,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:16,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889074811] [2021-06-05 06:07:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:16,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:16,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:16,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889074811] [2021-06-05 06:07:16,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889074811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:16,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145329300] [2021-06-05 06:07:16,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:16,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:07:16,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:16,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:07:16,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:16,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:16,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:16,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:16,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:16,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:16,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 06:07:16,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:16,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:16,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:16,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 06:07:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:16,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145329300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:16,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:16,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 06:07:16,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022979347] [2021-06-05 06:07:16,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:16,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:16,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:16,805 INFO L87 Difference]: Start difference. First operand 785 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:18,136 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-06-05 06:07:18,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:07:18,136 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:18,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:18,141 INFO L225 Difference]: With dead ends: 1322 [2021-06-05 06:07:18,141 INFO L226 Difference]: Without dead ends: 1313 [2021-06-05 06:07:18,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1281.3ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:07:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-05 06:07:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-06-05 06:07:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.491504854368932) internal successors, (2053), 824 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-06-05 06:07:18,159 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-06-05 06:07:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:18,159 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-06-05 06:07:18,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-06-05 06:07:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:18,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:18,161 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:18,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:18,377 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:18,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash 889695859, now seen corresponding path program 30 times [2021-06-05 06:07:18,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:18,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902827168] [2021-06-05 06:07:18,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:18,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:18,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902827168] [2021-06-05 06:07:18,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902827168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:18,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847188709] [2021-06-05 06:07:18,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:18,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:18,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:18,656 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 06:07:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:19,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:19,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:19,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:19,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:19,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:19,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:19,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 7 [2021-06-05 06:07:19,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:19,029 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.5 percent of original size [2021-06-05 06:07:19,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:19,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:7 [2021-06-05 06:07:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:19,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847188709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:19,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:19,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:07:19,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144572757] [2021-06-05 06:07:19,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:19,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:19,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:19,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:19,057 INFO L87 Difference]: Start difference. First operand 825 states and 2053 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) [2021-06-05 06:07:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:19,937 INFO L93 Difference]: Finished difference Result 1058 states and 2506 transitions. [2021-06-05 06:07:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 06:07:19,937 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 26 [2021-06-05 06:07:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:19,941 INFO L225 Difference]: With dead ends: 1058 [2021-06-05 06:07:19,941 INFO L226 Difference]: Without dead ends: 1026 [2021-06-05 06:07:19,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 901.2ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:07:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-06-05 06:07:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 871. [2021-06-05 06:07:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.5068965517241377) internal successors, (2181), 870 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2181 transitions. [2021-06-05 06:07:19,958 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2181 transitions. Word has length 26 [2021-06-05 06:07:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:19,958 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2181 transitions. [2021-06-05 06:07:19,958 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) [2021-06-05 06:07:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2181 transitions. [2021-06-05 06:07:19,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:19,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:19,960 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:20,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:20,183 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:20,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2122713361, now seen corresponding path program 31 times [2021-06-05 06:07:20,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:20,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185514881] [2021-06-05 06:07:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:20,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:20,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185514881] [2021-06-05 06:07:20,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185514881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:20,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441740189] [2021-06-05 06:07:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:07:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:20,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:07:20,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:20,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:20,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:20,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:20,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:20,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:20,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 06:07:20,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:20,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:20,645 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:20,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 06:07:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:20,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441740189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:20,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:20,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 06:07:20,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716462797] [2021-06-05 06:07:20,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:20,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:20,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:20,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:20,664 INFO L87 Difference]: Start difference. First operand 871 states and 2181 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:21,543 INFO L93 Difference]: Finished difference Result 1083 states and 2599 transitions. [2021-06-05 06:07:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:07:21,543 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:21,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:21,546 INFO L225 Difference]: With dead ends: 1083 [2021-06-05 06:07:21,546 INFO L226 Difference]: Without dead ends: 1052 [2021-06-05 06:07:21,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 845.3ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:07:21,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-05 06:07:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 900. [2021-06-05 06:07:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.50055617352614) internal successors, (2248), 899 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2248 transitions. [2021-06-05 06:07:21,562 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2248 transitions. Word has length 26 [2021-06-05 06:07:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:21,562 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2248 transitions. [2021-06-05 06:07:21,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2248 transitions. [2021-06-05 06:07:21,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:21,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:21,564 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:21,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 06:07:21,785 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:21,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1180327377, now seen corresponding path program 32 times [2021-06-05 06:07:21,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:21,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521284150] [2021-06-05 06:07:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:22,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:22,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521284150] [2021-06-05 06:07:22,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521284150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:22,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882063369] [2021-06-05 06:07:22,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:07:22,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:22,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:22,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:07:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:22,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:22,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:22,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:22,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:22,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:22,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:22,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:22,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 06:07:22,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:22,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:22,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:22,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 06:07:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:22,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882063369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:22,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:22,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 06:07:22,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818318893] [2021-06-05 06:07:22,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:22,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:22,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:22,345 INFO L87 Difference]: Start difference. First operand 900 states and 2248 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:23,557 INFO L93 Difference]: Finished difference Result 1238 states and 2925 transitions. [2021-06-05 06:07:23,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:07:23,557 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:23,561 INFO L225 Difference]: With dead ends: 1238 [2021-06-05 06:07:23,562 INFO L226 Difference]: Without dead ends: 1186 [2021-06-05 06:07:23,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1193.5ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 06:07:23,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-05 06:07:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 957. [2021-06-05 06:07:23,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.5) internal successors, (2390), 956 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2390 transitions. [2021-06-05 06:07:23,577 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2390 transitions. Word has length 26 [2021-06-05 06:07:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:23,577 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 2390 transitions. [2021-06-05 06:07:23,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2390 transitions. [2021-06-05 06:07:23,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:23,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:23,579 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:23,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:23,797 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash -514620625, now seen corresponding path program 33 times [2021-06-05 06:07:23,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:23,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700899093] [2021-06-05 06:07:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:24,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:24,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700899093] [2021-06-05 06:07:24,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700899093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:24,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612049619] [2021-06-05 06:07:24,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:24,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:07:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:24,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 06:07:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:24,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:24,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:24,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:24,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:24,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:24,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:24,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:24,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:24,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 47 [2021-06-05 06:07:24,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:07:24,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:24,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:07:24,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:27 [2021-06-05 06:07:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:24,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612049619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:24,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:24,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 06:07:24,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280593088] [2021-06-05 06:07:24,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:07:24,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:24,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:07:24,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:07:24,475 INFO L87 Difference]: Start difference. First operand 957 states and 2390 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:26,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:26,198 INFO L93 Difference]: Finished difference Result 1077 states and 2608 transitions. [2021-06-05 06:07:26,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:07:26,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:26,201 INFO L225 Difference]: With dead ends: 1077 [2021-06-05 06:07:26,201 INFO L226 Difference]: Without dead ends: 1042 [2021-06-05 06:07:26,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1622.2ms TimeCoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:07:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-05 06:07:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 964. [2021-06-05 06:07:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.4942886812045693) internal successors, (2402), 963 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2402 transitions. [2021-06-05 06:07:26,216 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2402 transitions. Word has length 26 [2021-06-05 06:07:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:26,217 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 2402 transitions. [2021-06-05 06:07:26,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2402 transitions. [2021-06-05 06:07:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:26,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:26,219 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:26,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 06:07:26,429 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash 102747963, now seen corresponding path program 34 times [2021-06-05 06:07:26,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:26,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314559417] [2021-06-05 06:07:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:26,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:26,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314559417] [2021-06-05 06:07:26,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314559417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:26,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440304893] [2021-06-05 06:07:26,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:26,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:26,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:07:26,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:26,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:26,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:26,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:26,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:26,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:26,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:26,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:26,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 06:07:26,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:26,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:26,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:26,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 06:07:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:26,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440304893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:26,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:26,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-05 06:07:26,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22574861] [2021-06-05 06:07:26,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:26,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:26,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:26,997 INFO L87 Difference]: Start difference. First operand 964 states and 2402 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:28,014 INFO L93 Difference]: Finished difference Result 1320 states and 3177 transitions. [2021-06-05 06:07:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 06:07:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:28,017 INFO L225 Difference]: With dead ends: 1320 [2021-06-05 06:07:28,017 INFO L226 Difference]: Without dead ends: 1283 [2021-06-05 06:07:28,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 980.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:07:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-06-05 06:07:28,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 995. [2021-06-05 06:07:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.4989939637826963) internal successors, (2484), 994 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2484 transitions. [2021-06-05 06:07:28,031 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2484 transitions. Word has length 26 [2021-06-05 06:07:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:28,031 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2484 transitions. [2021-06-05 06:07:28,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2484 transitions. [2021-06-05 06:07:28,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:28,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:28,033 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:28,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:28,255 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:28,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1163999753, now seen corresponding path program 35 times [2021-06-05 06:07:28,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:28,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575003927] [2021-06-05 06:07:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:28,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:28,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575003927] [2021-06-05 06:07:28,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575003927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:28,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761132407] [2021-06-05 06:07:28,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:28,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:07:28,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:07:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:28,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:28,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:28,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:28,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:28,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:28,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:28,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 06:07:28,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:28,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:28,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:28,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 06:07:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:28,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761132407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:28,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:28,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 06:07:28,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448216984] [2021-06-05 06:07:28,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:28,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:28,733 INFO L87 Difference]: Start difference. First operand 995 states and 2484 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:29,553 INFO L93 Difference]: Finished difference Result 1297 states and 3058 transitions. [2021-06-05 06:07:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 06:07:29,553 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:29,555 INFO L225 Difference]: With dead ends: 1297 [2021-06-05 06:07:29,555 INFO L226 Difference]: Without dead ends: 1263 [2021-06-05 06:07:29,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:07:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-06-05 06:07:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1043. [2021-06-05 06:07:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.513435700575816) internal successors, (2619), 1042 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2619 transitions. [2021-06-05 06:07:29,570 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2619 transitions. Word has length 26 [2021-06-05 06:07:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:29,570 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 2619 transitions. [2021-06-05 06:07:29,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2619 transitions. [2021-06-05 06:07:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:29,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:29,572 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:29,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 06:07:29,780 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:29,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:29,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1726651059, now seen corresponding path program 36 times [2021-06-05 06:07:29,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:29,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498963496] [2021-06-05 06:07:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:29,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:29,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:29,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498963496] [2021-06-05 06:07:29,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498963496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:29,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727992097] [2021-06-05 06:07:29,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:30,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 06:07:30,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:30,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 06:07:30,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:30,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:30,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:30,337 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:30,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-06-05 06:07:30,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:07:30,395 INFO L628 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2021-06-05 06:07:30,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:30,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-06-05 06:07:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:30,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727992097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:30,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:30,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-05 06:07:30,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459268603] [2021-06-05 06:07:30,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:07:30,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:30,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:07:30,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:30,511 INFO L87 Difference]: Start difference. First operand 1043 states and 2619 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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) [2021-06-05 06:07:32,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:32,377 INFO L93 Difference]: Finished difference Result 1498 states and 3593 transitions. [2021-06-05 06:07:32,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:07:32,378 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:32,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:32,380 INFO L225 Difference]: With dead ends: 1498 [2021-06-05 06:07:32,380 INFO L226 Difference]: Without dead ends: 1436 [2021-06-05 06:07:32,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1888.9ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:07:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-06-05 06:07:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1086. [2021-06-05 06:07:32,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.511520737327189) internal successors, (2725), 1085 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2725 transitions. [2021-06-05 06:07:32,395 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2725 transitions. Word has length 26 [2021-06-05 06:07:32,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:32,395 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2725 transitions. [2021-06-05 06:07:32,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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) [2021-06-05 06:07:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2725 transitions. [2021-06-05 06:07:32,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:32,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:32,397 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:32,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 06:07:32,604 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:32,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:32,604 INFO L82 PathProgramCache]: Analyzing trace with hash 609282159, now seen corresponding path program 37 times [2021-06-05 06:07:32,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:32,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667782532] [2021-06-05 06:07:32,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:32,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:32,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:32,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667782532] [2021-06-05 06:07:32,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667782532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:32,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225690736] [2021-06-05 06:07:32,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:32,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:07:32,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:33,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:33,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:33,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:33,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:33,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:33,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 06:07:33,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:33,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:33,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:33,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 06:07:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:33,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225690736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:33,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:33,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 06:07:33,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729554365] [2021-06-05 06:07:33,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:33,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:33,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:33,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:33,078 INFO L87 Difference]: Start difference. First operand 1086 states and 2725 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:34,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:34,252 INFO L93 Difference]: Finished difference Result 1318 states and 3210 transitions. [2021-06-05 06:07:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:07:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:34,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:34,254 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 06:07:34,254 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 06:07:34,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1106.5ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:07:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 06:07:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1112. [2021-06-05 06:07:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.5013501350135012) internal successors, (2779), 1111 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:34,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2779 transitions. [2021-06-05 06:07:34,267 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2779 transitions. Word has length 26 [2021-06-05 06:07:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:34,267 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 2779 transitions. [2021-06-05 06:07:34,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2779 transitions. [2021-06-05 06:07:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 06:07:34,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:34,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:34,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:34,488 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:34,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712627, now seen corresponding path program 38 times [2021-06-05 06:07:34,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:34,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219089994] [2021-06-05 06:07:34,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:34,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:34,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219089994] [2021-06-05 06:07:34,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219089994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:34,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849587763] [2021-06-05 06:07:34,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:34,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:34,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 06:07:34,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:34,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:34,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:34,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:34,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:34,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:34,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:34,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:34,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:34,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-06-05 06:07:34,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:34,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:34,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:34,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-05 06:07:35,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:35,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849587763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:35,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:35,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-05 06:07:35,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214122342] [2021-06-05 06:07:35,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:35,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:35,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:35,012 INFO L87 Difference]: Start difference. First operand 1112 states and 2779 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:36,106 INFO L93 Difference]: Finished difference Result 1252 states and 3057 transitions. [2021-06-05 06:07:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:07:36,107 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 06:07:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:36,109 INFO L225 Difference]: With dead ends: 1252 [2021-06-05 06:07:36,109 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 06:07:36,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1143.4ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:07:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 06:07:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1121. [2021-06-05 06:07:36,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.500892857142857) internal successors, (2801), 1120 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 2801 transitions. [2021-06-05 06:07:36,121 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 2801 transitions. Word has length 26 [2021-06-05 06:07:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:36,121 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 2801 transitions. [2021-06-05 06:07:36,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 2801 transitions. [2021-06-05 06:07:36,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:36,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:36,123 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:36,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:36,337 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:36,337 INFO L82 PathProgramCache]: Analyzing trace with hash -197112851, now seen corresponding path program 39 times [2021-06-05 06:07:36,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:36,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231432535] [2021-06-05 06:07:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:36,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:36,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231432535] [2021-06-05 06:07:36,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231432535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:36,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452370249] [2021-06-05 06:07:36,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:36,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:07:36,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:36,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:36,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452370249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:36,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:36,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 06:07:36,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327274871] [2021-06-05 06:07:36,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:07:36,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:36,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:07:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:07:36,623 INFO L87 Difference]: Start difference. First operand 1121 states and 2801 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:37,307 INFO L93 Difference]: Finished difference Result 1649 states and 3850 transitions. [2021-06-05 06:07:37,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:07:37,307 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:37,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:37,310 INFO L225 Difference]: With dead ends: 1649 [2021-06-05 06:07:37,310 INFO L226 Difference]: Without dead ends: 1649 [2021-06-05 06:07:37,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:07:37,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-05 06:07:37,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1078. [2021-06-05 06:07:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.503249767873723) internal successors, (2696), 1077 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:37,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2696 transitions. [2021-06-05 06:07:37,327 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2696 transitions. Word has length 28 [2021-06-05 06:07:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:37,327 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 2696 transitions. [2021-06-05 06:07:37,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2696 transitions. [2021-06-05 06:07:37,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:37,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:37,329 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:37,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:37,545 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1535197913, now seen corresponding path program 40 times [2021-06-05 06:07:37,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:37,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562672748] [2021-06-05 06:07:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:37,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:37,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:37,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562672748] [2021-06-05 06:07:37,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562672748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:37,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743880822] [2021-06-05 06:07:37,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:37,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:37,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:37,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:37,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:37,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743880822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:37,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:37,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:37,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360410985] [2021-06-05 06:07:37,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:37,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:37,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:37,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:37,778 INFO L87 Difference]: Start difference. First operand 1078 states and 2696 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-06-05 06:07:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:38,703 INFO L93 Difference]: Finished difference Result 2079 states and 4782 transitions. [2021-06-05 06:07:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:07:38,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:38,706 INFO L225 Difference]: With dead ends: 2079 [2021-06-05 06:07:38,706 INFO L226 Difference]: Without dead ends: 2008 [2021-06-05 06:07:38,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 856.8ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:07:38,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-06-05 06:07:38,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1257. [2021-06-05 06:07:38,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.519904458598726) internal successors, (3165), 1256 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) [2021-06-05 06:07:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3165 transitions. [2021-06-05 06:07:38,731 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3165 transitions. Word has length 28 [2021-06-05 06:07:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:38,731 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3165 transitions. [2021-06-05 06:07:38,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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) [2021-06-05 06:07:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3165 transitions. [2021-06-05 06:07:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:38,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:38,733 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:38,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 06:07:38,956 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:38,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:38,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1640834073, now seen corresponding path program 41 times [2021-06-05 06:07:38,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:38,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38630781] [2021-06-05 06:07:38,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:39,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38630781] [2021-06-05 06:07:39,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38630781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:39,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320372240] [2021-06-05 06:07:39,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:39,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:07:39,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:39,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:39,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320372240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:39,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:39,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 06:07:39,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573148438] [2021-06-05 06:07:39,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:39,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:39,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:39,192 