/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:55:56,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:55:56,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:55:56,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:55:56,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 19:55:56,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 19:55:56,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 19:55:56,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 19:55:56,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 19:55:56,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 19:55:56,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 19:55:56,166 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 19:55:56,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 19:55:56,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 19:55:56,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 19:55:56,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 19:55:56,172 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 19:55:56,191 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-13 19:55:56,208 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:55:56,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:55:56,208 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:55:56,208 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:55:56,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:55:56,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:55:56,209 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:55:56,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:55:56,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:55:56,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:55:56,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:55:56,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:55:56,211 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:55:56,211 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:55:56,211 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:55:56,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:55:56,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:55:56,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:55:56,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:55:56,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:55:56,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:55:56,212 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:55:56,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:55:56,212 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:55:56,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:55:56,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:55:56,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:55:56,433 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:55:56,438 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:55:56,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl [2021-07-13 19:55:56,439 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/channel-sum.wvr.bpl' [2021-07-13 19:55:56,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:55:56,475 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:55:56,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:55:56,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:55:56,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:55:56,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,489 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:55:56,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:55:56,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:55:56,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:55:56,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... [2021-07-13 19:55:56,510 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:55:56,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:55:56,511 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:55:56,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:55:56,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:55:56,558 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:55:56,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:55:56,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:55:56,558 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:55:56,559 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:55:56,559 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:55:56,559 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:55:56,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:55:56,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:55:56,559 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:55:56,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:55:56,681 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-13 19:55:56,682 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-13 19:55:56,683 INFO L202 PluginConnector]: Adding new model channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:55:56 BoogieIcfgContainer [2021-07-13 19:55:56,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:55:56,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:55:56,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:55:56,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:55:56,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:55:56" (1/2) ... [2021-07-13 19:55:56,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388b9764 and model type channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:55:56, skipping insertion in model container [2021-07-13 19:55:56,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "channel-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:55:56" (2/2) ... [2021-07-13 19:55:56,688 INFO L111 eAbstractionObserver]: Analyzing ICFG channel-sum.wvr.bpl [2021-07-13 19:55:56,691 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:55:56,691 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:55:56,691 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:55:56,692 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:55:56,710 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:55:56,725 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:55:56,737 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:55:56,738 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:55:56,738 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:55:56,738 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:55:56,738 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:55:56,738 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:55:56,738 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:55:56,738 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:55:56,744 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 26 places, 22 transitions, 60 flow [2021-07-13 19:55:56,753 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,755 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:55:56,759 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:56,760 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:56,760 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:56,763 INFO L82 PathProgramCache]: Analyzing trace with hash 10984786, now seen corresponding path program 1 times [2021-07-13 19:55:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:56,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652118084] [2021-07-13 19:55:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:56,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:56,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652118084] [2021-07-13 19:55:56,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652118084] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:55:56,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:55:56,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:55:56,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741460275] [2021-07-13 19:55:56,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:55:56,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:56,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:55:56,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:55:56,914 INFO L87 Difference]: Start difference. First operand has 30 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:56,927 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2021-07-13 19:55:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:55:56,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-07-13 19:55:56,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:56,934 INFO L225 Difference]: With dead ends: 54 [2021-07-13 19:55:56,934 INFO L226 Difference]: Without dead ends: 42 [2021-07-13 19:55:56,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:55:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-07-13 19:55:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-07-13 19:55:56,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 70 transitions. [2021-07-13 19:55:56,956 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 70 transitions. Word has length 11 [2021-07-13 19:55:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:56,957 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 70 transitions. [2021-07-13 19:55:56,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 70 transitions. [2021-07-13 19:55:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:55:56,958 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:56,958 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:56,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:55:56,958 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:56,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1844506957, now seen corresponding path