INFO L87 Difference]: Start difference. First operand 1257 states and 3165 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 06:07:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:39,991 INFO L93 Difference]: Finished difference Result 2322 states and 5582 transitions. [2021-06-05 06:07:39,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:07:39,992 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:39,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:39,995 INFO L225 Difference]: With dead ends: 2322 [2021-06-05 06:07:39,996 INFO L226 Difference]: Without dead ends: 2316 [2021-06-05 06:07:39,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 715.2ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:07:39,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-05 06:07:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1546. [2021-06-05 06:07:40,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.5372168284789645) internal successors, (3920), 1545 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3920 transitions. [2021-06-05 06:07:40,031 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3920 transitions. Word has length 28 [2021-06-05 06:07:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:40,032 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 3920 transitions. [2021-06-05 06:07:40,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 06:07:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3920 transitions. [2021-06-05 06:07:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:40,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:40,034 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:40,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:40,257 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1972512861, now seen corresponding path program 42 times [2021-06-05 06:07:40,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:40,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942380812] [2021-06-05 06:07:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:40,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:40,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942380812] [2021-06-05 06:07:40,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942380812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:40,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47633567] [2021-06-05 06:07:40,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:40,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:07:40,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:40,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:40,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:40,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47633567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:40,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:40,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 06:07:40,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354732971] [2021-06-05 06:07:40,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:40,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:40,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:40,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:40,469 INFO L87 Difference]: Start difference. First operand 1546 states and 3920 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 06:07:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:41,105 INFO L93 Difference]: Finished difference Result 1833 states and 4458 transitions. [2021-06-05 06:07:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:07:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:41,108 INFO L225 Difference]: With dead ends: 1833 [2021-06-05 06:07:41,108 INFO L226 Difference]: Without dead ends: 1829 [2021-06-05 06:07:41,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 592.7ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:07:41,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-06-05 06:07:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1518. [2021-06-05 06:07:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 2.5392221489782467) internal successors, (3852), 1517 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 3852 transitions. [2021-06-05 06:07:41,132 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 3852 transitions. Word has length 28 [2021-06-05 06:07:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:41,132 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 3852 transitions. [2021-06-05 06:07:41,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 06:07:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 3852 transitions. [2021-06-05 06:07:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:41,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:41,134 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:41,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:41,349 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:41,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:41,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1204854355, now seen corresponding path program 43 times [2021-06-05 06:07:41,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:41,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397297169] [2021-06-05 06:07:41,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:41,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397297169] [2021-06-05 06:07:41,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397297169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:41,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350939656] [2021-06-05 06:07:41,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:41,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:41,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:41,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350939656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:41,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:41,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 06:07:41,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486761909] [2021-06-05 06:07:41,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:41,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:41,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:41,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:41,554 INFO L87 Difference]: Start difference. First operand 1518 states and 3852 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:42,057 INFO L93 Difference]: Finished difference Result 2126 states and 5176 transitions. [2021-06-05 06:07:42,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 06:07:42,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:42,061 INFO L225 Difference]: With dead ends: 2126 [2021-06-05 06:07:42,061 INFO L226 Difference]: Without dead ends: 2117 [2021-06-05 06:07:42,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 06:07:42,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-06-05 06:07:42,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1623. [2021-06-05 06:07:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.553020961775586) internal successors, (4141), 1622 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:42,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4141 transitions. [2021-06-05 06:07:42,091 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4141 transitions. Word has length 28 [2021-06-05 06:07:42,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:42,091 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 4141 transitions. [2021-06-05 06:07:42,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4141 transitions. [2021-06-05 06:07:42,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:42,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:42,093 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:42,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 06:07:42,315 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:42,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:42,316 INFO L82 PathProgramCache]: Analyzing trace with hash -760321333, now seen corresponding path program 44 times [2021-06-05 06:07:42,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:42,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156254260] [2021-06-05 06:07:42,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:42,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:42,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:42,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156254260] [2021-06-05 06:07:42,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156254260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:42,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476899075] [2021-06-05 06:07:42,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:42,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:42,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:42,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:42,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:42,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476899075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:42,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:42,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 06:07:42,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933632560] [2021-06-05 06:07:42,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:42,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:42,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:42,565 INFO L87 Difference]: Start difference. First operand 1623 states and 4141 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 06:07:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:43,227 INFO L93 Difference]: Finished difference Result 2217 states and 5362 transitions. [2021-06-05 06:07:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:07:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:43,231 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 06:07:43,231 INFO L226 Difference]: Without dead ends: 2207 [2021-06-05 06:07:43,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 612.6ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:07:43,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-05 06:07:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1676. [2021-06-05 06:07:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 2.5635820895522388) internal successors, (4294), 1675 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 4294 transitions. [2021-06-05 06:07:43,259 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 4294 transitions. Word has length 28 [2021-06-05 06:07:43,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:43,259 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 4294 transitions. [2021-06-05 06:07:43,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 06:07:43,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 4294 transitions. [2021-06-05 06:07:43,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:43,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:43,261 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:43,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 06:07:43,484 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1047790539, now seen corresponding path program 45 times [2021-06-05 06:07:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:43,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487597595] [2021-06-05 06:07:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:43,546 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:43,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:43,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487597595] [2021-06-05 06:07:43,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487597595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:43,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794920670] [2021-06-05 06:07:43,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:43,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:07:43,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:43,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:43,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:43,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794920670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:43,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:43,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:07:43,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303193665] [2021-06-05 06:07:43,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:43,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:43,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:43,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:43,709 INFO L87 Difference]: Start difference. First operand 1676 states and 4294 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 06:07:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:44,357 INFO L93 Difference]: Finished difference Result 2439 states and 5889 transitions. [2021-06-05 06:07:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:07:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:44,359 INFO L225 Difference]: With dead ends: 2439 [2021-06-05 06:07:44,359 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 06:07:44,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 604.4ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:07:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 06:07:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1598. [2021-06-05 06:07:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.5510331872260488) internal successors, (4074), 1597 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:44,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4074 transitions. [2021-06-05 06:07:44,386 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4074 transitions. Word has length 28 [2021-06-05 06:07:44,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:44,386 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4074 transitions. [2021-06-05 06:07:44,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 06:07:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4074 transitions. [2021-06-05 06:07:44,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:44,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:44,388 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:44,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 06:07:44,610 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:44,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:44,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2093633671, now seen corresponding path program 46 times [2021-06-05 06:07:44,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:44,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686091421] [2021-06-05 06:07:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:44,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686091421] [2021-06-05 06:07:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686091421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388783027] [2021-06-05 06:07:44,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:44,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:44,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:44,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:44,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388783027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:44,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:44,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:44,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470518872] [2021-06-05 06:07:44,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:44,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:44,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:44,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:44,898 INFO L87 Difference]: Start difference. First operand 1598 states and 4074 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:45,600 INFO L93 Difference]: Finished difference Result 2405 states and 5659 transitions. [2021-06-05 06:07:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 06:07:45,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:45,603 INFO L225 Difference]: With dead ends: 2405 [2021-06-05 06:07:45,603 INFO L226 Difference]: Without dead ends: 2405 [2021-06-05 06:07:45,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=765, Invalid=2097, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:07:45,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-05 06:07:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1388. [2021-06-05 06:07:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.5097332372025956) internal successors, (3481), 1387 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3481 transitions. [2021-06-05 06:07:45,620 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3481 transitions. Word has length 28 [2021-06-05 06:07:45,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:45,620 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3481 transitions. [2021-06-05 06:07:45,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3481 transitions. [2021-06-05 06:07:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:45,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:45,622 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:45,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:45,822 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:45,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1416205117, now seen corresponding path program 47 times [2021-06-05 06:07:45,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:45,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598004963] [2021-06-05 06:07:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:45,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:45,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598004963] [2021-06-05 06:07:45,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598004963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:45,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188902175] [2021-06-05 06:07:45,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:45,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 06:07:45,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:45,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:45,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:46,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188902175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:46,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:46,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:07:46,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983617941] [2021-06-05 06:07:46,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:46,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:46,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:46,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:46,100 INFO L87 Difference]: Start difference. First operand 1388 states and 3481 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 06:07:46,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:46,824 INFO L93 Difference]: Finished difference Result 1806 states and 4238 transitions. [2021-06-05 06:07:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:07:46,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:46,826 INFO L225 Difference]: With dead ends: 1806 [2021-06-05 06:07:46,826 INFO L226 Difference]: Without dead ends: 1767 [2021-06-05 06:07:46,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 652.7ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:07:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-05 06:07:46,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1334. [2021-06-05 06:07:46,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 2.495873968492123) internal successors, (3327), 1333 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 3327 transitions. [2021-06-05 06:07:46,843 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 3327 transitions. Word has length 28 [2021-06-05 06:07:46,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:46,843 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 3327 transitions. [2021-06-05 06:07:46,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 06:07:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 3327 transitions. [2021-06-05 06:07:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:46,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:46,845 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:47,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:47,045 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1362767239, now seen corresponding path program 48 times [2021-06-05 06:07:47,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:47,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17179874] [2021-06-05 06:07:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:47,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17179874] [2021-06-05 06:07:47,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17179874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:47,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145302488] [2021-06-05 06:07:47,112 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:47,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:47,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:47,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:47,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:47,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145302488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:47,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:47,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:07:47,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793558865] [2021-06-05 06:07:47,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:47,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:47,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:47,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:47,329 INFO L87 Difference]: Start difference. First operand 1334 states and 3327 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:48,077 INFO L93 Difference]: Finished difference Result 2351 states and 5515 transitions. [2021-06-05 06:07:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:07:48,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:48,079 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 06:07:48,079 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 06:07:48,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 705.1ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:07:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 06:07:48,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1439. [2021-06-05 06:07:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.4714881780250346) internal successors, (3554), 1438 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3554 transitions. [2021-06-05 06:07:48,096 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3554 transitions. Word has length 28 [2021-06-05 06:07:48,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:48,096 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 3554 transitions. [2021-06-05 06:07:48,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3554 transitions. [2021-06-05 06:07:48,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:48,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:48,097 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:48,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:48,298 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:48,298 INFO L82 PathProgramCache]: Analyzing trace with hash -452605191, now seen corresponding path program 49 times [2021-06-05 06:07:48,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:48,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864350637] [2021-06-05 06:07:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:48,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:48,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864350637] [2021-06-05 06:07:48,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864350637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:48,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204131826] [2021-06-05 06:07:48,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:48,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:48,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:48,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204131826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:48,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:48,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 06:07:48,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514481037] [2021-06-05 06:07:48,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:48,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:48,576 INFO L87 Difference]: Start difference. First operand 1439 states and 3554 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 06:07:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:49,164 INFO L93 Difference]: Finished difference Result 1783 states and 4197 transitions. [2021-06-05 06:07:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:07:49,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:49,166 INFO L225 Difference]: With dead ends: 1783 [2021-06-05 06:07:49,166 INFO L226 Difference]: Without dead ends: 1765 [2021-06-05 06:07:49,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:07:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-05 06:07:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1470. [2021-06-05 06:07:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.4751531654186523) internal successors, (3636), 1469 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:49,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 3636 transitions. [2021-06-05 06:07:49,181 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 3636 transitions. Word has length 28 [2021-06-05 06:07:49,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:49,181 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 3636 transitions. [2021-06-05 06:07:49,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 06:07:49,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 3636 transitions. [2021-06-05 06:07:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:49,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:49,183 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:49,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:49,385 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:49,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash 983607605, now seen corresponding path program 50 times [2021-06-05 06:07:49,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:49,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009993748] [2021-06-05 06:07:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:49,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009993748] [2021-06-05 06:07:49,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009993748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:49,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699365125] [2021-06-05 06:07:49,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:49,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:49,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:49,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:49,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:49,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699365125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:49,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:49,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 06:07:49,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929332532] [2021-06-05 06:07:49,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:49,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:49,613 INFO L87 Difference]: Start difference. First operand 1470 states and 3636 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:50,443 INFO L93 Difference]: Finished difference Result 2870 states and 6981 transitions. [2021-06-05 06:07:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:07:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:50,446 INFO L225 Difference]: With dead ends: 2870 [2021-06-05 06:07:50,446 INFO L226 Difference]: Without dead ends: 2870 [2021-06-05 06:07:50,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 744.8ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:07:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-06-05 06:07:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2266. [2021-06-05 06:07:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 2.5527593818984546) internal successors, (5782), 2265 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 5782 transitions. [2021-06-05 06:07:50,472 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 5782 transitions. Word has length 28 [2021-06-05 06:07:50,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:50,472 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 5782 transitions. [2021-06-05 06:07:50,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 5782 transitions. [2021-06-05 06:07:50,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:50,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:50,475 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:50,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 06:07:50,675 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:50,675 INFO L82 PathProgramCache]: Analyzing trace with hash -768473619, now seen corresponding path program 51 times [2021-06-05 06:07:50,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:50,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301945743] [2021-06-05 06:07:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:50,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:50,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301945743] [2021-06-05 06:07:50,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301945743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:50,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54172455] [2021-06-05 06:07:50,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:50,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:07:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:50,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:50,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:50,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54172455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:50,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:50,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 06:07:50,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583604265] [2021-06-05 06:07:50,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 06:07:50,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:50,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 06:07:50,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 06:07:50,901 INFO L87 Difference]: Start difference. First operand 2266 states and 5782 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 06:07:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:51,462 INFO L93 Difference]: Finished difference Result 2793 states and 6806 transitions. [2021-06-05 06:07:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:07:51,463 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:51,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:51,465 INFO L225 Difference]: With dead ends: 2793 [2021-06-05 06:07:51,465 INFO L226 Difference]: Without dead ends: 2789 [2021-06-05 06:07:51,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:07:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-06-05 06:07:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2240. [2021-06-05 06:07:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.5502456453774007) internal successors, (5710), 2239 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5710 transitions. [2021-06-05 06:07:51,490 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5710 transitions. Word has length 28 [2021-06-05 06:07:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:51,490 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5710 transitions. [2021-06-05 06:07:51,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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) [2021-06-05 06:07:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5710 transitions. [2021-06-05 06:07:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:51,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:51,493 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:51,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:51,698 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:51,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:51,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1274819885, now seen corresponding path program 52 times [2021-06-05 06:07:51,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:51,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545807392] [2021-06-05 06:07:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:51,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:51,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545807392] [2021-06-05 06:07:51,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545807392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:51,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68618122] [2021-06-05 06:07:51,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:51,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:07:51,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:51,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:51,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68618122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:51,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:51,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-05 06:07:51,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36978502] [2021-06-05 06:07:51,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 06:07:51,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:51,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 06:07:51,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 06:07:51,931 INFO L87 Difference]: Start difference. First operand 2240 states and 5710 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 06:07:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:52,495 INFO L93 Difference]: Finished difference Result 2987 states and 7280 transitions. [2021-06-05 06:07:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:07:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:52,498 INFO L225 Difference]: With dead ends: 2987 [2021-06-05 06:07:52,498 INFO L226 Difference]: Without dead ends: 2975 [2021-06-05 06:07:52,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:07:52,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-06-05 06:07:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2400. [2021-06-05 06:07:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.5652355147978323) internal successors, (6154), 2399 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6154 transitions. [2021-06-05 06:07:52,527 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6154 transitions. Word has length 28 [2021-06-05 06:07:52,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:52,528 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6154 transitions. [2021-06-05 06:07:52,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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) [2021-06-05 06:07:52,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6154 transitions. [2021-06-05 06:07:52,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:52,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:52,531 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:52,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 06:07:52,746 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1502041265, now seen corresponding path program 53 times [2021-06-05 06:07:52,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:52,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534611678] [2021-06-05 06:07:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:07:52,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:52,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534611678] [2021-06-05 06:07:52,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534611678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:52,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737465519] [2021-06-05 06:07:52,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:07:52,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:07:52,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:52,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737465519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:52,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:52,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-05 06:07:52,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103332915] [2021-06-05 06:07:52,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 06:07:52,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:52,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 06:07:52,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 06:07:52,984 INFO L87 Difference]: Start difference. First operand 2400 states and 6154 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 06:07:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:53,601 INFO L93 Difference]: Finished difference Result 3282 states and 8012 transitions. [2021-06-05 06:07:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:07:53,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:53,604 INFO L225 Difference]: With dead ends: 3282 [2021-06-05 06:07:53,604 INFO L226 Difference]: Without dead ends: 3262 [2021-06-05 06:07:53,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:07:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-06-05 06:07:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2627. [2021-06-05 06:07:53,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.5788271134805787) internal successors, (6772), 2626 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 6772 transitions. [2021-06-05 06:07:53,636 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 6772 transitions. Word has length 28 [2021-06-05 06:07:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:53,636 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 6772 transitions. [2021-06-05 06:07:53,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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) [2021-06-05 06:07:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 6772 transitions. [2021-06-05 06:07:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 06:07:53,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:53,638 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:53,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 06:07:53,839 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:53,839 INFO L82 PathProgramCache]: Analyzing trace with hash -818455349, now seen corresponding path program 54 times [2021-06-05 06:07:53,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:53,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348499234] [2021-06-05 06:07:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:53,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:53,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348499234] [2021-06-05 06:07:53,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348499234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:53,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514581988] [2021-06-05 06:07:53,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:53,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:07:53,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:53,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 06:07:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:54,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:54,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514581988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:54,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:54,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 06:07:54,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489066659] [2021-06-05 06:07:54,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:07:54,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:54,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:07:54,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:07:54,115 INFO L87 Difference]: Start difference. First operand 2627 states and 6772 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:54,863 INFO L93 Difference]: Finished difference Result 3390 states and 8366 transitions. [2021-06-05 06:07:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:07:54,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 06:07:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:54,868 INFO L225 Difference]: With dead ends: 3390 [2021-06-05 06:07:54,868 INFO L226 Difference]: Without dead ends: 3362 [2021-06-05 06:07:54,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:07:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-06-05 06:07:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2800. [2021-06-05 06:07:54,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.5862808145766345) internal successors, (7239), 2799 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:54,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 7239 transitions. [2021-06-05 06:07:54,907 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 7239 transitions. Word has length 28 [2021-06-05 06:07:54,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:54,907 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 7239 transitions. [2021-06-05 06:07:54,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 7239 transitions. [2021-06-05 06:07:54,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:07:54,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:54,910 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:55,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:55,122 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash -40043611, now seen corresponding path program 55 times [2021-06-05 06:07:55,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:55,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160952485] [2021-06-05 06:07:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:55,406 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:55,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:55,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160952485] [2021-06-05 06:07:55,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160952485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:55,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561195703] [2021-06-05 06:07:55,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:55,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:55,431 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:07:55,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:55,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:55,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:55,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:55,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:55,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:55,733 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 69 treesize of output 7 [2021-06-05 06:07:55,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:55,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:55,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:55,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:07:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:55,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561195703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:55,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:55,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:07:55,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206619755] [2021-06-05 06:07:55,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:07:55,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:55,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:07:55,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:55,762 INFO L87 Difference]: Start difference. First operand 2800 states and 7239 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:07:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:57,510 INFO L93 Difference]: Finished difference Result 3814 states and 9580 transitions. [2021-06-05 06:07:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:07:57,510 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 30 [2021-06-05 06:07:57,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:57,514 INFO L225 Difference]: With dead ends: 3814 [2021-06-05 06:07:57,514 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 06:07:57,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1606.5ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:07:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 06:07:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2859. [2021-06-05 06:07:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.5878236529041287) internal successors, (7396), 2858 states have internal predecessors, (7396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 7396 transitions. [2021-06-05 06:07:57,546 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 7396 transitions. Word has length 30 [2021-06-05 