program 1 times [2021-07-13 19:55:56,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:56,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070791087] [2021-07-13 19:55:56,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:56,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:56,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070791087] [2021-07-13 19:55:56,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070791087] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:55:56,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:55:56,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:55:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613056976] [2021-07-13 19:55:56,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:55:56,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:56,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:55:56,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:55:56,981 INFO L87 Difference]: Start difference. First operand 36 states and 70 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:56,988 INFO L93 Difference]: Finished difference Result 37 states and 68 transitions. [2021-07-13 19:55:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:55:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:55:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:56,989 INFO L225 Difference]: With dead ends: 37 [2021-07-13 19:55:56,989 INFO L226 Difference]: Without dead ends: 36 [2021-07-13 19:55:56,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:55:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-07-13 19:55:56,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-07-13 19:55:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-07-13 19:55:56,994 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 13 [2021-07-13 19:55:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:56,994 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-07-13 19:55:56,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-07-13 19:55:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:55:56,995 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:56,995 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:56,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:55:56,995 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash 244145385, now seen corresponding path program 1 times [2021-07-13 19:55:56,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:56,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617714825] [2021-07-13 19:55:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:57,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:57,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617714825] [2021-07-13 19:55:57,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617714825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602899976] [2021-07-13 19:55:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:55:57,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:57,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-13 19:55:57,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:57,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:57,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:57,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-07-13 19:55:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:57,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602899976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:57,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-13 19:55:57,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815447644] [2021-07-13 19:55:57,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:55:57,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:57,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:55:57,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:55:57,252 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:57,292 INFO L93 Difference]: Finished difference Result 67 states and 134 transitions. [2021-07-13 19:55:57,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:55:57,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:55:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:57,293 INFO L225 Difference]: With dead ends: 67 [2021-07-13 19:55:57,293 INFO L226 Difference]: Without dead ends: 56 [2021-07-13 19:55:57,293 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:55:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-13 19:55:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-07-13 19:55:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2021-07-13 19:55:57,304 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 16 [2021-07-13 19:55:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:57,304 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2021-07-13 19:55:57,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2021-07-13 19:55:57,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:55:57,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:57,305 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:57,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-13 19:55:57,505 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:57,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1749319479, now seen corresponding path program 1 times [2021-07-13 19:55:57,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:57,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109950757] [2021-07-13 19:55:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:55:57,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:57,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109950757] [2021-07-13 19:55:57,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109950757] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:55:57,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:55:57,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:55:57,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438752630] [2021-07-13 19:55:57,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:55:57,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:57,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:55:57,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:55:57,518 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:57,523 INFO L93 Difference]: Finished difference Result 52 states and 101 transitions. [2021-07-13 19:55:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:55:57,523 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-13 19:55:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:57,524 INFO L225 Difference]: With dead ends: 52 [2021-07-13 19:55:57,524 INFO L226 Difference]: Without dead ends: 52 [2021-07-13 19:55:57,524 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:55:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-07-13 19:55:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-07-13 19:55:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-07-13 19:55:57,528 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 16 [2021-07-13 19:55:57,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:57,528 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-07-13 19:55:57,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-07-13 19:55:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:55:57,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:57,528 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:57,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:55:57,529 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1115470710, now seen corresponding path program 2 times [2021-07-13 19:55:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:57,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161991205] [2021-07-13 19:55:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:57,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:57,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161991205] [2021-07-13 19:55:57,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161991205] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:55:57,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:55:57,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:55:57,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990183944] [2021-07-13 19:55:57,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:55:57,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:55:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:55:57,555 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:57,569 INFO L93 Difference]: Finished difference Result 116 states and 226 transitions. [2021-07-13 19:55:57,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:55:57,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:55:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:57,575 INFO L225 Difference]: With dead ends: 116 [2021-07-13 19:55:57,575 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:55:57,575 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:55:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:55:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-07-13 19:55:57,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-07-13 19:55:57,587 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 18 [2021-07-13 19:55:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:57,587 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-07-13 19:55:57,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-07-13 19:55:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:55:57,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:57,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:57,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:55:57,588 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash -686636110, now seen corresponding path program 3 times [2021-07-13 19:55:57,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:57,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764199201] [2021-07-13 19:55:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:55:57,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:57,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764199201] [2021-07-13 19:55:57,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764199201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112517636] [2021-07-13 19:55:57,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:57,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:55:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:55:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:55:57,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112517636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:57,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:57,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:55:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382899312] [2021-07-13 19:55:57,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:55:57,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:57,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:55:57,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:55:57,677 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:57,689 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2021-07-13 19:55:57,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:55:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:55:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:57,690 INFO L225 Difference]: With dead ends: 118 [2021-07-13 19:55:57,690 INFO L226 Difference]: Without dead ends: 118 [2021-07-13 19:55:57,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:55:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-13 19:55:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-07-13 19:55:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 103 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 213 transitions. [2021-07-13 19:55:57,695 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 213 transitions. Word has length 21 [2021-07-13 19:55:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:57,696 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 213 transitions. [2021-07-13 19:55:57,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 213 transitions. [2021-07-13 19:55:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:55:57,696 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:57,697 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:57,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:57,913 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:57,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:57,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1614866322, now seen corresponding path program 1 times [2021-07-13 19:55:57,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:57,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005157601] [2021-07-13 19:55:57,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:58,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:58,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005157601] [2021-07-13 19:55:58,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005157601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:58,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146044283] [2021-07-13 19:55:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:58,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:58,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:58,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:58,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:58,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-07-13 19:55:58,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:58,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:58,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:58,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-07-13 19:55:58,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:58,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146044283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:58,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:58,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:55:58,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519834823] [2021-07-13 19:55:58,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:55:58,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:58,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:55:58,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:55:58,375 INFO L87 Difference]: Start difference. First operand 104 states and 213 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:58,449 INFO L93 Difference]: Finished difference Result 175 states and 364 transitions. [2021-07-13 19:55:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:55:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:55:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:58,451 INFO L225 Difference]: With dead ends: 175 [2021-07-13 19:55:58,451 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:55:58,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:55:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:55:58,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2021-07-13 19:55:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.0508474576271185) internal successors, (242), 118 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 242 transitions. [2021-07-13 19:55:58,470 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 242 transitions. Word has length 21 [2021-07-13 19:55:58,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:58,471 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 242 transitions. [2021-07-13 19:55:58,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 242 transitions. [2021-07-13 19:55:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:55:58,472 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:58,472 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:58,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:58,672 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash 466490442, now seen corresponding path program 2 times [2021-07-13 19:55:58,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:58,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531006018] [2021-07-13 19:55:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:58,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:58,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531006018] [2021-07-13 19:55:58,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531006018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:58,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237378040] [2021-07-13 19:55:58,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:58,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:55:58,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:58,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:55:58,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:55:58,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2021-07-13 19:55:58,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:58,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:58,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:58,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:12 [2021-07-13 19:55:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:58,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237378040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:58,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:58,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-13 19:55:58,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434179439] [2021-07-13 19:55:58,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:55:58,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:58,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:55:58,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:55:58,976 INFO L87 Difference]: Start difference. First operand 119 states and 242 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:59,033 INFO L93 Difference]: Finished difference Result 209 states and 432 transitions. [2021-07-13 19:55:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:55:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:55:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:59,034 INFO L225 Difference]: With dead ends: 209 [2021-07-13 19:55:59,034 INFO L226 Difference]: Without dead ends: 190 [2021-07-13 19:55:59,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:55:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-13 19:55:59,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 123. [2021-07-13 19:55:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.040983606557377) internal successors, (249), 122 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 249 transitions. [2021-07-13 19:55:59,038 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 249 transitions. Word has length 21 [2021-07-13 19:55:59,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:59,038 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 249 transitions. [2021-07-13 19:55:59,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,038 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 249 transitions. [2021-07-13 19:55:59,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:55:59,039 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:59,039 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:59,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:59,257 