06:07:57,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:57,546 INFO L482 AbstractCegarLoop]: Abstraction has 2859 states and 7396 transitions. [2021-06-05 06:07:57,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:07:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 7396 transitions. [2021-06-05 06:07:57,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:07:57,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:57,550 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:07:57,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 06:07:57,771 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:07:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:07:57,771 INFO L82 PathProgramCache]: Analyzing trace with hash -476580429, now seen corresponding path program 56 times [2021-06-05 06:07:57,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:07:57,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829800275] [2021-06-05 06:07:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:07:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:07:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:58,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:07:58,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829800275] [2021-06-05 06:07:58,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829800275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:58,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130823505] [2021-06-05 06:07:58,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:07:58,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:07:58,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:07:58,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:07:58,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:07:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:58,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:58,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:07:58,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:58,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:07:58,431 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 69 treesize of output 7 [2021-06-05 06:07:58,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:07:58,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:07:58,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:07:58,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:07:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:07:58,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130823505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:07:58,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:07:58,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:07:58,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543456749] [2021-06-05 06:07:58,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:07:58,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:07:58,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:07:58,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:07:58,457 INFO L87 Difference]: Start difference. First operand 2859 states and 7396 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:07:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:07:59,785 INFO L93 Difference]: Finished difference Result 3790 states and 9553 transitions. [2021-06-05 06:07:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:07:59,786 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 30 [2021-06-05 06:07:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:07:59,788 INFO L225 Difference]: With dead ends: 3790 [2021-06-05 06:07:59,789 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 06:07:59,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1392.3ms TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 06:07:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 06:07:59,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 2912. [2021-06-05 06:07:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 2.5774647887323945) internal successors, (7503), 2911 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:07:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7503 transitions. [2021-06-05 06:07:59,820 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7503 transitions. Word has length 30 [2021-06-05 06:07:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:07:59,820 INFO L482 AbstractCegarLoop]: Abstraction has 2912 states and 7503 transitions. [2021-06-05 06:07:59,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:07:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7503 transitions. [2021-06-05 06:07:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:07:59,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:07:59,823 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:00,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:00,024 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:00,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1012771695, now seen corresponding path program 57 times [2021-06-05 06:08:00,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:00,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73078090] [2021-06-05 06:08:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:00,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:00,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73078090] [2021-06-05 06:08:00,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73078090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:00,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162864348] [2021-06-05 06:08:00,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:00,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:08:00,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:00,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:08:00,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:00,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:00,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:00,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:00,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:00,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:00,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:00,914 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:00,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-06-05 06:08:01,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-05 06:08:01,488 INFO L628 ElimStorePlain]: treesize reduction 286, result has 10.9 percent of original size [2021-06-05 06:08:01,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:08:01,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-06-05 06:08:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:01,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162864348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:01,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:01,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 06:08:01,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23177806] [2021-06-05 06:08:01,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:08:01,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:01,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:08:01,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:08:01,564 INFO L87 Difference]: Start difference. First operand 2912 states and 7503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-06-05 06:08:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:03,345 INFO L93 Difference]: Finished difference Result 3918 states and 9829 transitions. [2021-06-05 06:08:03,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:08:03,346 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 30 [2021-06-05 06:08:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:03,349 INFO L225 Difference]: With dead ends: 3918 [2021-06-05 06:08:03,349 INFO L226 Difference]: Without dead ends: 3872 [2021-06-05 06:08:03,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1739.0ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:08:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-06-05 06:08:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2956. [2021-06-05 06:08:03,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.572250423011844) internal successors, (7601), 2955 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:03,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7601 transitions. [2021-06-05 06:08:03,379 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7601 transitions. Word has length 30 [2021-06-05 06:08:03,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:03,380 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7601 transitions. [2021-06-05 06:08:03,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-06-05 06:08:03,380 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7601 transitions. [2021-06-05 06:08:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:03,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:03,382 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:03,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-05 06:08:03,583 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:03,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:03,584 INFO L82 PathProgramCache]: Analyzing trace with hash 290299947, now seen corresponding path program 58 times [2021-06-05 06:08:03,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:03,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189232827] [2021-06-05 06:08:03,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:03,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:03,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189232827] [2021-06-05 06:08:03,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189232827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:03,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316498688] [2021-06-05 06:08:03,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:08:03,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:03,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:03,906 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:03,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:04,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:04,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:04,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:04,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:04,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:04,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:04,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:04,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:04,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:04,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:04,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:04,156 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 69 treesize of output 7 [2021-06-05 06:08:04,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:04,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:04,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:04,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:04,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316498688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:04,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:04,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:08:04,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638265754] [2021-06-05 06:08:04,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:04,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:04,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:04,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:04,180 INFO L87 Difference]: Start difference. First operand 2956 states and 7601 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:08:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:05,696 INFO L93 Difference]: Finished difference Result 4132 states and 10315 transitions. [2021-06-05 06:08:05,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:08:05,696 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 30 [2021-06-05 06:08:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:05,700 INFO L225 Difference]: With dead ends: 4132 [2021-06-05 06:08:05,700 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 06:08:05,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1456.8ms TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:08:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 06:08:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3044. [2021-06-05 06:08:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 2.5626026947091685) internal successors, (7798), 3043 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 7798 transitions. [2021-06-05 06:08:05,751 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 7798 transitions. Word has length 30 [2021-06-05 06:08:05,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:05,751 INFO L482 AbstractCegarLoop]: Abstraction has 3044 states and 7798 transitions. [2021-06-05 06:08:05,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:08:05,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 7798 transitions. [2021-06-05 06:08:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:05,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:05,754 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:05,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:05,969 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1779723289, now seen corresponding path program 59 times [2021-06-05 06:08:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:05,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348322810] [2021-06-05 06:08:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:06,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:06,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:06,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348322810] [2021-06-05 06:08:06,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348322810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:06,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897581233] [2021-06-05 06:08:06,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:06,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:08:06,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:06,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:06,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:06,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:06,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:06,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:06,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:06,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:06,582 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 69 treesize of output 7 [2021-06-05 06:08:06,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:06,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:06,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:06,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:06,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897581233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:06,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:06,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:08:06,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391881689] [2021-06-05 06:08:06,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:06,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:06,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:06,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:06,609 INFO L87 Difference]: Start difference. First operand 3044 states and 7798 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:08:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:08,496 INFO L93 Difference]: Finished difference Result 4375 states and 10858 transitions. [2021-06-05 06:08:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:08:08,496 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 30 [2021-06-05 06:08:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:08,500 INFO L225 Difference]: With dead ends: 4375 [2021-06-05 06:08:08,500 INFO L226 Difference]: Without dead ends: 4366 [2021-06-05 06:08:08,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1819.1ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:08:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-06-05 06:08:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3065. [2021-06-05 06:08:08,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5682114882506526) internal successors, (7869), 3064 states have internal predecessors, (7869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:08,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7869 transitions. [2021-06-05 06:08:08,538 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7869 transitions. Word has length 30 [2021-06-05 06:08:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:08,538 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 7869 transitions. [2021-06-05 06:08:08,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:08:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7869 transitions. [2021-06-05 06:08:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:08,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:08,542 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:08,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 06:08:08,742 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash -110703891, now seen corresponding path program 60 times [2021-06-05 06:08:08,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:08,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323547821] [2021-06-05 06:08:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:09,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:09,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323547821] [2021-06-05 06:08:09,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323547821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:09,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621830982] [2021-06-05 06:08:09,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:09,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:08:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:09,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:09,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:09,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:09,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:09,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:09,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:09,411 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 69 treesize of output 7 [2021-06-05 06:08:09,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:09,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:09,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:09,419 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:09,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621830982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:09,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:09,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:08:09,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069116037] [2021-06-05 06:08:09,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:08:09,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:09,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:08:09,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:09,441 INFO L87 Difference]: Start difference. First operand 3065 states and 7869 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-06-05 06:08:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:11,137 INFO L93 Difference]: Finished difference Result 4391 states and 10936 transitions. [2021-06-05 06:08:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 06:08:11,137 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 30 [2021-06-05 06:08:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:11,141 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 06:08:11,141 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 06:08:11,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1626.7ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:08:11,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 06:08:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3212. [2021-06-05 06:08:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 2.5580815945188413) internal successors, (8214), 3211 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 8214 transitions. [2021-06-05 06:08:11,181 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 8214 transitions. Word has length 30 [2021-06-05 06:08:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:11,181 INFO L482 AbstractCegarLoop]: Abstraction has 3212 states and 8214 transitions. [2021-06-05 06:08:11,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-06-05 06:08:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 8214 transitions. [2021-06-05 06:08:11,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:11,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:11,185 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:11,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 06:08:11,385 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:11,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:11,385 INFO L82 PathProgramCache]: Analyzing trace with hash -416965491, now seen corresponding path program 61 times [2021-06-05 06:08:11,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:11,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808246849] [2021-06-05 06:08:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:11,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:11,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808246849] [2021-06-05 06:08:11,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808246849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:11,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602304448] [2021-06-05 06:08:11,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:11,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:11,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:11,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:11,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:11,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:11,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:11,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:11,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:11,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:11,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:11,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:11,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:11,916 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 69 treesize of output 7 [2021-06-05 06:08:11,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:11,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:11,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:11,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602304448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:11,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:11,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:08:11,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937663786] [2021-06-05 06:08:11,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:11,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:11,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:11,942 INFO L87 Difference]: Start difference. First operand 3212 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:13,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:13,459 INFO L93 Difference]: Finished difference Result 3557 states and 8936 transitions. [2021-06-05 06:08:13,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:08:13,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:08:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:13,463 INFO L225 Difference]: With dead ends: 3557 [2021-06-05 06:08:13,463 INFO L226 Difference]: Without dead ends: 3530 [2021-06-05 06:08:13,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1437.5ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:08:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-06-05 06:08:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3247. [2021-06-05 06:08:13,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 2.5523721503388788) internal successors, (8285), 3246 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 8285 transitions. [2021-06-05 06:08:13,493 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 8285 transitions. Word has length 30 [2021-06-05 06:08:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:13,493 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 8285 transitions. [2021-06-05 06:08:13,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 8285 transitions. [2021-06-05 06:08:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:13,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:13,497 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:13,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 06:08:13,697 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:13,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:13,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1763395665, now seen corresponding path program 62 times [2021-06-05 06:08:13,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:13,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047030523] [2021-06-05 06:08:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:13,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:13,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047030523] [2021-06-05 06:08:13,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047030523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:13,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065070829] [2021-06-05 06:08:13,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:13,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:13,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:13,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:14,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:14,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:14,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:14,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:14,312 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 69 treesize of output 7 [2021-06-05 06:08:14,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:14,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:14,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:14,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:14,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065070829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:14,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:14,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:08:14,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024166592] [2021-06-05 06:08:14,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:08:14,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:08:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:14,337 INFO L87 Difference]: Start difference. First operand 3247 states and 8285 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-06-05 06:08:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:15,635 INFO L93 Difference]: Finished difference Result 4594 states and 11363 transitions. [2021-06-05 06:08:15,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:08:15,636 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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 30 [2021-06-05 06:08:15,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:15,639 INFO L225 Difference]: With dead ends: 4594 [2021-06-05 06:08:15,639 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 06:08:15,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1392.6ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:08:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 06:08:15,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3260. [2021-06-05 06:08:15,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.5477140227063515) internal successors, (8303), 3259 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 8303 transitions. [2021-06-05 06:08:15,674 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 8303 transitions. Word has length 30 [2021-06-05 06:08:15,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:15,674 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 8303 transitions. [2021-06-05 06:08:15,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 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) [2021-06-05 06:08:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 8303 transitions. [2021-06-05 06:08:15,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:15,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:15,678 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:15,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 06:08:15,878 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:15,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1372978863, now seen corresponding path program 63 times [2021-06-05 06:08:15,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:15,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665165450] [2021-06-05 06:08:15,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:08:16,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:16,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665165450] [2021-06-05 06:08:16,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665165450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:16,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628945881] [2021-06-05 06:08:16,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:16,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:08:16,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:16,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 06:08:16,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:16,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:16,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:16,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:16,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 151 [2021-06-05 06:08:16,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 06:08:16,834 INFO L628 ElimStorePlain]: treesize reduction 56, result has 40.4 percent of original size [2021-06-05 06:08:16,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:16,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:74 [2021-06-05 06:08:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:16,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628945881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:16,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:16,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 06:08:16,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742464870] [2021-06-05 06:08:16,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:08:16,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:16,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:08:16,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:08:16,978 INFO L87 Difference]: Start difference. First operand 3260 states and 8303 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) [2021-06-05 06:08:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:20,115 INFO L93 Difference]: Finished difference Result 4752 states and 11666 transitions. [2021-06-05 06:08:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 06:08:20,115 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 30 [2021-06-05 06:08:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:20,119 INFO L225 Difference]: With dead ends: 4752 [2021-06-05 06:08:20,119 INFO L226 Difference]: Without dead ends: 4721 [2021-06-05 06:08:20,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 2982.3ms TimeCoverageRelationStatistics Valid=917, Invalid=6565, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 06:08:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-06-05 06:08:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 3277. [2021-06-05 06:08:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 2.5467032967032965) internal successors, (8343), 3276 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 8343 transitions. [2021-06-05 06:08:20,171 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 8343 transitions. Word has length 30 [2021-06-05 06:08:20,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:20,171 INFO L482 AbstractCegarLoop]: Abstraction has 3277 states and 8343 transitions. [2021-06-05 06:08:20,171 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) [2021-06-05 06:08:20,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 8343 transitions. [2021-06-05 06:08:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:20,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:20,175 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:20,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 06:08:20,388 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash 156127441, now seen corresponding path program 64 times [2021-06-05 06:08:20,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:20,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318430064] [2021-06-05 06:08:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:08:20,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:20,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318430064] [2021-06-05 06:08:20,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318430064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:20,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857861626] [2021-06-05 06:08:20,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:20,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:20,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:20,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:20,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:20,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:20,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:20,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:20,905 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 69 treesize of output 7 [2021-06-05 06:08:20,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:20,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:20,911 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:20,911 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:20,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857861626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:20,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:20,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:08:20,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419419197] [2021-06-05 06:08:20,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:20,930 INFO L87 Difference]: Start difference. First operand 3277 states and 8343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2021-06-05 06:08:22,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:22,456 INFO L93 Difference]: Finished difference Result 3751 states and 9329 transitions. [2021-06-05 06:08:22,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:08:22,457 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 30 [2021-06-05 06:08:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:22,461 INFO L225 Difference]: With dead ends: 3751 [2021-06-05 06:08:22,461 INFO L226 Difference]: Without dead ends: 3733 [2021-06-05 06:08:22,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1471.9ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:08:22,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-06-05 06:08:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3270. [2021-06-05 06:08:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 2.5457326399510554) internal successors, (8322), 3269 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 8322 transitions. [2021-06-05 06:08:22,495 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 8322 transitions. Word has length 30 [2021-06-05 06:08:22,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:22,495 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 8322 transitions. [2021-06-05 06:08:22,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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) [2021-06-05 06:08:22,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 8322 transitions. [2021-06-05 06:08:22,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:22,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:22,498 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:22,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2021-06-05 06:08:22,698 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1969334097, now seen corresponding path program 65 times [2021-06-05 06:08:22,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:22,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252189270] [2021-06-05 06:08:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:22,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:22,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:22,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252189270] [2021-06-05 06:08:22,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252189270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:22,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662183364] [2021-06-05 06:08:22,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:22,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:08:22,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:22,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:22,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:23,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:23,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:23,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:23,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:23,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:23,270 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 69 treesize of output 7 [2021-06-05 06:08:23,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:23,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:23,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:23,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:23,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662183364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:23,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:23,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:08:23,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875710416] [2021-06-05 06:08:23,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:08:23,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:23,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:08:23,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:23,329 INFO L87 Difference]: Start difference. First operand 3270 states and 8322 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-06-05 06:08:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:24,162 INFO L93 Difference]: Finished difference Result 3590 states and 8850 transitions. [2021-06-05 06:08:24,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 06:08:24,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 30 [2021-06-05 06:08:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:24,166 INFO L225 Difference]: With dead ends: 3590 [2021-06-05 06:08:24,166 INFO L226 Difference]: Without dead ends: 3563 [2021-06-05 06:08:24,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 864.5ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 06:08:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-05 06:08:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3273. [2021-06-05 06:08:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.5403422982885084) internal successors, (8312), 3272 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 8312 transitions. [2021-06-05 06:08:24,221 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 8312 transitions. Word has length 30 [2021-06-05 06:08:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:24,221 INFO L482 AbstractCegarLoop]: Abstraction has 3273 states and 8312 transitions. [2021-06-05 06:08:24,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-06-05 06:08:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 8312 transitions. [2021-06-05 06:08:24,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:24,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:24,224 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:24,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:24,441 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash 255609963, now seen corresponding path program 66 times [2021-06-05 06:08:24,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:24,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204389724] [2021-06-05 06:08:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:24,667 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:24,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:24,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204389724] [2021-06-05 06:08:24,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204389724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:24,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933861123] [2021-06-05 06:08:24,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:24,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:08:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:24,692 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:08:24,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:25,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:25,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:25,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:25,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:25,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:25,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:25,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:25,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:25,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-06-05 06:08:25,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:08:25,272 INFO L628 ElimStorePlain]: treesize reduction 92, result has 29.2 percent of original size [2021-06-05 06:08:25,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:25,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-06-05 06:08:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:25,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933861123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:25,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:25,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 06:08:25,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940292788] [2021-06-05 06:08:25,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:08:25,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:25,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:08:25,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:08:25,393 INFO L87 Difference]: Start difference. First operand 3273 states and 8312 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) [2021-06-05 06:08:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:27,942 INFO L93 Difference]: Finished difference Result 4934 states and 12188 transitions. [2021-06-05 06:08:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:08:27,942 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 30 [2021-06-05 06:08:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:27,947 INFO L225 Difference]: With dead ends: 4934 [2021-06-05 06:08:27,947 INFO L226 Difference]: Without dead ends: 4898 [2021-06-05 06:08:27,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2567.7ms TimeCoverageRelationStatistics Valid=851, Invalid=3979, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 06:08:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-05 06:08:27,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 3309. [2021-06-05 06:08:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 2.557738814993954) internal successors, (8461), 3308 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 8461 transitions. [2021-06-05 06:08:27,990 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 8461 transitions. Word has length 30 [2021-06-05 06:08:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:27,990 INFO L482 AbstractCegarLoop]: Abstraction has 3309 states and 8461 transitions. [2021-06-05 06:08:27,990 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) [2021-06-05 06:08:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 8461 transitions. [2021-06-05 06:08:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:27,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:27,993 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:28,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:28,197 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:28,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:28,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1475159769, now seen corresponding path program 67 times [2021-06-05 06:08:28,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:28,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76791392] [2021-06-05 06:08:28,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:28,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:28,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76791392] [2021-06-05 06:08:28,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76791392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:28,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150113950] [2021-06-05 06:08:28,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:28,451 