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:59,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:59,257 INFO L82 PathProgramCache]: Analyzing trace with hash -870312972, now seen corresponding path program 3 times [2021-07-13 19:55:59,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:59,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597991817] [2021-07-13 19:55:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:59,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:59,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:59,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597991817] [2021-07-13 19:55:59,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597991817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:59,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905095971] [2021-07-13 19:55:59,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:59,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:55:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-13 19:55:59,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:59,459 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-07-13 19:55:59,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 18 [2021-07-13 19:55:59,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:55:59,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:55:59,465 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:12 [2021-07-13 19:55:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:59,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905095971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:59,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:59,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 19:55:59,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226245165] [2021-07-13 19:55:59,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:55:59,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:59,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:55:59,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:55:59,482 INFO L87 Difference]: Start difference. First operand 123 states and 249 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:59,564 INFO L93 Difference]: Finished difference Result 180 states and 370 transitions. [2021-07-13 19:55:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:55:59,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:55:59,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:59,567 INFO L225 Difference]: With dead ends: 180 [2021-07-13 19:55:59,567 INFO L226 Difference]: Without dead ends: 165 [2021-07-13 19:55:59,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:55:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-13 19:55:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2021-07-13 19:55:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.046511627906977) internal successors, (264), 129 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 264 transitions. [2021-07-13 19:55:59,570 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 264 transitions. Word has length 21 [2021-07-13 19:55:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:59,571 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 264 transitions. [2021-07-13 19:55:59,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 264 transitions. [2021-07-13 19:55:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:55:59,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:59,575 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:55:59,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:59,791 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:55:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:55:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1631872213, now seen corresponding path program 4 times [2021-07-13 19:55:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:55:59,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138727704] [2021-07-13 19:55:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:55:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:55:59,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:59,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:55:59,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138727704] [2021-07-13 19:55:59,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138727704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:59,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120779022] [2021-07-13 19:55:59,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:55:59,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:55:59,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:55:59,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:55:59,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:55:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:55:59,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120779022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:55:59,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:55:59,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-07-13 19:55:59,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363561695] [2021-07-13 19:55:59,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:55:59,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:55:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:55:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:55:59,894 INFO L87 Difference]: Start difference. First operand 130 states and 264 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:55:59,908 INFO L93 Difference]: Finished difference Result 267 states and 530 transitions. [2021-07-13 19:55:59,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:55:59,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:55:59,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:55:59,910 INFO L225 Difference]: With dead ends: 267 [2021-07-13 19:55:59,910 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:55:59,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:55:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:55:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 163. [2021-07-13 19:55:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.0925925925925926) internal successors, (339), 162 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 339 transitions. [2021-07-13 19:55:59,915 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 339 transitions. Word has length 23 [2021-07-13 19:55:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:55:59,915 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 339 transitions. [2021-07-13 19:55:59,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:55:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 339 transitions. [2021-07-13 19:55:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:55:59,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:55:59,917 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:00,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:00,125 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:00,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash 979925673, now seen corresponding path program 5 times [2021-07-13 19:56:00,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:00,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988088058] [2021-07-13 19:56:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:00,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:00,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988088058] [2021-07-13 19:56:00,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988088058] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:00,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937874543] [2021-07-13 19:56:00,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:00,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:00,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:00,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:00,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:00,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:00,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:00,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:00,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:00,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:00,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:00,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:00,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:00,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:00,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:00,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937874543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:00,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:00,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:56:00,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894013825] [2021-07-13 19:56:00,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:56:00,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:00,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:56:00,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:56:00,575 INFO L87 Difference]: Start difference. First operand 163 states and 339 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:00,697 INFO L93 Difference]: Finished difference Result 337 states and 691 transitions. [2021-07-13 19:56:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:56:00,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:00,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:00,699 INFO L225 Difference]: With dead ends: 337 [2021-07-13 19:56:00,699 INFO L226 Difference]: Without dead ends: 264 [2021-07-13 19:56:