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:28,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:28,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:28,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:28,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:28,679 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 69 treesize of output 7 [2021-06-05 06:08:28,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:28,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:28,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:28,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150113950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:28,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:28,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:08:28,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308902010] [2021-06-05 06:08:28,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:08:28,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:28,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:08:28,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:28,704 INFO L87 Difference]: Start difference. First operand 3309 states and 8461 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:08:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:30,197 INFO L93 Difference]: Finished difference Result 3897 states and 9765 transitions. [2021-06-05 06:08:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:08:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-06-05 06:08:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:30,201 INFO L225 Difference]: With dead ends: 3897 [2021-06-05 06:08:30,201 INFO L226 Difference]: Without dead ends: 3871 [2021-06-05 06:08:30,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1365.2ms TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:08:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-05 06:08:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3131. [2021-06-05 06:08:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 2.537699680511182) internal successors, (7943), 3130 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 7943 transitions. [2021-06-05 06:08:30,235 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 7943 transitions. Word has length 30 [2021-06-05 06:08:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:30,235 INFO L482 AbstractCegarLoop]: Abstraction has 3131 states and 7943 transitions. [2021-06-05 06:08:30,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:08:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 7943 transitions. [2021-06-05 06:08:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:30,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:30,238 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:30,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 06:08:30,438 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash 921316715, now seen corresponding path program 68 times [2021-06-05 06:08:30,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:30,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974644173] [2021-06-05 06:08:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:30,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:30,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:30,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974644173] [2021-06-05 06:08:30,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974644173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:30,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204735985] [2021-06-05 06:08:30,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:30,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:30,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:30,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:31,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:31,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:31,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:31,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:31,011 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 69 treesize of output 7 [2021-06-05 06:08:31,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:31,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:31,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:31,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:31,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204735985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:31,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:31,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:08:31,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974962317] [2021-06-05 06:08:31,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:08:31,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:31,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:08:31,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:31,036 INFO L87 Difference]: Start difference. First operand 3131 states and 7943 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:08:32,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:32,853 INFO L93 Difference]: Finished difference Result 3917 states and 9722 transitions. [2021-06-05 06:08:32,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:08:32,853 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-06-05 06:08:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:32,857 INFO L225 Difference]: With dead ends: 3917 [2021-06-05 06:08:32,857 INFO L226 Difference]: Without dead ends: 3891 [2021-06-05 06:08:32,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1607.4ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 06:08:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-06-05 06:08:32,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3229. [2021-06-05 06:08:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3228 states have (on average 2.537174721189591) internal successors, (8190), 3228 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 8190 transitions. [2021-06-05 06:08:32,891 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 8190 transitions. Word has length 30 [2021-06-05 06:08:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:32,891 INFO L482 AbstractCegarLoop]: Abstraction has 3229 states and 8190 transitions. [2021-06-05 06:08:32,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:08:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 8190 transitions. [2021-06-05 06:08:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:32,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:32,908 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:33,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 06:08:33,108 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:33,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:33,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2116019763, now seen corresponding path program 69 times [2021-06-05 06:08:33,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:33,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003321751] [2021-06-05 06:08:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:33,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:33,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003321751] [2021-06-05 06:08:33,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003321751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:33,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625510006] [2021-06-05 06:08:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:33,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:08:33,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:33,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:08:33,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:33,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:33,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:33,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:33,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:33,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:33,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-06-05 06:08:34,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:08:34,498 INFO L628 ElimStorePlain]: treesize reduction 387, result has 8.9 percent of original size [2021-06-05 06:08:34,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:34,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-06-05 06:08:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:34,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625510006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:34,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:34,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 06:08:34,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929070617] [2021-06-05 06:08:34,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:08:34,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:08:34,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:08:34,628 INFO L87 Difference]: Start difference. First operand 3229 states and 8190 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) [2021-06-05 06:08:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:38,209 INFO L93 Difference]: Finished difference Result 4685 states and 11648 transitions. [2021-06-05 06:08:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 06:08:38,209 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 30 [2021-06-05 06:08:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:38,214 INFO L225 Difference]: With dead ends: 4685 [2021-06-05 06:08:38,214 INFO L226 Difference]: Without dead ends: 4633 [2021-06-05 06:08:38,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3276.7ms TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:08:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-06-05 06:08:38,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3370. [2021-06-05 06:08:38,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 2.553873552983081) internal successors, (8604), 3369 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:38,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 8604 transitions. [2021-06-05 06:08:38,252 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 8604 transitions. Word has length 30 [2021-06-05 06:08:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:38,252 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 8604 transitions. [2021-06-05 06:08:38,252 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) [2021-06-05 06:08:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 8604 transitions. [2021-06-05 06:08:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:38,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:38,255 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:38,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 06:08:38,455 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1215646195, now seen corresponding path program 70 times [2021-06-05 06:08:38,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:38,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336348172] [2021-06-05 06:08:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:38,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:38,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336348172] [2021-06-05 06:08:38,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336348172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:38,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471566328] [2021-06-05 06:08:38,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:38,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:38,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:38,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:39,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:39,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:39,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:39,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:39,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:39,062 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 69 treesize of output 7 [2021-06-05 06:08:39,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:39,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:39,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:39,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:39,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471566328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:39,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:39,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:08:39,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261288222] [2021-06-05 06:08:39,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:08:39,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:08:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:39,086 INFO L87 Difference]: Start difference. First operand 3370 states and 8604 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-06-05 06:08:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:40,270 INFO L93 Difference]: Finished difference Result 3767 states and 9411 transitions. [2021-06-05 06:08:40,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 06:08:40,270 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 30 [2021-06-05 06:08:40,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:40,274 INFO L225 Difference]: With dead ends: 3767 [2021-06-05 06:08:40,274 INFO L226 Difference]: Without dead ends: 3736 [2021-06-05 06:08:40,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1271.6ms TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 06:08:40,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-05 06:08:40,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3431. [2021-06-05 06:08:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 2.53731778425656) internal successors, (8703), 3430 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:40,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 8703 transitions. [2021-06-05 06:08:40,315 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 8703 transitions. Word has length 30 [2021-06-05 06:08:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:40,316 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 8703 transitions. [2021-06-05 06:08:40,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-06-05 06:08:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 8703 transitions. [2021-06-05 06:08:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:40,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:40,319 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:40,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:40,519 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:40,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:40,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1042549111, now seen corresponding path program 71 times [2021-06-05 06:08:40,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:40,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134656002] [2021-06-05 06:08:40,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:40,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:40,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134656002] [2021-06-05 06:08:40,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134656002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:40,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063372331] [2021-06-05 06:08:40,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:08:40,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:08:40,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:40,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:40,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:41,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:41,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:41,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:41,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:41,052 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 69 treesize of output 7 [2021-06-05 06:08:41,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:41,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:41,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:41,058 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:41,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063372331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:41,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:41,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:08:41,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154306831] [2021-06-05 06:08:41,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:08:41,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:41,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:08:41,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:08:41,076 INFO L87 Difference]: Start difference. First operand 3431 states and 8703 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:08:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:42,463 INFO L93 Difference]: Finished difference Result 4784 states and 11766 transitions. [2021-06-05 06:08:42,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:08:42,463 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 30 [2021-06-05 06:08:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:42,467 INFO L225 Difference]: With dead ends: 4784 [2021-06-05 06:08:42,468 INFO L226 Difference]: Without dead ends: 4733 [2021-06-05 06:08:42,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1274.8ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:08:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-06-05 06:08:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 3433. [2021-06-05 06:08:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 2.5367132867132867) internal successors, (8706), 3432 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 8706 transitions. [2021-06-05 06:08:42,514 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 8706 transitions. Word has length 30 [2021-06-05 06:08:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:42,514 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 8706 transitions. [2021-06-05 06:08:42,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:08:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 8706 transitions. [2021-06-05 06:08:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:42,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:42,517 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:42,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 06:08:42,718 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 190286455, now seen corresponding path program 72 times [2021-06-05 06:08:42,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:42,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307843512] [2021-06-05 06:08:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:43,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:43,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307843512] [2021-06-05 06:08:43,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307843512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:43,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114306650] [2021-06-05 06:08:43,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:43,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:08:43,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:43,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:08:43,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:43,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:43,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:43,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:43,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:43,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:43,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:43,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:43,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:43,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:43,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-06-05 06:08:43,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:08:43,497 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-06-05 06:08:43,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:43,503 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-06-05 06:08:43,602 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:43,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114306650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:43,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:43,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 06:08:43,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654895935] [2021-06-05 06:08:43,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:08:43,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:08:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:08:43,603 INFO L87 Difference]: Start difference. First operand 3433 states and 8706 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) [2021-06-05 06:08:46,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:46,326 INFO L93 Difference]: Finished difference Result 4909 states and 12103 transitions. [2021-06-05 06:08:46,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 06:08:46,326 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 30 [2021-06-05 06:08:46,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:46,331 INFO L225 Difference]: With dead ends: 4909 [2021-06-05 06:08:46,331 INFO L226 Difference]: Without dead ends: 4866 [2021-06-05 06:08:46,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2756.3ms TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 06:08:46,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-05 06:08:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3622. [2021-06-05 06:08:46,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 2.528030930682132) internal successors, (9154), 3621 states have internal predecessors, (9154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 9154 transitions. [2021-06-05 06:08:46,383 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 9154 transitions. Word has length 30 [2021-06-05 06:08:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:46,384 INFO L482 AbstractCegarLoop]: Abstraction has 3622 states and 9154 transitions. [2021-06-05 06:08:46,384 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) [2021-06-05 06:08:46,384 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 9154 transitions. [2021-06-05 06:08:46,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:46,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:46,388 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:46,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:46,588 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:46,588 INFO L82 PathProgramCache]: Analyzing trace with hash 760018863, now seen corresponding path program 73 times [2021-06-05 06:08:46,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:46,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997232409] [2021-06-05 06:08:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:46,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:46,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997232409] [2021-06-05 06:08:46,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997232409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:46,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925216332] [2021-06-05 06:08:46,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:46,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:47,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:47,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:47,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:47,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:47,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:47,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:47,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:47,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:47,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:47,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:47,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:47,071 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 69 treesize of output 7 [2021-06-05 06:08:47,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:47,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:47,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:47,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:47,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:47,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925216332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:47,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:47,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:08:47,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373306942] [2021-06-05 06:08:47,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:47,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:47,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:47,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:47,095 INFO L87 Difference]: Start difference. First operand 3622 states and 9154 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 06:08:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:48,395 INFO L93 Difference]: Finished difference Result 3927 states and 9781 transitions. [2021-06-05 06:08:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:08:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 30 [2021-06-05 06:08:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:48,400 INFO L225 Difference]: With dead ends: 3927 [2021-06-05 06:08:48,400 INFO L226 Difference]: Without dead ends: 3899 [2021-06-05 06:08:48,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1289.0ms TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:08:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2021-06-05 06:08:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3664. [2021-06-05 06:08:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 2.5263445263445266) internal successors, (9254), 3663 states have internal predecessors, (9254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:48,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 9254 transitions. [2021-06-05 06:08:48,438 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 9254 transitions. Word has length 30 [2021-06-05 06:08:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:48,438 INFO L482 AbstractCegarLoop]: Abstraction has 3664 states and 9254 transitions. [2021-06-05 06:08:48,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 06:08:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 9254 transitions. [2021-06-05 06:08:48,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:48,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:48,441 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:48,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 06:08:48,642 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:48,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:48,642 INFO L82 PathProgramCache]: Analyzing trace with hash -224198605, now seen corresponding path program 74 times [2021-06-05 06:08:48,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:48,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635051258] [2021-06-05 06:08:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:48,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:48,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:48,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635051258] [2021-06-05 06:08:48,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635051258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:48,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78431428] [2021-06-05 06:08:48,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:48,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:08:48,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:48,877 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:48,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:49,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:49,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:49,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:49,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:49,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:49,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:49,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:49,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:49,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:49,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:49,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:49,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:49,112 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 69 treesize of output 7 [2021-06-05 06:08:49,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:49,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:49,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:49,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:49,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78431428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:49,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:49,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:08:49,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156442257] [2021-06-05 06:08:49,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:49,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:49,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:49,136 INFO L87 Difference]: Start difference. First operand 3664 states and 9254 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 06:08:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:50,002 INFO L93 Difference]: Finished difference Result 4402 states and 10861 transitions. [2021-06-05 06:08:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 06:08:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 30 [2021-06-05 06:08:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:50,006 INFO L225 Difference]: With dead ends: 4402 [2021-06-05 06:08:50,006 INFO L226 Difference]: Without dead ends: 4365 [2021-06-05 06:08:50,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 824.0ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 06:08:50,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-06-05 06:08:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 3871. [2021-06-05 06:08:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.5322997416020674) internal successors, (9800), 3870 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:50,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 9800 transitions. [2021-06-05 06:08:50,053 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 9800 transitions. Word has length 30 [2021-06-05 06:08:50,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:50,053 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 9800 transitions. [2021-06-05 06:08:50,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 06:08:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 9800 transitions. [2021-06-05 06:08:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:50,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:50,058 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:50,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 06:08:50,258 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2000745455, now seen corresponding path program 75 times [2021-06-05 06:08:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:50,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221806054] [2021-06-05 06:08:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:50,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:50,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221806054] [2021-06-05 06:08:50,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221806054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:50,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650899207] [2021-06-05 06:08:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:50,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:08:50,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:50,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:08:50,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:50,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:50,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:50,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:51,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:51,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 157 [2021-06-05 06:08:51,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:08:51,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:51,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:51,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:46 [2021-06-05 06:08:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:51,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650899207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:51,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:51,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 06:08:51,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545104159] [2021-06-05 06:08:51,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:08:51,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:51,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:08:51,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:08:51,246 INFO L87 Difference]: Start difference. First operand 3871 states and 9800 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) [2021-06-05 06:08:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:53,692 INFO L93 Difference]: Finished difference Result 4724 states and 11672 transitions. [2021-06-05 06:08:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:08:53,693 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 30 [2021-06-05 06:08:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:53,697 INFO L225 Difference]: With dead ends: 4724 [2021-06-05 06:08:53,697 INFO L226 Difference]: Without dead ends: 4685 [2021-06-05 06:08:53,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2402.9ms TimeCoverageRelationStatistics Valid=538, Invalid=4154, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:08:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2021-06-05 06:08:53,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4113. [2021-06-05 06:08:53,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.524805447470817) internal successors, (10382), 4112 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 10382 transitions. [2021-06-05 06:08:53,749 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 10382 transitions. Word has length 30 [2021-06-05 06:08:53,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:53,750 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 10382 transitions. [2021-06-05 06:08:53,750 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) [2021-06-05 06:08:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 10382 transitions. [2021-06-05 06:08:53,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:53,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:53,754 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:53,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 06:08:53,968 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:53,968 INFO L82 PathProgramCache]: Analyzing trace with hash 269975723, now seen corresponding path program 76 times [2021-06-05 06:08:53,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:53,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379627104] [2021-06-05 06:08:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:54,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:54,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379627104] [2021-06-05 06:08:54,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379627104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:54,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691330571] [2021-06-05 06:08:54,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:08:54,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:08:54,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:54,211 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:54,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:54,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:54,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:54,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:54,436 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 69 treesize of output 7 [2021-06-05 06:08:54,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:54,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:54,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:54,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:54,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691330571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:54,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:54,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:08:54,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044165124] [2021-06-05 06:08:54,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:54,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:54,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:54,462 INFO L87 Difference]: Start difference. First operand 4113 states and 10382 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:56,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:56,374 INFO L93 Difference]: Finished difference Result 4964 states and 12268 transitions. [2021-06-05 06:08:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 06:08:56,375 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:08:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:56,380 INFO L225 Difference]: With dead ends: 4964 [2021-06-05 06:08:56,380 INFO L226 Difference]: Without dead ends: 4899 [2021-06-05 06:08:56,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1687.1ms TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:08:56,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-06-05 06:08:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4207. [2021-06-05 06:08:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 2.5202092249167856) internal successors, (10600), 4206 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:56,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 10600 transitions. [2021-06-05 06:08:56,426 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 10600 transitions. Word has length 30 [2021-06-05 06:08:56,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:56,426 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 10600 transitions. [2021-06-05 06:08:56,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:56,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 10600 transitions. [2021-06-05 06:08:56,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:56,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:56,430 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:56,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 06:08:56,630 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:56,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1628515089, now seen corresponding path program 77 times [2021-06-05 06:08:56,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:56,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485525939] [2021-06-05 06:08:56,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:56,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:08:56,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485525939] [2021-06-05 06:08:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485525939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:56,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204162546] [2021-06-05 06:08:56,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:56,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 06:08:56,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:56,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:56,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:57,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:57,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:57,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:57,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:57,124 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 69 treesize of output 7 [2021-06-05 06:08:57,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:57,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:57,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:57,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:57,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204162546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:57,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:57,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:08:57,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862503330] [2021-06-05 06:08:57,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:08:57,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:57,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:08:57,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:08:57,156 INFO L87 Difference]: Start difference. First operand 4207 states and 10600 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:08:58,864 INFO L93 Difference]: Finished difference Result 4760 states and 11847 transitions. [2021-06-05 06:08:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:08:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:08:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:08:58,869 INFO L225 Difference]: With dead ends: 4760 [2021-06-05 06:08:58,870 INFO L226 Difference]: Without dead ends: 4720 [2021-06-05 06:08:58,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1474.0ms TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 06:08:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2021-06-05 06:08:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 4245. [2021-06-05 06:08:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4244 states have (on average 2.5155513666352496) internal successors, (10676), 4244 states have internal predecessors, (10676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 10676 transitions. [2021-06-05 06:08:58,911 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 10676 transitions. Word has length 30 [2021-06-05 06:08:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:08:58,911 INFO L482 AbstractCegarLoop]: Abstraction has 4245 states and 10676 transitions. [2021-06-05 06:08:58,911 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:08:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 10676 transitions. [2021-06-05 06:08:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:08:58,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:08:58,915 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:08:59,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:59,137 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:08:59,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:08:59,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1834453521, now seen corresponding path program 78 times [2021-06-05 06:08:59,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:08:59,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531465107] [2021-06-05 06:08:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:08:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:08:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:59,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:08:59,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531465107] [2021-06-05 06:08:59,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531465107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:59,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301204279] [2021-06-05 06:08:59,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:08:59,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 06:08:59,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:08:59,478 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:08:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:08:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:59,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:59,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:08:59,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:08:59,729 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 69 treesize of output 7 [2021-06-05 06:08:59,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:08:59,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:08:59,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:08:59,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:08:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:08:59,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301204279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:08:59,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:08:59,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:08:59,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205464453] [2021-06-05 06:08:59,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:08:59,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:08:59,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:08:59,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:08:59,755 INFO L87 Difference]: Start difference. First operand 4245 states and 10676 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:09:01,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:01,725 INFO L93 Difference]: Finished difference Result 4832 states and 11925 transitions. [2021-06-05 06:09:01,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:09:01,726 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-06-05 06:09:01,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:01,730 INFO L225 Difference]: With dead ends: 4832 [2021-06-05 06:09:01,730 INFO L226 Difference]: Without dead ends: 4777 [2021-06-05 06:09:01,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1851.0ms TimeCoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:09:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-06-05 06:09:01,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4315. [2021-06-05 06:09:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4315 states, 4314 states have (on average 2.5127491886879927) internal successors, (10840), 4314 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 10840 transitions. [2021-06-05 06:09:01,772 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 10840 transitions. Word has length 30 [2021-06-05 06:09:01,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:01,772 INFO L482 AbstractCegarLoop]: Abstraction has 4315 states and 10840 transitions. [2021-06-05 06:09:01,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:09:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 10840 transitions. [2021-06-05 06:09:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:01,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:01,775 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:01,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:01,976 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:01,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:01,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1966954945, now seen corresponding path program 79 times [2021-06-05 06:09:01,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:01,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866792114] [2021-06-05 06:09:01,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:02,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866792114] [2021-06-05 06:09:02,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866792114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:02,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030580670] [2021-06-05 06:09:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:02,298 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:02,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:02,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:02,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:02,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:02,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:02,568 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 69 treesize of output 7 [2021-06-05 06:09:02,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:02,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:02,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:02,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:02,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030580670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:02,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:02,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:09:02,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592860495] [2021-06-05 06:09:02,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:09:02,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:02,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:09:02,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:09:02,602 INFO L87 Difference]: Start difference. First operand 4315 states and 10840 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:09:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:04,257 INFO L93 Difference]: Finished difference Result 5809 states and 14168 transitions. [2021-06-05 06:09:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:09:04,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 30 [2021-06-05 06:09:04,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:04,262 INFO L225 Difference]: With dead ends: 5809 [2021-06-05 06:09:04,263 INFO L226 Difference]: Without dead ends: 5760 [2021-06-05 06:09:04,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1503.2ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:09:04,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-06-05 06:09:04,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 4424. [2021-06-05 06:09:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 2.5130002260908886) internal successors, (11115), 4423 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 11115 transitions. [2021-06-05 06:09:04,314 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 11115 transitions. Word has length 30 [2021-06-05 06:09:04,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:04,314 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 11115 transitions. [2021-06-05 06:09:04,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:09:04,314 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 11115 transitions. [2021-06-05 06:09:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:04,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:04,318 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:04,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:04,518 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:04,518 INFO L82 PathProgramCache]: Analyzing trace with hash -477602821, now seen corresponding path program 80 times [2021-06-05 06:09:04,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:04,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874040248] [2021-06-05 06:09:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:04,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:04,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874040248] [2021-06-05 06:09:04,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874040248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:04,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374997134] [2021-06-05 06:09:04,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:09:04,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:09:04,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:04,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:04,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:05,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:05,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:05,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:05,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:05,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:05,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:05,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:05,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:05,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:05,073 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 69 treesize of output 7 [2021-06-05 06:09:05,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:05,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:05,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:05,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:05,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374997134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:05,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:05,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:09:05,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865963997] [2021-06-05 06:09:05,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:09:05,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:05,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:09:05,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:09:05,098 INFO L87 Difference]: Start difference. First operand 4424 states and 11115 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:09:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:06,406 INFO L93 Difference]: Finished difference Result 5600 states and 13788 transitions. [2021-06-05 06:09:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:09:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 30 [2021-06-05 06:09:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:06,411 INFO L225 Difference]: With dead ends: 5600 [2021-06-05 06:09:06,412 INFO L226 Difference]: Without dead ends: 5549 [2021-06-05 06:09:06,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1320.9ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:09:06,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2021-06-05 06:09:06,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 4477. [2021-06-05 06:09:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 2.507372654155496) internal successors, (11223), 4476 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 11223 transitions. [2021-06-05 06:09:06,460 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 11223 transitions. Word has length 30 [2021-06-05 06:09:06,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:06,460 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 11223 transitions. [2021-06-05 06:09:06,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:09:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 11223 transitions. [2021-06-05 06:09:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:06,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:06,464 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:06,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:06,664 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:06,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1462264581, now seen corresponding path program 81 times [2021-06-05 06:09:06,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:06,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364972269] [2021-06-05 06:09:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:06,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:06,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364972269] [2021-06-05 06:09:06,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364972269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:06,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729745888] [2021-06-05 06:09:06,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:06,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:09:06,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:06,987 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 06:09:06,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:07,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:07,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:07,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:07,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:07,491 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:07,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-06-05 06:09:08,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-05 06:09:08,181 INFO L628 ElimStorePlain]: treesize reduction 578, result has 6.2 percent of original size [2021-06-05 06:09:08,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:08,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-06-05 06:09:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:08,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729745888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:08,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:08,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-05 06:09:08,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711186665] [2021-06-05 06:09:08,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:09:08,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:08,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:09:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:09:08,288 INFO L87 Difference]: Start difference. First operand 4477 states and 11223 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) [2021-06-05 06:09:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:10,927 INFO L93 Difference]: Finished difference Result 5628 states and 13862 transitions. [2021-06-05 06:09:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:09:10,928 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 30 [2021-06-05 06:09:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:10,933 INFO L225 Difference]: With dead ends: 5628 [2021-06-05 06:09:10,933 INFO L226 Difference]: Without dead ends: 5604 [2021-06-05 06:09:10,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2494.3ms TimeCoverageRelationStatistics Valid=675, Invalid=3357, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:09:10,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-06-05 06:09:10,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 4485. [2021-06-05 06:09:10,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 2.5064674397859052) internal successors, (11239), 4484 states have internal predecessors, (11239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 11239 transitions. [2021-06-05 06:09:10,987 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 11239 transitions. Word has length 30 [2021-06-05 06:09:10,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:10,988 INFO L482 AbstractCegarLoop]: Abstraction has 4485 states and 11239 transitions. [2021-06-05 06:09:10,988 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) [2021-06-05 06:09:10,988 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 11239 transitions. [2021-06-05 06:09:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:10,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:10,993 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:11,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:11,209 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:11,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:11,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1668203013, now seen corresponding path program 82 times [2021-06-05 06:09:11,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:11,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267260007] [2021-06-05 06:09:11,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:11,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:11,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:11,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267260007] [2021-06-05 06:09:11,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267260007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:11,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065996280] [2021-06-05 06:09:11,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:11,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:09:11,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:11,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:11,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:11,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:11,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:11,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:11,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:11,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:11,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:11,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:11,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:11,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:11,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:11,687 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 69 treesize of output 7 [2021-06-05 06:09:11,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:11,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:11,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:11,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:11,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:11,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065996280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:11,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:11,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:09:11,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40289244] [2021-06-05 06:09:11,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:09:11,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:11,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:09:11,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:09:11,713 INFO L87 Difference]: Start difference. First operand 4485 states and 11239 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:09:13,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:13,537 INFO L93 Difference]: Finished difference Result 5013 states and 12435 transitions. [2021-06-05 06:09:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:09:13,538 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-06-05 06:09:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:13,543 INFO L225 Difference]: With dead ends: 5013 [2021-06-05 06:09:13,543 INFO L226 Difference]: Without dead ends: 4984 [2021-06-05 06:09:13,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1680.9ms TimeCoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:09:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-06-05 06:09:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4423. [2021-06-05 06:09:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.4972862957937583) internal successors, (11043), 4422 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11043 transitions. [2021-06-05 06:09:13,592 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11043 transitions. Word has length 30 [2021-06-05 06:09:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:13,592 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11043 transitions. [2021-06-05 06:09:13,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:09:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11043 transitions. [2021-06-05 06:09:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:13,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:13,596 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:13,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 06:09:13,796 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:13,796 INFO L82 PathProgramCache]: Analyzing trace with hash 475012403, now seen corresponding path program 83 times [2021-06-05 06:09:13,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:13,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585452224] [2021-06-05 06:09:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:14,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:14,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585452224] [2021-06-05 06:09:14,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585452224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:14,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468338247] [2021-06-05 06:09:14,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:14,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:09:14,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:14,043 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:14,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:14,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:14,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:14,302 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 69 treesize of output 7 [2021-06-05 06:09:14,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:14,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:14,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:14,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:14,325 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:14,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468338247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:14,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:14,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:09:14,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129679698] [2021-06-05 06:09:14,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:09:14,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:14,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:09:14,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:09:14,326 INFO L87 Difference]: Start difference. First operand 4423 states and 11043 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 06:09:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:15,671 INFO L93 Difference]: Finished difference Result 4995 states and 12313 transitions. [2021-06-05 06:09:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:09:15,671 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 30 [2021-06-05 06:09:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:15,676 INFO L225 Difference]: With dead ends: 4995 [2021-06-05 06:09:15,676 INFO L226 Difference]: Without dead ends: 4959 [2021-06-05 06:09:15,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1161.7ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 06:09:15,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-06-05 06:09:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4643. [2021-06-05 06:09:15,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.503015941404567) internal successors, (11619), 4642 states have internal predecessors, (11619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11619 transitions. [2021-06-05 06:09:15,737 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11619 transitions. Word has length 30 [2021-06-05 06:09:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:15,737 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11619 transitions. [2021-06-05 06:09:15,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 06:09:15,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11619 transitions. [2021-06-05 06:09:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:15,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:15,741 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:15,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 06:09:15,942 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:15,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:15,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1805369083, now seen corresponding path program 84 times [2021-06-05 06:09:15,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:15,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688102745] [2021-06-05 06:09:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:16,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:16,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688102745] [2021-06-05 06:09:16,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688102745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:16,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351045216] [2021-06-05 06:09:16,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:16,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:09:16,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:16,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-05 06:09:16,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:16,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:16,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:16,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 79 [2021-06-05 06:09:16,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:09:16,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:16,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:16,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-06-05 06:09:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:16,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351045216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:16,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:16,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-05 06:09:16,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521030240] [2021-06-05 06:09:16,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 06:09:16,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:16,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 06:09:16,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 06:09:16,905 INFO L87 Difference]: Start difference. First operand 4643 states and 11619 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-06-05 06:09:18,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:18,978 INFO L93 Difference]: Finished difference Result 5869 states and 14309 transitions. [2021-06-05 06:09:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:09:18,979 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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 30 [2021-06-05 06:09:18,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:18,985 INFO L225 Difference]: With dead ends: 5869 [2021-06-05 06:09:18,985 INFO L226 Difference]: Without dead ends: 5852 [2021-06-05 06:09:18,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1814.8ms TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 06:09:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-06-05 06:09:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4657. [2021-06-05 06:09:19,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.5053694158075603) internal successors, (11665), 4656 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:19,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 11665 transitions. [2021-06-05 06:09:19,037 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 11665 transitions. Word has length 30 [2021-06-05 06:09:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:19,037 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 11665 transitions. [2021-06-05 06:09:19,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 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) [2021-06-05 06:09:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 11665 transitions. [2021-06-05 06:09:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:19,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:19,040 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:19,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 06:09:19,241 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1082897335, now seen corresponding path program 85 times [2021-06-05 06:09:19,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:19,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648379666] [2021-06-05 06:09:19,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:19,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648379666] [2021-06-05 06:09:19,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648379666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:19,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144137208] [2021-06-05 06:09:19,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:19,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:19,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:19,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:19,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:19,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:19,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:19,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:19,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:19,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:19,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:19,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:19,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:19,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-06-05 06:09:19,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:19,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:19,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:19,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:19,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144137208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:19,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:19,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-05 06:09:19,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137415117] [2021-06-05 06:09:19,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:09:19,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:19,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:09:19,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:09:19,803 INFO L87 Difference]: Start difference. First operand 4657 states and 11665 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:09:21,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:21,048 INFO L93 Difference]: Finished difference Result 5656 states and 13885 transitions. [2021-06-05 06:09:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 06:09:21,048 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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 30 [2021-06-05 06:09:21,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:21,053 INFO L225 Difference]: With dead ends: 5656 [2021-06-05 06:09:21,053 INFO L226 Difference]: Without dead ends: 5619 [2021-06-05 06:09:21,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1179.1ms TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 06:09:21,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-06-05 06:09:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4600. [2021-06-05 06:09:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.5057621222004784) internal successors, (11524), 4599 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 11524 transitions. [2021-06-05 06:09:21,100 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 11524 transitions. Word has length 30 [2021-06-05 06:09:21,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:21,100 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 11524 transitions. [2021-06-05 06:09:21,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 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) [2021-06-05 06:09:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 11524 transitions. [2021-06-05 06:09:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:21,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:21,103 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:21,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 06:09:21,305 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:21,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1193064333, now seen corresponding path program 86 times [2021-06-05 06:09:21,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:21,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183560535] [2021-06-05 06:09:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:21,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:21,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183560535] [2021-06-05 06:09:21,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183560535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:21,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089995033] [2021-06-05 06:09:21,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:21,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:09:21,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:21,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:21,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:21,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:21,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:21,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:21,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:21,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:21,778 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 69 treesize of output 7 [2021-06-05 06:09:21,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:21,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:21,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:21,784 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:21,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089995033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:21,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:21,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:09:21,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168330030] [2021-06-05 06:09:21,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:09:21,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:21,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:09:21,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:09:21,803 INFO L87 Difference]: Start difference. First operand 4600 states and 11524 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:23,193 INFO L93 Difference]: Finished difference Result 5225 states and 12941 transitions. [2021-06-05 06:09:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:09:23,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:09:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:23,199 INFO L225 Difference]: With dead ends: 5225 [2021-06-05 06:09:23,199 INFO L226 Difference]: Without dead ends: 5199 [2021-06-05 06:09:23,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1352.1ms TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 06:09:23,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-06-05 06:09:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4667. [2021-06-05 06:09:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.5053579082726105) internal successors, (11690), 4666 states have internal predecessors, (11690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 11690 transitions. [2021-06-05 06:09:23,255 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 11690 transitions. Word has length 30 [2021-06-05 06:09:23,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:23,255 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 11690 transitions. [2021-06-05 06:09:23,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:23,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 11690 transitions. [2021-06-05 06:09:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:23,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:23,260 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:23,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 06:09:23,460 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:23,461 INFO L82 PathProgramCache]: Analyzing trace with hash -84573205, now seen corresponding path program 87 times [2021-06-05 06:09:23,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:23,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097839133] [2021-06-05 06:09:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:23,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097839133] [2021-06-05 06:09:23,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097839133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:23,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791240212] [2021-06-05 06:09:23,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:23,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:09:23,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:23,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-05 06:09:23,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:24,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:24,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:24,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:24,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:24,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:24,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:24,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:24,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 141 [2021-06-05 06:09:24,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-06-05 06:09:24,305 INFO L628 ElimStorePlain]: treesize reduction 68, result has 32.7 percent of original size [2021-06-05 06:09:24,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:24,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:27 [2021-06-05 06:09:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:24,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791240212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:24,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:24,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 06:09:24,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956554028] [2021-06-05 06:09:24,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:09:24,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:24,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:09:24,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:09:24,397 INFO L87 Difference]: Start difference. First operand 4667 states and 11690 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) [2021-06-05 06:09:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:26,346 INFO L93 Difference]: Finished difference Result 5151 states and 12701 transitions. [2021-06-05 06:09:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:09:26,346 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 30 [2021-06-05 06:09:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:26,351 INFO L225 Difference]: With dead ends: 5151 [2021-06-05 06:09:26,351 INFO L226 Difference]: Without dead ends: 5117 [2021-06-05 06:09:26,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1898.7ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:09:26,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-05 06:09:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4671. [2021-06-05 06:09:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4670 states have (on average 2.507494646680942) internal successors, (11710), 4670 states have internal predecessors, (11710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 11710 transitions. [2021-06-05 06:09:26,403 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 11710 transitions. Word has length 30 [2021-06-05 06:09:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:26,403 INFO L482 AbstractCegarLoop]: Abstraction has 4671 states and 11710 transitions. [2021-06-05 06:09:26,403 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) [2021-06-05 06:09:26,403 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 11710 transitions. [2021-06-05 06:09:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:26,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:26,407 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:26,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:26,608 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:26,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:26,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1813763767, now seen corresponding path program 88 times [2021-06-05 06:09:26,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:26,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659047634] [2021-06-05 06:09:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:26,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:26,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659047634] [2021-06-05 06:09:26,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659047634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:26,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611665017] [2021-06-05 06:09:26,788 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 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 [2021-06-05 06:09:26,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:09:26,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:26,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:26,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:27,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:27,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:27,065 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 69 treesize of output 7 [2021-06-05 06:09:27,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:27,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:27,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:27,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:27,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611665017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:27,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:27,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:09:27,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076469304] [2021-06-05 06:09:27,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:09:27,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:27,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:09:27,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:09:27,089 INFO L87 Difference]: Start difference. First operand 4671 states and 11710 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 06:09:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:28,101 INFO L93 Difference]: Finished difference Result 5215 states and 12829 transitions. [2021-06-05 06:09:28,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 06:09:28,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 30 [2021-06-05 06:09:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:28,107 INFO L225 Difference]: With dead ends: 5215 [2021-06-05 06:09:28,107 INFO L226 Difference]: Without dead ends: 5184 [2021-06-05 06:09:28,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 06:09:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-06-05 06:09:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4822. [2021-06-05 06:09:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4821 states have (on average 2.5177349097697572) internal successors, (12138), 4821 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:28,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 12138 transitions. [2021-06-05 06:09:28,160 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 12138 transitions. Word has length 30 [2021-06-05 06:09:28,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:28,160 INFO L482 AbstractCegarLoop]: Abstraction has 4822 states and 12138 transitions. [2021-06-05 06:09:28,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-06-05 06:09:28,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 12138 transitions. [2021-06-05 06:09:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:28,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:28,164 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:28,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:28,365 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:28,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:28,365 INFO L82 PathProgramCache]: Analyzing trace with hash 409447283, now seen corresponding path program 89 times [2021-06-05 06:09:28,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:28,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987101388] [2021-06-05 06:09:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:28,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:28,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987101388] [2021-06-05 06:09:28,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987101388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:28,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523334705] [2021-06-05 06:09:28,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:28,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:09:28,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:28,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:28,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:28,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:28,837 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 69 treesize of output 7 [2021-06-05 06:09:28,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:28,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:28,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:28,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:28,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523334705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:28,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:28,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-05 06:09:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960435413] [2021-06-05 06:09:28,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:09:28,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:28,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:09:28,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:09:28,864 INFO L87 Difference]: Start difference. First operand 4822 states and 12138 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:30,548 INFO L93 Difference]: Finished difference Result 5370 states and 13300 transitions. [2021-06-05 06:09:30,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:09:30,549 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 06:09:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:30,555 INFO L225 Difference]: With dead ends: 5370 [2021-06-05 06:09:30,555 INFO L226 Difference]: Without dead ends: 5304 [2021-06-05 06:09:30,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1534.8ms TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:09:30,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-06-05 06:09:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4896. [2021-06-05 06:09:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4895 states have (on average 2.5141981613891726) internal successors, (12307), 4895 states have internal predecessors, (12307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 12307 transitions. [2021-06-05 06:09:30,613 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 12307 transitions. Word has length 30 [2021-06-05 06:09:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:30,613 INFO L482 AbstractCegarLoop]: Abstraction has 4896 states and 12307 transitions. [2021-06-05 06:09:30,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 12307 transitions. [2021-06-05 06:09:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:30,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:30,618 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:30,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 06:09:30,818 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:30,819 INFO L82 PathProgramCache]: Analyzing trace with hash 203508851, now seen corresponding path program 90 times [2021-06-05 06:09:30,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:30,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027321632] [2021-06-05 06:09:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:31,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:31,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027321632] [2021-06-05 06:09:31,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027321632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:31,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374041884] [2021-06-05 06:09:31,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:31,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 06:09:31,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:31,102 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:09:31,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:31,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:31,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:31,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:31,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:31,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:31,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:31,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:31,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2021-06-05 06:09:31,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:09:31,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:31,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:31,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:88, output treesize:41 [2021-06-05 06:09:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:31,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374041884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:31,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:31,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-05 06:09:31,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206127279] [2021-06-05 06:09:31,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 06:09:31,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:31,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 06:09:31,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-05 06:09:31,752 INFO L87 Difference]: Start difference. First operand 4896 states and 12307 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) [2021-06-05 06:09:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:33,577 INFO L93 Difference]: Finished difference Result 5271 states and 13100 transitions. [2021-06-05 06:09:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:09:33,578 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 30 [2021-06-05 06:09:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:33,585 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 06:09:33,585 INFO L226 Difference]: Without dead ends: 5223 [2021-06-05 06:09:33,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1728.3ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:09:33,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-06-05 06:09:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4919. [2021-06-05 06:09:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.5122000813338756) internal successors, (12355), 4918 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 12355 transitions. [2021-06-05 06:09:33,646 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 12355 transitions. Word has length 30 [2021-06-05 06:09:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:33,646 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 12355 transitions. [2021-06-05 06:09:33,646 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) [2021-06-05 06:09:33,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 12355 transitions. [2021-06-05 06:09:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 06:09:33,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:33,651 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:33,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 06:09:33,852 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:33,852 INFO L82 PathProgramCache]: Analyzing trace with hash -134828685, now seen corresponding path program 91 times [2021-06-05 06:09:33,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:33,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619849376] [2021-06-05 06:09:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:34,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:34,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619849376] [2021-06-05 06:09:34,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619849376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:34,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822135191] [2021-06-05 06:09:34,118 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 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 [2021-06-05 06:09:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:34,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 06:09:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:34,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:34,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:34,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:09:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:09:34,368 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 69 treesize of output 7 [2021-06-05 06:09:34,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:09:34,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:09:34,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:09:34,375 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-05 06:09:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:34,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822135191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:34,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:34,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-05 06:09:34,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328972630] [2021-06-05 06:09:34,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:09:34,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:34,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:09:34,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:09:34,396 INFO L87 Difference]: Start difference. First operand 4919 states and 12355 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:09:36,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:36,183 INFO L93 Difference]: Finished difference Result 5304 states and 13161 transitions. [2021-06-05 06:09:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 06:09:36,183 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-06-05 06:09:36,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:36,188 INFO L225 Difference]: With dead ends: 5304 [2021-06-05 06:09:36,189 INFO L226 Difference]: Without dead ends: 5284 [2021-06-05 06:09:36,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1651.8ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 06:09:36,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-06-05 06:09:36,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4960. [2021-06-05 06:09:36,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 2.51401492236338) internal successors, (12467), 4959 states have internal predecessors, (12467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:36,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 12467 transitions. [2021-06-05 06:09:36,238 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 12467 transitions. Word has length 30 [2021-06-05 06:09:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:36,238 INFO L482 AbstractCegarLoop]: Abstraction has 4960 states and 12467 transitions. [2021-06-05 06:09:36,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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) [2021-06-05 06:09:36,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 12467 transitions. [2021-06-05 06:09:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:36,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:36,242 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:36,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:36,443 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:36,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:36,443 INFO L82 PathProgramCache]: Analyzing trace with hash -672367353, now seen corresponding path program 92 times [2021-06-05 06:09:36,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:36,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743728687] [2021-06-05 06:09:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:36,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:36,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743728687] [2021-06-05 06:09:36,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743728687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:36,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551584083] [2021-06-05 06:09:36,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:36,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:09:36,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:36,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:36,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551584083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:36,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:36,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:09:36,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591480414] [2021-06-05 06:09:36,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:09:36,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:36,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:09:36,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:09:36,744 INFO L87 Difference]: Start difference. First operand 4960 states and 12467 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-06-05 06:09:37,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:37,811 INFO L93 Difference]: Finished difference Result 6004 states and 14671 transitions. [2021-06-05 06:09:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:09:37,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 32 [2021-06-05 06:09:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:37,818 INFO L225 Difference]: With dead ends: 6004 [2021-06-05 06:09:37,818 INFO L226 Difference]: Without dead ends: 6004 [2021-06-05 06:09:37,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 961.1ms TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:09:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-06-05 06:09:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 4735. [2021-06-05 06:09:37,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 2.511406844106464) internal successors, (11889), 4734 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 11889 transitions. [2021-06-05 06:09:37,872 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 11889 transitions. Word has length 32 [2021-06-05 06:09:37,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:37,872 INFO L482 AbstractCegarLoop]: Abstraction has 4735 states and 11889 transitions. [2021-06-05 06:09:37,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-06-05 06:09:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 11889 transitions. [2021-06-05 06:09:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:37,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:37,876 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:38,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 06:09:38,077 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:38,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:38,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1632455975, now seen corresponding path program 93 times [2021-06-05 06:09:38,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:38,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839416299] [2021-06-05 06:09:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:38,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:38,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839416299] [2021-06-05 06:09:38,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839416299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:38,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981106448] [2021-06-05 06:09:38,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:09:38,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:09:38,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:38,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981106448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:38,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:38,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:09:38,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412545373] [2021-06-05 06:09:38,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:09:38,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:38,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:09:38,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:09:38,373 INFO L87 Difference]: Start difference. First operand 4735 states and 11889 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-06-05 06:09:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:39,903 INFO L93 Difference]: Finished difference Result 7971 states and 19194 transitions. [2021-06-05 06:09:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 06:09:39,904 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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 32 [2021-06-05 06:09:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:39,911 INFO L225 Difference]: With dead ends: 7971 [2021-06-05 06:09:39,911 INFO L226 Difference]: Without dead ends: 7867 [2021-06-05 06:09:39,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 1420.5ms TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 06:09:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2021-06-05 06:09:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 5211. [2021-06-05 06:09:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 5210 states have (on average 2.5299424184261037) internal successors, (13181), 5210 states have internal predecessors, (13181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 13181 transitions. [2021-06-05 06:09:39,989 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 13181 transitions. Word has length 32 [2021-06-05 06:09:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:39,989 INFO L482 AbstractCegarLoop]: Abstraction has 5211 states and 13181 transitions. [2021-06-05 06:09:39,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-06-05 06:09:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 13181 transitions. [2021-06-05 06:09:39,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:39,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:39,993 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:40,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:40,194 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:40,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:40,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1308512999, now seen corresponding path program 94 times [2021-06-05 06:09:40,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:40,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57485911] [2021-06-05 06:09:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:40,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57485911] [2021-06-05 06:09:40,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57485911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:40,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533475787] [2021-06-05 06:09:40,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:40,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:09:40,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:40,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:40,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:40,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533475787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:40,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:40,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 06:09:40,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667692897] [2021-06-05 06:09:40,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:09:40,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:09:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:09:40,471 INFO L87 Difference]: Start difference. First operand 5211 states and 13181 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-06-05 06:09:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:41,723 INFO L93 Difference]: Finished difference Result 9415 states and 23381 transitions. [2021-06-05 06:09:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 06:09:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-06-05 06:09:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:41,733 INFO L225 Difference]: With dead ends: 9415 [2021-06-05 06:09:41,733 INFO L226 Difference]: Without dead ends: 9411 [2021-06-05 06:09:41,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1086.6ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 06:09:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-06-05 06:09:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 6840. [2021-06-05 06:09:41,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 2.5451089340546864) internal successors, (17406), 6839 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 17406 transitions. [2021-06-05 06:09:41,829 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 17406 transitions. Word has length 32 [2021-06-05 06:09:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:41,829 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 17406 transitions. [2021-06-05 06:09:41,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-06-05 06:09:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 17406 transitions. [2021-06-05 06:09:41,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:41,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:41,835 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:42,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:42,037 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:42,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:42,037 INFO L82 PathProgramCache]: Analyzing trace with hash 976834211, now seen corresponding path program 95 times [2021-06-05 06:09:42,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:42,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576229905] [2021-06-05 06:09:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:42,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576229905] [2021-06-05 06:09:42,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576229905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:42,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71728247] [2021-06-05 06:09:42,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:42,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 06:09:42,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:42,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:42,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71728247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:42,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:42,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 06:09:42,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475683272] [2021-06-05 06:09:42,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:09:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:42,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:09:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:09:42,305 INFO L87 Difference]: Start difference. First operand 6840 states and 17406 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-06-05 06:09:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:43,269 INFO L93 Difference]: Finished difference Result 7287 states and 18264 transitions. [2021-06-05 06:09:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:09:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-06-05 06:09:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:43,301 INFO L225 Difference]: With dead ends: 7287 [2021-06-05 06:09:43,301 INFO L226 Difference]: Without dead ends: 7283 [2021-06-05 06:09:43,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 873.3ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:09:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2021-06-05 06:09:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 6779. [2021-06-05 06:09:43,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 6778 states have (on average 2.5457362053703156) internal successors, (17255), 6778 states have internal predecessors, (17255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 17255 transitions. [2021-06-05 06:09:43,376 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 17255 transitions. Word has length 32 [2021-06-05 06:09:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:43,376 INFO L482 AbstractCegarLoop]: Abstraction has 6779 states and 17255 transitions. [2021-06-05 06:09:43,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-06-05 06:09:43,376 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 17255 transitions. [2021-06-05 06:09:43,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:43,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:43,381 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:43,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable582 [2021-06-05 06:09:43,582 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:43,582 INFO L82 PathProgramCache]: Analyzing trace with hash 542563561, now seen corresponding path program 96 times [2021-06-05 06:09:43,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:43,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023383899] [2021-06-05 06:09:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:43,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:43,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023383899] [2021-06-05 06:09:43,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023383899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:43,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382339861] [2021-06-05 06:09:43,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:43,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:09:43,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:43,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:43,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:43,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382339861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:43,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:43,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 06:09:43,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926180333] [2021-06-05 06:09:43,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:09:43,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:43,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:09:43,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:09:43,827 INFO L87 Difference]: Start difference. First operand 6779 states and 17255 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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) [2021-06-05 06:09:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:44,581 INFO L93 Difference]: Finished difference Result 8864 states and 22216 transitions. [2021-06-05 06:09:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:09:44,581 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 32 [2021-06-05 06:09:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:44,590 INFO L225 Difference]: With dead ends: 8864 [2021-06-05 06:09:44,591 INFO L226 Difference]: Without dead ends: 8852 [2021-06-05 06:09:44,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 06:09:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2021-06-05 06:09:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 7049. [2021-06-05 06:09:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7049 states, 7048 states have (on average 2.555192962542565) internal successors, (18009), 7048 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 18009 transitions. [2021-06-05 06:09:44,688 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 18009 transitions. Word has length 32 [2021-06-05 06:09:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:44,688 INFO L482 AbstractCegarLoop]: Abstraction has 7049 states and 18009 transitions. [2021-06-05 06:09:44,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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) [2021-06-05 06:09:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 18009 transitions. [2021-06-05 06:09:44,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:44,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:44,694 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:44,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:44,894 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:44,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:44,894 INFO L82 PathProgramCache]: Analyzing trace with hash 987096583, now seen corresponding path program 97 times [2021-06-05 06:09:44,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:44,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877555567] [2021-06-05 06:09:44,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:44,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:44,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877555567] [2021-06-05 06:09:44,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877555567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:44,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997613103] [2021-06-05 06:09:44,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:44,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:44,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:45,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997613103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:45,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:45,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 06:09:45,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106598370] [2021-06-05 06:09:45,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:09:45,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:09:45,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:09:45,282 INFO L87 Difference]: Start difference. First operand 7049 states and 18009 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 06:09:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:46,289 INFO L93 Difference]: Finished difference Result 8195 states and 20473 transitions. [2021-06-05 06:09:46,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:09:46,289 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2021-06-05 06:09:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:46,298 INFO L225 Difference]: With dead ends: 8195 [2021-06-05 06:09:46,298 INFO L226 Difference]: Without dead ends: 8183 [2021-06-05 06:09:46,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 991.5ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:09:46,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2021-06-05 06:09:46,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 7241. [2021-06-05 06:09:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7241 states, 7240 states have (on average 2.56353591160221) internal successors, (18560), 7240 states have internal predecessors, (18560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7241 states to 7241 states and 18560 transitions. [2021-06-05 06:09:46,388 INFO L78 Accepts]: Start accepts. Automaton has 7241 states and 18560 transitions. Word has length 32 [2021-06-05 06:09:46,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:46,388 INFO L482 AbstractCegarLoop]: Abstraction has 7241 states and 18560 transitions. [2021-06-05 06:09:46,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 06:09:46,388 INFO L276 IsEmpty]: Start isEmpty. Operand 7241 states and 18560 transitions. [2021-06-05 06:09:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:46,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:46,394 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:46,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:46,594 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:46,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1995895033, now seen corresponding path program 98 times [2021-06-05 06:09:46,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:46,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143073331] [2021-06-05 06:09:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:46,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:46,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143073331] [2021-06-05 06:09:46,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143073331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:46,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773729589] [2021-06-05 06:09:46,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:46,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:09:46,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:46,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:46,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773729589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:46,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:46,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 06:09:46,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763804675] [2021-06-05 06:09:46,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:09:46,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:46,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:09:46,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:09:46,862 INFO L87 Difference]: Start difference. First operand 7241 states and 18560 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:09:47,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:47,950 INFO L93 Difference]: Finished difference Result 8748 states and 21799 transitions. [2021-06-05 06:09:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 06:09:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-06-05 06:09:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:47,961 INFO L225 Difference]: With dead ends: 8748 [2021-06-05 06:09:47,961 INFO L226 Difference]: Without dead ends: 8722 [2021-06-05 06:09:47,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 949.9ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:09:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-06-05 06:09:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 7346. [2021-06-05 06:09:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 2.5699115044247787) internal successors, (18876), 7345 states have internal predecessors, (18876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 18876 transitions. [2021-06-05 06:09:48,070 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 18876 transitions. Word has length 32 [2021-06-05 06:09:48,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:48,070 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 18876 transitions. [2021-06-05 06:09:48,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:09:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 18876 transitions. [2021-06-05 06:09:48,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:48,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:48,076 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:48,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 06:09:48,277 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash 387315719, now seen corresponding path program 99 times [2021-06-05 06:09:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741499356] [2021-06-05 06:09:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:48,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:48,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741499356] [2021-06-05 06:09:48,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741499356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:48,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319522599] [2021-06-05 06:09:48,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:48,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 06:09:48,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:48,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:48,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319522599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:48,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:48,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:09:48,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195253108] [2021-06-05 06:09:48,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:09:48,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:09:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:09:48,570 INFO L87 Difference]: Start difference. First operand 7346 states and 18876 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-06-05 06:09:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:49,568 INFO L93 Difference]: Finished difference Result 9131 states and 22754 transitions. [2021-06-05 06:09:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 06:09:49,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 32 [2021-06-05 06:09:49,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:49,579 INFO L225 Difference]: With dead ends: 9131 [2021-06-05 06:09:49,579 INFO L226 Difference]: Without dead ends: 9101 [2021-06-05 06:09:49,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 913.6ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:09:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2021-06-05 06:09:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 6682. [2021-06-05 06:09:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6681 states have (on average 2.5696751983236044) internal successors, (17168), 6681 states have internal predecessors, (17168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 17168 transitions. [2021-06-05 06:09:49,696 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 17168 transitions. Word has length 32 [2021-06-05 06:09:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:49,696 INFO L482 AbstractCegarLoop]: Abstraction has 6682 states and 17168 transitions. [2021-06-05 06:09:49,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-06-05 06:09:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 17168 transitions. [2021-06-05 06:09:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:49,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:49,701 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:49,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 06:09:49,902 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:49,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1126651079, now seen corresponding path program 100 times [2021-06-05 06:09:49,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:49,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531702888] [2021-06-05 06:09:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:49,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531702888] [2021-06-05 06:09:49,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531702888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:49,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116458114] [2021-06-05 06:09:49,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:50,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:09:50,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:50,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:50,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:50,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116458114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:50,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:50,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:09:50,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551607875] [2021-06-05 06:09:50,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:09:50,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:50,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:09:50,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:09:50,194 INFO L87 Difference]: Start difference. First operand 6682 states and 17168 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-06-05 06:09:51,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:51,292 INFO L93 Difference]: Finished difference Result 8276 states and 20409 transitions. [2021-06-05 06:09:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:09:51,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 32 [2021-06-05 06:09:51,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:51,300 INFO L225 Difference]: With dead ends: 8276 [2021-06-05 06:09:51,301 INFO L226 Difference]: Without dead ends: 8276 [2021-06-05 06:09:51,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:09:51,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-05 06:09:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6034. [2021-06-05 06:09:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 6033 states have (on average 2.554284767114205) internal successors, (15410), 6033 states have internal predecessors, (15410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:51,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 15410 transitions. [2021-06-05 06:09:51,379 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 15410 transitions. Word has length 32 [2021-06-05 06:09:51,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:51,379 INFO L482 AbstractCegarLoop]: Abstraction has 6034 states and 15410 transitions. [2021-06-05 06:09:51,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-06-05 06:09:51,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 15410 transitions. [2021-06-05 06:09:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:51,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:51,384 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:51,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 06:09:51,585 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:51,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1001568577, now seen corresponding path program 101 times [2021-06-05 06:09:51,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:51,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759253561] [2021-06-05 06:09:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:51,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:51,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759253561] [2021-06-05 06:09:51,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759253561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:51,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975313759] [2021-06-05 06:09:51,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:51,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 06:09:51,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:51,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:51,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:51,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975313759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:51,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:51,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:09:51,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321670732] [2021-06-05 06:09:51,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:09:51,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:51,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:09:51,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:09:51,861 INFO L87 Difference]: Start difference. First operand 6034 states and 15410 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-06-05 06:09:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:52,915 INFO L93 Difference]: Finished difference Result 7180 states and 17683 transitions. [2021-06-05 06:09:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 06:09:52,916 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 32 [2021-06-05 06:09:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:52,923 INFO L225 Difference]: With dead ends: 7180 [2021-06-05 06:09:52,923 INFO L226 Difference]: Without dead ends: 7114 [2021-06-05 06:09:52,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 975.8ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:09:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2021-06-05 06:09:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 6028. [2021-06-05 06:09:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.553177368508379) internal successors, (15388), 6027 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 15388 transitions. [2021-06-05 06:09:53,004 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 15388 transitions. Word has length 32 [2021-06-05 06:09:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:53,004 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 15388 transitions. [2021-06-05 06:09:53,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-06-05 06:09:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 15388 transitions. [2021-06-05 06:09:53,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:53,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:53,009 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:53,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:53,210 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:53,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:53,210 INFO L82 PathProgramCache]: Analyzing trace with hash -32333067, now seen corresponding path program 102 times [2021-06-05 06:09:53,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:53,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154846879] [2021-06-05 06:09:53,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:53,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:53,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154846879] [2021-06-05 06:09:53,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154846879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:53,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939739459] [2021-06-05 06:09:53,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:53,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 06:09:53,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:53,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:53,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:53,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939739459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:53,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:53,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:09:53,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120586481] [2021-06-05 06:09:53,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:09:53,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:53,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:09:53,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:09:53,502 INFO L87 Difference]: Start difference. First operand 6028 states and 15388 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-06-05 06:09:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:54,719 INFO L93 Difference]: Finished difference Result 8027 states and 19692 transitions. [2021-06-05 06:09:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:09:54,719 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 32 [2021-06-05 06:09:54,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:54,728 INFO L225 Difference]: With dead ends: 8027 [2021-06-05 06:09:54,729 INFO L226 Difference]: Without dead ends: 8027 [2021-06-05 06:09:54,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1063.7ms TimeCoverageRelationStatistics Valid=1499, Invalid=4051, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:09:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-06-05 06:09:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 5454. [2021-06-05 06:09:54,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.526865945351183) internal successors, (13779), 5453 states have internal predecessors, (13779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:54,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13779 transitions. [2021-06-05 06:09:54,811 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13779 transitions. Word has length 32 [2021-06-05 06:09:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:54,811 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13779 transitions. [2021-06-05 06:09:54,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-06-05 06:09:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13779 transitions. [2021-06-05 06:09:54,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:54,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:54,816 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:55,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 06:09:55,016 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1252561661, now seen corresponding path program 103 times [2021-06-05 06:09:55,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:55,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675778868] [2021-06-05 06:09:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:55,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:55,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675778868] [2021-06-05 06:09:55,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675778868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:55,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140711862] [2021-06-05 06:09:55,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:55,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:55,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:55,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140711862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:55,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:55,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 06:09:55,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532234478] [2021-06-05 06:09:55,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:09:55,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:55,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:09:55,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:09:55,299 INFO L87 Difference]: Start difference. First operand 5454 states and 13779 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:09:56,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:56,293 INFO L93 Difference]: Finished difference Result 6472 states and 15876 transitions. [2021-06-05 06:09:56,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:09:56,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-06-05 06:09:56,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:56,300 INFO L225 Difference]: With dead ends: 6472 [2021-06-05 06:09:56,300 INFO L226 Difference]: Without dead ends: 6433 [2021-06-05 06:09:56,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:09:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-06-05 06:09:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 5454. [2021-06-05 06:09:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5241151659636896) internal successors, (13764), 5453 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13764 transitions. [2021-06-05 06:09:56,376 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13764 transitions. Word has length 32 [2021-06-05 06:09:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:56,376 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13764 transitions. [2021-06-05 06:09:56,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:09:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13764 transitions. [2021-06-05 06:09:56,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:56,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:56,381 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:56,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 06:09:56,582 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash -180243655, now seen corresponding path program 104 times [2021-06-05 06:09:56,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:56,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375090388] [2021-06-05 06:09:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:56,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:56,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375090388] [2021-06-05 06:09:56,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375090388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:56,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352506748] [2021-06-05 06:09:56,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:56,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:09:56,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:56,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:56,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:56,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352506748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:56,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:56,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 06:09:56,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831568378] [2021-06-05 06:09:56,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:09:56,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:56,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:09:56,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:09:56,855 INFO L87 Difference]: Start difference. First operand 5454 states and 13764 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-06-05 06:09:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:58,156 INFO L93 Difference]: Finished difference Result 8061 states and 19706 transitions. [2021-06-05 06:09:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:09:58,156 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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 32 [2021-06-05 06:09:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:58,164 INFO L225 Difference]: With dead ends: 8061 [2021-06-05 06:09:58,164 INFO L226 Difference]: Without dead ends: 8061 [2021-06-05 06:09:58,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1130.0ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 06:09:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-06-05 06:09:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6057. [2021-06-05 06:09:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 6056 states have (on average 2.5155217965653898) internal successors, (15234), 6056 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 15234 transitions. [2021-06-05 06:09:58,246 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 15234 transitions. Word has length 32 [2021-06-05 06:09:58,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:58,246 INFO L482 AbstractCegarLoop]: Abstraction has 6057 states and 15234 transitions. [2021-06-05 06:09:58,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-06-05 06:09:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 15234 transitions. [2021-06-05 06:09:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:58,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:58,250 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:58,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:58,451 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:58,451 INFO L82 PathProgramCache]: Analyzing trace with hash 729918393, now seen corresponding path program 105 times [2021-06-05 06:09:58,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:58,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333807881] [2021-06-05 06:09:58,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:58,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:58,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333807881] [2021-06-05 06:09:58,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333807881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:58,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329710523] [2021-06-05 06:09:58,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:58,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 06:09:58,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:09:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:09:58,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:09:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:09:58,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329710523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:58,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:09:58,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 06:09:58,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716869620] [2021-06-05 06:09:58,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:09:58,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:09:58,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:09:58,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:09:58,708 INFO L87 Difference]: Start difference. First operand 6057 states and 15234 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 06:09:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:09:59,638 INFO L93 Difference]: Finished difference Result 6889 states and 16992 transitions. [2021-06-05 06:09:59,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:09:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2021-06-05 06:09:59,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:09:59,645 INFO L225 Difference]: With dead ends: 6889 [2021-06-05 06:09:59,646 INFO L226 Difference]: Without dead ends: 6871 [2021-06-05 06:09:59,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 791.1ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:09:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-06-05 06:09:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6077. [2021-06-05 06:09:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 2.517774851876234) internal successors, (15298), 6076 states have internal predecessors, (15298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:09:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 15298 transitions. [2021-06-05 06:09:59,716 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 15298 transitions. Word has length 32 [2021-06-05 06:09:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:09:59,716 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 15298 transitions. [2021-06-05 06:09:59,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 06:09:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 15298 transitions. [2021-06-05 06:09:59,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:09:59,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:09:59,721 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:09:59,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:09:59,921 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:09:59,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:09:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash -853693707, now seen corresponding path program 106 times [2021-06-05 06:09:59,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:09:59,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219424409] [2021-06-05 06:09:59,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:09:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:09:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:09:59,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:09:59,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219424409] [2021-06-05 06:09:59,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219424409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:09:59,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727335609] [2021-06-05 06:09:59,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:00,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:10:00,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:00,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:10:00,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:00,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727335609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:00,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:00,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 06:10:00,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229437252] [2021-06-05 06:10:00,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:10:00,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:00,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:10:00,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:10:00,185 INFO L87 Difference]: Start difference. First operand 6077 states and 15298 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2021-06-05 06:10:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:01,517 INFO L93 Difference]: Finished difference Result 10330 states and 25935 transitions. [2021-06-05 06:10:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 06:10:01,517 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 32 [2021-06-05 06:10:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:01,536 INFO L225 Difference]: With dead ends: 10330 [2021-06-05 06:10:01,536 INFO L226 Difference]: Without dead ends: 10330 [2021-06-05 06:10:01,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1150.8ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 06:10:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10330 states. [2021-06-05 06:10:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10330 to 9091. [2021-06-05 06:10:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9091 states, 9090 states have (on average 2.5674367436743672) internal successors, (23338), 9090 states have internal predecessors, (23338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9091 states to 9091 states and 23338 transitions. [2021-06-05 06:10:01,720 INFO L78 Accepts]: Start accepts. Automaton has 9091 states and 23338 transitions. Word has length 32 [2021-06-05 06:10:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:01,720 INFO L482 AbstractCegarLoop]: Abstraction has 9091 states and 23338 transitions. [2021-06-05 06:10:01,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2021-06-05 06:10:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 9091 states and 23338 transitions. [2021-06-05 06:10:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:10:01,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:01,727 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:01,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:01,928 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:01,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1689192365, now seen corresponding path program 107 times [2021-06-05 06:10:01,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:01,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7253554] [2021-06-05 06:10:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:10:01,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:01,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7253554] [2021-06-05 06:10:01,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7253554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:01,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534362445] [2021-06-05 06:10:01,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:02,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:10:02,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:02,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:10:02,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:02,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534362445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:02,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:02,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-05 06:10:02,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006661258] [2021-06-05 06:10:02,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 06:10:02,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:02,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 06:10:02,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-05 06:10:02,181 INFO L87 Difference]: Start difference. First operand 9091 states and 23338 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-06-05 06:10:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:03,073 INFO L93 Difference]: Finished difference Result 10140 states and 25474 transitions. [2021-06-05 06:10:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:10:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-06-05 06:10:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:03,085 INFO L225 Difference]: With dead ends: 10140 [2021-06-05 06:10:03,085 INFO L226 Difference]: Without dead ends: 10136 [2021-06-05 06:10:03,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 760.6ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:10:03,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-05 06:10:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8995. [2021-06-05 06:10:03,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8995 states, 8994 states have (on average 2.5654881031798977) internal successors, (23074), 8994 states have internal predecessors, (23074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:03,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 23074 transitions. [2021-06-05 06:10:03,221 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 23074 transitions. Word has length 32 [2021-06-05 06:10:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:03,221 INFO L482 AbstractCegarLoop]: Abstraction has 8995 states and 23074 transitions. [2021-06-05 06:10:03,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-06-05 06:10:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 23074 transitions. [2021-06-05 06:10:03,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:10:03,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:03,228 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:03,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:03,428 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:03,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:03,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1182846099, now seen corresponding path program 108 times [2021-06-05 06:10:03,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:03,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837872717] [2021-06-05 06:10:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:10:03,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:03,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837872717] [2021-06-05 06:10:03,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837872717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:03,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630564482] [2021-06-05 06:10:03,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:03,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:10:03,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:03,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:10:03,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:03,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630564482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:03,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:03,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-05 06:10:03,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739545682] [2021-06-05 06:10:03,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 06:10:03,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:03,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 06:10:03,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 06:10:03,694 INFO L87 Difference]: Start difference. First operand 8995 states and 23074 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 06:10:04,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:04,596 INFO L93 Difference]: Finished difference Result 10548 states and 26516 transitions. [2021-06-05 06:10:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:10:04,597 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2021-06-05 06:10:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:04,608 INFO L225 Difference]: With dead ends: 10548 [2021-06-05 06:10:04,609 INFO L226 Difference]: Without dead ends: 10536 [2021-06-05 06:10:04,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 787.9ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:10:04,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-06-05 06:10:04,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 9183. [2021-06-05 06:10:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9183 states, 9182 states have (on average 2.5686125027227185) internal successors, (23585), 9182 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9183 states to 9183 states and 23585 transitions. [2021-06-05 06:10:04,746 INFO L78 Accepts]: Start accepts. Automaton has 9183 states and 23585 transitions. Word has length 32 [2021-06-05 06:10:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:04,746 INFO L482 AbstractCegarLoop]: Abstraction has 9183 states and 23585 transitions. [2021-06-05 06:10:04,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-06-05 06:10:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 9183 states and 23585 transitions. [2021-06-05 06:10:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:10:04,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:04,753 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:04,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 06:10:04,955 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:04,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:04,955 INFO L82 PathProgramCache]: Analyzing trace with hash 955624719, now seen corresponding path program 109 times [2021-06-05 06:10:04,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:04,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741704862] [2021-06-05 06:10:04,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:05,019 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:10:05,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:05,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741704862] [2021-06-05 06:10:05,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741704862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:05,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000223915] [2021-06-05 06:10:05,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:05,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:10:05,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:05,222 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:05,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000223915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:05,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:05,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-05 06:10:05,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741338773] [2021-06-05 06:10:05,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 06:10:05,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:05,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 06:10:05,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-05 06:10:05,223 INFO L87 Difference]: Start difference. First operand 9183 states and 23585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:10:06,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:06,151 INFO L93 Difference]: Finished difference Result 11364 states and 28535 transitions. [2021-06-05 06:10:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 06:10:06,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-06-05 06:10:06,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:06,164 INFO L225 Difference]: With dead ends: 11364 [2021-06-05 06:10:06,164 INFO L226 Difference]: Without dead ends: 11344 [2021-06-05 06:10:06,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:10:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11344 states. [2021-06-05 06:10:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 10146. [2021-06-05 06:10:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 2.574075899457861) internal successors, (26114), 10145 states have internal predecessors, (26114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:06,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 26114 transitions. [2021-06-05 06:10:06,339 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 26114 transitions. Word has length 32 [2021-06-05 06:10:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:06,340 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 26114 transitions. [2021-06-05 06:10:06,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-06-05 06:10:06,340 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 26114 transitions. [2021-06-05 06:10:06,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:10:06,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:06,347 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:06,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 06:10:06,548 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1639210635, now seen corresponding path program 110 times [2021-06-05 06:10:06,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:06,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893680302] [2021-06-05 06:10:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:06,621 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:10:06,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:06,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893680302] [2021-06-05 06:10:06,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893680302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:06,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956584404] [2021-06-05 06:10:06,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:06,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:10:06,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:06,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:10:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:06,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956584404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:06,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:06,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-05 06:10:06,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333139951] [2021-06-05 06:10:06,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 06:10:06,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 06:10:06,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 06:10:06,868 INFO L87 Difference]: Start difference. First operand 10146 states and 26114 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-06-05 06:10:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:07,871 INFO L93 Difference]: Finished difference Result 12734 states and 32033 transitions. [2021-06-05 06:10:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:10:07,872 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 32 [2021-06-05 06:10:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:07,888 INFO L225 Difference]: With dead ends: 12734 [2021-06-05 06:10:07,888 INFO L226 Difference]: Without dead ends: 12706 [2021-06-05 06:10:07,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 902.7ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 06:10:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-06-05 06:10:08,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 11409. [2021-06-05 06:10:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 2.579330294530154) internal successors, (29425), 11408 states have internal predecessors, (29425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 29425 transitions. [2021-06-05 06:10:08,072 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 29425 transitions. Word has length 32 [2021-06-05 06:10:08,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:08,072 INFO L482 AbstractCegarLoop]: Abstraction has 11409 states and 29425 transitions. [2021-06-05 06:10:08,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-06-05 06:10:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 29425 transitions. [2021-06-05 06:10:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 06:10:08,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:08,081 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:08,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 06:10:08,285 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:08,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:08,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279623, now seen corresponding path program 111 times [2021-06-05 06:10:08,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:08,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320602581] [2021-06-05 06:10:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:08,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:08,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320602581] [2021-06-05 06:10:08,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320602581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621933887] [2021-06-05 06:10:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:08,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 06:10:08,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 06:10:08,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:08,651 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:08,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621933887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:08,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:08,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-05 06:10:08,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134868517] [2021-06-05 06:10:08,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:10:08,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:08,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:10:08,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:10:08,652 INFO L87 Difference]: Start difference. First operand 11409 states and 29425 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-06-05 06:10:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:09,767 INFO L93 Difference]: Finished difference Result 12970 states and 32809 transitions. [2021-06-05 06:10:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:10:09,767 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 32 [2021-06-05 06:10:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:09,783 INFO L225 Difference]: With dead ends: 12970 [2021-06-05 06:10:09,783 INFO L226 Difference]: Without dead ends: 12934 [2021-06-05 06:10:09,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1069.8ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:10:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2021-06-05 06:10:09,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 11759. [2021-06-05 06:10:09,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.5852185745875147) internal successors, (30397), 11758 states have internal predecessors, (30397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30397 transitions. [2021-06-05 06:10:09,954 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30397 transitions. Word has length 32 [2021-06-05 06:10:09,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:09,954 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30397 transitions. [2021-06-05 06:10:09,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-06-05 06:10:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30397 transitions. [2021-06-05 06:10:09,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:09,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:09,964 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:10,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 06:10:10,164 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:10,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:10,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1812733093, now seen corresponding path program 112 times [2021-06-05 06:10:10,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:10,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328203685] [2021-06-05 06:10:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:10,511 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:10,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328203685] [2021-06-05 06:10:10,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328203685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:10,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814397331] [2021-06-05 06:10:10,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:10,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:10:10,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:10,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:10:10,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:10,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:10,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:10,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:10,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:10,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:10,953 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 85 treesize of output 7 [2021-06-05 06:10:10,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:10:10,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:10,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:10:10,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:10:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:10,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814397331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:10,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:10,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 06:10:10,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750072956] [2021-06-05 06:10:10,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:10:10,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:10,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:10:10,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:10:10,979 INFO L87 Difference]: Start difference. First operand 11759 states and 30397 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:13,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:13,603 INFO L93 Difference]: Finished difference Result 14875 states and 37756 transitions. [2021-06-05 06:10:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:10:13,603 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:10:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:13,623 INFO L225 Difference]: With dead ends: 14875 [2021-06-05 06:10:13,623 INFO L226 Difference]: Without dead ends: 14868 [2021-06-05 06:10:13,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 2375.4ms TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:10:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2021-06-05 06:10:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 11941. [2021-06-05 06:10:13,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11940 states have (on average 2.5852596314907874) internal successors, (30868), 11940 states have internal predecessors, (30868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:13,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 30868 transitions. [2021-06-05 06:10:13,803 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 30868 transitions. Word has length 34 [2021-06-05 06:10:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:13,803 INFO L482 AbstractCegarLoop]: Abstraction has 11941 states and 30868 transitions. [2021-06-05 06:10:13,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 30868 transitions. [2021-06-05 06:10:13,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:13,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:13,814 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:14,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 06:10:14,014 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1087321293, now seen corresponding path program 113 times [2021-06-05 06:10:14,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:14,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770529540] [2021-06-05 06:10:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:14,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:14,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770529540] [2021-06-05 06:10:14,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770529540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:14,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077215180] [2021-06-05 06:10:14,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:14,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:10:14,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:14,458 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:10:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:14,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:14,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:14,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:14,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:14,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:14,944 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 85 treesize of output 7 [2021-06-05 06:10:14,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:10:14,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:14,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:10:14,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:10:14,969 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:14,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077215180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:14,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:14,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 06:10:14,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906680214] [2021-06-05 06:10:14,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:10:14,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:14,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:10:14,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:10:14,970 INFO L87 Difference]: Start difference. First operand 11941 states and 30868 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:17,070 INFO L93 Difference]: Finished difference Result 14838 states and 37704 transitions. [2021-06-05 06:10:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 06:10:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:10:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:17,089 INFO L225 Difference]: With dead ends: 14838 [2021-06-05 06:10:17,089 INFO L226 Difference]: Without dead ends: 14775 [2021-06-05 06:10:17,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2074.1ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 06:10:17,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2021-06-05 06:10:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 11996. [2021-06-05 06:10:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 2.5838265944143393) internal successors, (30993), 11995 states have internal predecessors, (30993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 30993 transitions. [2021-06-05 06:10:17,256 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 30993 transitions. Word has length 34 [2021-06-05 06:10:17,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:17,256 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 30993 transitions. [2021-06-05 06:10:17,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:17,256 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 30993 transitions. [2021-06-05 06:10:17,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:17,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:17,265 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:17,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:17,466 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:17,466 INFO L82 PathProgramCache]: Analyzing trace with hash -44039697, now seen corresponding path program 114 times [2021-06-05 06:10:17,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:17,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35025337] [2021-06-05 06:10:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:17,718 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-06-05 06:10:17,902 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:17,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35025337] [2021-06-05 06:10:17,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35025337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:17,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850569203] [2021-06-05 06:10:17,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:17,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:10:17,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:17,929 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:10:17,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:18,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:18,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:18,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:18,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:18,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:18,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-06-05 06:10:18,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:10:18,739 INFO L628 ElimStorePlain]: treesize reduction 178, result has 16.4 percent of original size [2021-06-05 06:10:18,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:10:18,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:22 [2021-06-05 06:10:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:18,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850569203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:18,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:18,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-06-05 06:10:18,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718357515] [2021-06-05 06:10:18,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 06:10:18,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:18,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 06:10:18,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 06:10:18,806 INFO L87 Difference]: Start difference. First operand 11996 states and 30993 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:21,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:21,316 INFO L93 Difference]: Finished difference Result 15015 states and 38117 transitions. [2021-06-05 06:10:21,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:10:21,317 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:10:21,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:21,374 INFO L225 Difference]: With dead ends: 15015 [2021-06-05 06:10:21,374 INFO L226 Difference]: Without dead ends: 14957 [2021-06-05 06:10:21,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2437.5ms TimeCoverageRelationStatistics Valid=580, Invalid=3452, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 06:10:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-06-05 06:10:21,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 12104. [2021-06-05 06:10:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5794431132776996) internal successors, (31219), 12103 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31219 transitions. [2021-06-05 06:10:21,522 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31219 transitions. Word has length 34 [2021-06-05 06:10:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:21,522 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 31219 transitions. [2021-06-05 06:10:21,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31219 transitions. [2021-06-05 06:10:21,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:21,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:21,532 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:21,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 06:10:21,732 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:21,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:21,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1445312427, now seen corresponding path program 115 times [2021-06-05 06:10:21,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:21,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929211906] [2021-06-05 06:10:21,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:22,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:22,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929211906] [2021-06-05 06:10:22,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929211906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:22,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412946783] [2021-06-05 06:10:22,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:22,112 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:10:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:22,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:22,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:22,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:22,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:22,480 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 85 treesize of output 7 [2021-06-05 06:10:22,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:10:22,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:22,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:10:22,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:10:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:22,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412946783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:22,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:22,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 06:10:22,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683089531] [2021-06-05 06:10:22,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:10:22,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:22,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:10:22,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:10:22,506 INFO L87 Difference]: Start difference. First operand 12104 states and 31219 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:24,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:24,945 INFO L93 Difference]: Finished difference Result 15455 states and 39132 transitions. [2021-06-05 06:10:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 06:10:24,945 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:10:24,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:24,963 INFO L225 Difference]: With dead ends: 15455 [2021-06-05 06:10:24,963 INFO L226 Difference]: Without dead ends: 15407 [2021-06-05 06:10:24,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2143.7ms TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:10:24,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15407 states. [2021-06-05 06:10:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15407 to 12292. [2021-06-05 06:10:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12292 states, 12291 states have (on average 2.5755430803026607) internal successors, (31656), 12291 states have internal predecessors, (31656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:25,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12292 states to 12292 states and 31656 transitions. [2021-06-05 06:10:25,166 INFO L78 Accepts]: Start accepts. Automaton has 12292 states and 31656 transitions. Word has length 34 [2021-06-05 06:10:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:25,166 INFO L482 AbstractCegarLoop]: Abstraction has 12292 states and 31656 transitions. [2021-06-05 06:10:25,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 12292 states and 31656 transitions. [2021-06-05 06:10:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:25,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:25,175 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:25,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable613,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:25,376 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:25,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:25,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1347182557, now seen corresponding path program 116 times [2021-06-05 06:10:25,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:25,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641912147] [2021-06-05 06:10:25,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:25,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:25,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641912147] [2021-06-05 06:10:25,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641912147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:25,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771491919] [2021-06-05 06:10:25,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:10:25,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:10:25,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:25,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:10:25,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:26,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:26,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:26,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:26,086 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 85 treesize of output 7 [2021-06-05 06:10:26,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:10:26,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:26,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:10:26,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:10:26,114 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:26,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771491919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:26,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:26,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-05 06:10:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281123211] [2021-06-05 06:10:26,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 06:10:26,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:26,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 06:10:26,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 06:10:26,115 INFO L87 Difference]: Start difference. First operand 12292 states and 31656 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:28,744 INFO L93 Difference]: Finished difference Result 16292 states and 41059 transitions. [2021-06-05 06:10:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:10:28,745 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:10:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:28,767 INFO L225 Difference]: With dead ends: 16292 [2021-06-05 06:10:28,767 INFO L226 Difference]: Without dead ends: 16283 [2021-06-05 06:10:28,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2487.1ms TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 06:10:28,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2021-06-05 06:10:28,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 12441. [2021-06-05 06:10:28,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12441 states, 12440 states have (on average 2.5761254019292603) internal successors, (32047), 12440 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12441 states to 12441 states and 32047 transitions. [2021-06-05 06:10:28,961 INFO L78 Accepts]: Start accepts. Automaton has 12441 states and 32047 transitions. Word has length 34 [2021-06-05 06:10:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:28,961 INFO L482 AbstractCegarLoop]: Abstraction has 12441 states and 32047 transitions. [2021-06-05 06:10:28,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 12441 states and 32047 transitions. [2021-06-05 06:10:28,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:28,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:28,971 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:29,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:29,171 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:29,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:29,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1755703351, now seen corresponding path program 117 times [2021-06-05 06:10:29,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:29,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700604122] [2021-06-05 06:10:29,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:10:29,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:29,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700604122] [2021-06-05 06:10:29,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700604122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:29,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502730858] [2021-06-05 06:10:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:29,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:10:29,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:29,448 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:10:29,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:30,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:30,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:30,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:30,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:30,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:30,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:30,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:30,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:30,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:30,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 85 treesize of output 171 [2021-06-05 06:10:30,970 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-06-05 06:10:31,085 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-06-05 06:10:31,375 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 300 [2021-06-05 06:10:31,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-05 06:10:31,848 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 24 [2021-06-05 06:10:31,848 INFO L628 ElimStorePlain]: treesize reduction 1674, result has 2.0 percent of original size [2021-06-05 06:10:31,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:10:31,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-06-05 06:10:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:31,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502730858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:31,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:31,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-06-05 06:10:31,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241738328] [2021-06-05 06:10:31,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 06:10:31,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:31,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 06:10:31,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-05 06:10:31,904 INFO L87 Difference]: Start difference. First operand 12441 states and 32047 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-06-05 06:10:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:41,387 INFO L93 Difference]: Finished difference Result 16489 states and 41364 transitions. [2021-06-05 06:10:41,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 06:10:41,388 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) Word has length 34 [2021-06-05 06:10:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:41,412 INFO L225 Difference]: With dead ends: 16489 [2021-06-05 06:10:41,412 INFO L226 Difference]: Without dead ends: 16467 [2021-06-05 06:10:41,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 4315.8ms TimeCoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 06:10:41,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2021-06-05 06:10:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 12451. [2021-06-05 06:10:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.575421686746988) internal successors, (32064), 12450 states have internal predecessors, (32064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:41,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 32064 transitions. [2021-06-05 06:10:41,604 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 32064 transitions. Word has length 34 [2021-06-05 06:10:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:41,604 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 32064 transitions. [2021-06-05 06:10:41,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-06-05 06:10:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 32064 transitions. [2021-06-05 06:10:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:41,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:41,613 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:41,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-06-05 06:10:41,817 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:41,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:41,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1270909581, now seen corresponding path program 118 times [2021-06-05 06:10:41,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:41,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416730597] [2021-06-05 06:10:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:41,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:10:42,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:42,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416730597] [2021-06-05 06:10:42,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416730597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:42,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273175527] [2021-06-05 06:10:42,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:42,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:10:42,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:42,074 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:10:42,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:42,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:42,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:42,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:42,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:42,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:42,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:42,463 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 85 treesize of output 7 [2021-06-05 06:10:42,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:10:42,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:42,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:10:42,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:10:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:42,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273175527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:42,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:42,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 06:10:42,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216117826] [2021-06-05 06:10:42,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:10:42,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:42,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:10:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:10:42,500 INFO L87 Difference]: Start difference. First operand 12451 states and 32064 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 06:10:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:44,727 INFO L93 Difference]: Finished difference Result 16411 states and 41283 transitions. [2021-06-05 06:10:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:10:44,728 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:10:44,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:44,748 INFO L225 Difference]: With dead ends: 16411 [2021-06-05 06:10:44,749 INFO L226 Difference]: Without dead ends: 16378 [2021-06-05 06:10:44,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1965.8ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 06:10:44,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2021-06-05 06:10:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 12565. [2021-06-05 06:10:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 2.572110792741165) internal successors, (32316), 12564 states have internal predecessors, (32316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 32316 transitions. [2021-06-05 06:10:44,936 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 32316 transitions. Word has length 34 [2021-06-05 06:10:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:44,936 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 32316 transitions. [2021-06-05 06:10:44,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 06:10:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 32316 transitions. [2021-06-05 06:10:44,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:44,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:44,946 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:45,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:45,146 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:45,146 INFO L82 PathProgramCache]: Analyzing trace with hash 954034479, now seen corresponding path program 119 times [2021-06-05 06:10:45,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:45,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491780269] [2021-06-05 06:10:45,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:10:45,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491780269] [2021-06-05 06:10:45,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491780269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:45,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749300636] [2021-06-05 06:10:45,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:10:45,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 06:10:45,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:45,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:10:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:45,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:45,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:45,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:45,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:45,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:45,744 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 85 treesize of output 7 [2021-06-05 06:10:45,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:10:45,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:45,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:10:45,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:10:45,771 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:45,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749300636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:45,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:45,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 06:10:45,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663105261] [2021-06-05 06:10:45,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:10:45,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:45,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:10:45,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:10:45,772 INFO L87 Difference]: Start difference. First operand 12565 states and 32316 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 06:10:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:48,675 INFO L93 Difference]: Finished difference Result 16814 states and 42191 transitions. [2021-06-05 06:10:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 06:10:48,675 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:10:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:48,695 INFO L225 Difference]: With dead ends: 16814 [2021-06-05 06:10:48,695 INFO L226 Difference]: Without dead ends: 16795 [2021-06-05 06:10:48,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2491.9ms TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 06:10:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-06-05 06:10:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 12569. [2021-06-05 06:10:48,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12569 states, 12568 states have (on average 2.5725652450668366) internal successors, (32332), 12568 states have internal predecessors, (32332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:48,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12569 states to 12569 states and 32332 transitions. [2021-06-05 06:10:48,859 INFO L78 Accepts]: Start accepts. Automaton has 12569 states and 32332 transitions. Word has length 34 [2021-06-05 06:10:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:48,859 INFO L482 AbstractCegarLoop]: Abstraction has 12569 states and 32332 transitions. [2021-06-05 06:10:48,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 06:10:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 12569 states and 32332 transitions. [2021-06-05 06:10:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:48,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:48,868 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:49,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable868,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:49,068 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:49,068 INFO L82 PathProgramCache]: Analyzing trace with hash -766181841, now seen corresponding path program 120 times [2021-06-05 06:10:49,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:49,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676897371] [2021-06-05 06:10:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:10:49,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:49,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676897371] [2021-06-05 06:10:49,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676897371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:49,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41986915] [2021-06-05 06:10:49,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:49,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 06:10:49,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:49,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:10:49,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:50,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:50,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:50,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:50,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:50,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:50,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-06-05 06:10:50,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-05 06:10:50,158 INFO L628 ElimStorePlain]: treesize reduction 220, result has 13.7 percent of original size [2021-06-05 06:10:50,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 06:10:50,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:16 [2021-06-05 06:10:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:50,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41986915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:50,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:50,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-06-05 06:10:50,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299572920] [2021-06-05 06:10:50,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:10:50,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:50,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:10:50,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:10:50,220 INFO L87 Difference]: Start difference. First operand 12569 states and 32332 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:52,639 INFO L93 Difference]: Finished difference Result 15950 states and 40250 transitions. [2021-06-05 06:10:52,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 06:10:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2021-06-05 06:10:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:52,659 INFO L225 Difference]: With dead ends: 15950 [2021-06-05 06:10:52,660 INFO L226 Difference]: Without dead ends: 15904 [2021-06-05 06:10:52,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2316.2ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 06:10:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15904 states. [2021-06-05 06:10:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15904 to 12573. [2021-06-05 06:10:52,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12573 states, 12572 states have (on average 2.5706331530384983) internal successors, (32318), 12572 states have internal predecessors, (32318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12573 states to 12573 states and 32318 transitions. [2021-06-05 06:10:52,841 INFO L78 Accepts]: Start accepts. Automaton has 12573 states and 32318 transitions. Word has length 34 [2021-06-05 06:10:52,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:52,841 INFO L482 AbstractCegarLoop]: Abstraction has 12573 states and 32318 transitions. [2021-06-05 06:10:52,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 12573 states and 32318 transitions. [2021-06-05 06:10:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:52,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:52,851 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:53,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 06:10:53,052 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash -769209587, now seen corresponding path program 121 times [2021-06-05 06:10:53,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:53,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089417460] [2021-06-05 06:10:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:10:53,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:53,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089417460] [2021-06-05 06:10:53,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089417460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:53,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793752119] [2021-06-05 06:10:53,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:53,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:53,305 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:10:53,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:53,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:53,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:53,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:53,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:53,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:53,648 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 85 treesize of output 7 [2021-06-05 06:10:53,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:10:53,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:53,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:10:53,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:10:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:53,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793752119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:53,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:53,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 06:10:53,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259337543] [2021-06-05 06:10:53,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 06:10:53,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:53,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 06:10:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-05 06:10:53,674 INFO L87 Difference]: Start difference. First operand 12573 states and 32318 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-06-05 06:10:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:55,798 INFO L93 Difference]: Finished difference Result 13633 states and 34575 transitions. [2021-06-05 06:10:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 06:10:55,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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 34 [2021-06-05 06:10:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:55,816 INFO L225 Difference]: With dead ends: 13633 [2021-06-05 06:10:55,816 INFO L226 Difference]: Without dead ends: 13606 [2021-06-05 06:10:55,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1935.9ms TimeCoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:10:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2021-06-05 06:10:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12605. [2021-06-05 06:10:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12605 states, 12604 states have (on average 2.5693430656934306) internal successors, (32384), 12604 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12605 states to 12605 states and 32384 transitions. [2021-06-05 06:10:56,024 INFO L78 Accepts]: Start accepts. Automaton has 12605 states and 32384 transitions. Word has length 34 [2021-06-05 06:10:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:56,024 INFO L482 AbstractCegarLoop]: Abstraction has 12605 states and 32384 transitions. [2021-06-05 06:10:56,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 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) [2021-06-05 06:10:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 12605 states and 32384 transitions. [2021-06-05 06:10:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:56,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:56,034 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:56,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:56,235 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash -915560657, now seen corresponding path program 122 times [2021-06-05 06:10:56,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:56,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785855465] [2021-06-05 06:10:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:10:56,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:56,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785855465] [2021-06-05 06:10:56,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785855465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:56,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132862210] [2021-06-05 06:10:56,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:10:56,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:10:56,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:10:56,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:10:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:10:56,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:56,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:56,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:56,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:56,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:10:56,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:10:56,899 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 85 treesize of output 7 [2021-06-05 06:10:56,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:10:56,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:10:56,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:10:56,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:10:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:10:56,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132862210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:56,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:10:56,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 06:10:56,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580040477] [2021-06-05 06:10:56,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:10:56,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:10:56,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:10:56,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:10:56,936 INFO L87 Difference]: Start difference. First operand 12605 states and 32384 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:10:59,114 INFO L93 Difference]: Finished difference Result 16746 states and 42145 transitions. [2021-06-05 06:10:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 06:10:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:10:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:10:59,137 INFO L225 Difference]: With dead ends: 16746 [2021-06-05 06:10:59,137 INFO L226 Difference]: Without dead ends: 16713 [2021-06-05 06:10:59,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2033.7ms TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:10:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16713 states. [2021-06-05 06:10:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16713 to 12629. [2021-06-05 06:10:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5682610072853977) internal successors, (32432), 12628 states have internal predecessors, (32432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32432 transitions. [2021-06-05 06:10:59,399 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32432 transitions. Word has length 34 [2021-06-05 06:10:59,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:10:59,399 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32432 transitions. [2021-06-05 06:10:59,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:10:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32432 transitions. [2021-06-05 06:10:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:10:59,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:10:59,409 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:10:59,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-05 06:10:59,613 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:10:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:10:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1309383403, now seen corresponding path program 123 times [2021-06-05 06:10:59,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:10:59,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107169060] [2021-06-05 06:10:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:10:59,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:10:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:10:59,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:10:59,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107169060] [2021-06-05 06:10:59,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107169060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:10:59,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738775026] [2021-06-05 06:10:59,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 06:11:00,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 06:11:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:00,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 06:11:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:00,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:00,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:00,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 97 treesize of output 247 [2021-06-05 06:11:01,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 06:11:01,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:01,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:11:01,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:122, output treesize:74 [2021-06-05 06:11:01,670 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:01,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738775026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:01,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:11:01,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-06-05 06:11:01,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427768782] [2021-06-05 06:11:01,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 06:11:01,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:11:01,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 06:11:01,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 06:11:01,671 INFO L87 Difference]: Start difference. First operand 12629 states and 32432 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:06,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:06,338 INFO L93 Difference]: Finished difference Result 16941 states and 42462 transitions. [2021-06-05 06:11:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 06:11:06,338 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:11:06,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:06,362 INFO L225 Difference]: With dead ends: 16941 [2021-06-05 06:11:06,362 INFO L226 Difference]: Without dead ends: 16910 [2021-06-05 06:11:06,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 4176.6ms TimeCoverageRelationStatistics Valid=1133, Invalid=9373, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 06:11:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16910 states. [2021-06-05 06:11:06,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16910 to 12629. [2021-06-05 06:11:06,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5688945201140325) internal successors, (32440), 12628 states have internal predecessors, (32440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32440 transitions. [2021-06-05 06:11:06,603 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32440 transitions. Word has length 34 [2021-06-05 06:11:06,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:06,603 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32440 transitions. [2021-06-05 06:11:06,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32440 transitions. [2021-06-05 06:11:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:11:06,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:06,613 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:06,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-06-05 06:11:06,817 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 92531981, now seen corresponding path program 124 times [2021-06-05 06:11:06,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:06,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658314762] [2021-06-05 06:11:06,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 06:11:07,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:07,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658314762] [2021-06-05 06:11:07,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658314762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:07,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561856667] [2021-06-05 06:11:07,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:11:07,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:11:07,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:07,105 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:11:07,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:07,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:07,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:07,457 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 85 treesize of output 7 [2021-06-05 06:11:07,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:07,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:07,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:11:07,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:11:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:07,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561856667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:07,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:11:07,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-05 06:11:07,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218473729] [2021-06-05 06:11:07,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 06:11:07,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:11:07,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 06:11:07,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 06:11:07,486 INFO L87 Difference]: Start difference. First operand 12629 states and 32440 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 06:11:09,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:09,808 INFO L93 Difference]: Finished difference Result 13890 states and 35182 transitions. [2021-06-05 06:11:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 06:11:09,809 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:11:09,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:09,827 INFO L225 Difference]: With dead ends: 13890 [2021-06-05 06:11:09,827 INFO L226 Difference]: Without dead ends: 13872 [2021-06-05 06:11:09,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2101.9ms TimeCoverageRelationStatistics Valid=541, Invalid=3881, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 06:11:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2021-06-05 06:11:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 12614. [2021-06-05 06:11:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 2.568857527947356) internal successors, (32401), 12613 states have internal predecessors, (32401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:10,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 32401 transitions. [2021-06-05 06:11:10,044 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 32401 transitions. Word has length 34 [2021-06-05 06:11:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:10,044 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 32401 transitions. [2021-06-05 06:11:10,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-06-05 06:11:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 32401 transitions. [2021-06-05 06:11:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:11:10,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:10,054 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:10,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable941 [2021-06-05 06:11:10,254 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:10,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:10,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2032929557, now seen corresponding path program 125 times [2021-06-05 06:11:10,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:10,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35794555] [2021-06-05 06:11:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:10,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:10,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35794555] [2021-06-05 06:11:10,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35794555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:10,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333366963] [2021-06-05 06:11:10,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:11:10,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 06:11:10,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:10,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-05 06:11:10,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:10,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:10,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:10,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:10,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:10,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:10,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:10,868 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 85 treesize of output 7 [2021-06-05 06:11:10,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:11:10,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:10,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:11:10,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-05 06:11:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:10,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333366963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:10,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:11:10,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 06:11:10,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18094030] [2021-06-05 06:11:10,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 06:11:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:11:10,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 06:11:10,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 06:11:10,897 INFO L87 Difference]: Start difference. First operand 12614 states and 32401 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:11:12,201 INFO L93 Difference]: Finished difference Result 13122 states and 33247 transitions. [2021-06-05 06:11:12,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 06:11:12,201 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 06:11:12,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:11:12,217 INFO L225 Difference]: With dead ends: 13122 [2021-06-05 06:11:12,217 INFO L226 Difference]: Without dead ends: 13095 [2021-06-05 06:11:12,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1090.1ms TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 06:11:12,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-06-05 06:11:12,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 12617. [2021-06-05 06:11:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 12616 states have (on average 2.565472415979708) internal successors, (32366), 12616 states have internal predecessors, (32366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 32366 transitions. [2021-06-05 06:11:12,408 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 32366 transitions. Word has length 34 [2021-06-05 06:11:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:11:12,409 INFO L482 AbstractCegarLoop]: Abstraction has 12617 states and 32366 transitions. [2021-06-05 06:11:12,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:11:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 32366 transitions. [2021-06-05 06:11:12,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 06:11:12,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:11:12,417 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 06:11:12,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable942,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:11:12,618 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:11:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:11:12,618 INFO L82 PathProgramCache]: Analyzing trace with hash 192014503, now seen corresponding path program 126 times [2021-06-05 06:11:12,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:11:12,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113686748] [2021-06-05 06:11:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:11:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:11:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 06:11:12,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:11:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113686748] [2021-06-05 06:11:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113686748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:11:12,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446179679] [2021-06-05 06:11:12,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:11:12,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 06:11:12,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:11:12,892 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-05 06:11:12,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:11:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:13,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:13,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:13,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:13,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:13,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:11:13,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:11:13,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:11:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 89 treesize of output 241 [2021-06-05 06:11:15,242 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 403 [2021-06-05 06:11:15,684 WARN L205 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-06-05 06:11:16,186 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-06-05 06:11:16,741 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 498 [2021-06-05 06:11:17,271 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 528 [2021-06-05 06:11:18,618 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 579 [2021-06-05 06:11:19,193 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 712 [2021-06-05 06:11:20,023 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 898 [2021-06-05 06:11:20,722 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 235 [2021-06-05 06:11:21,289 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 184 [2021-06-05 06:11:21,436 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 200 [2021-06-05 06:11:21,790 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 366 [2021-06-05 06:11:23,302 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-06-05 06:11:24,747 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-06-05 06:11:26,578 WARN L205 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 1240 DAG size of output: 1146 [2021-06-05 06:11:28,615 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1682 [2021-06-05 06:11:29,960 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 446 [2021-06-05 06:11:30,878 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 330 [2021-06-05 06:12:07,187 WARN L205 SmtUtils]: Spent 36.20 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1622 [2021-06-05 06:16:59,571 WARN L205 SmtUtils]: Spent 4.87 m on a formula simplification. DAG size of input: 2100 DAG size of output: 1621 [2021-06-05 06:19:05,558 WARN L205 SmtUtils]: Spent 2.10 m on a formula simplification. DAG size of input: 2109 DAG size of output: 1630 [2021-06-05 06:19:28,384 WARN L205 SmtUtils]: Spent 22.82 s on a formula simplification. DAG size of input: 1100 DAG size of output: 1363 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown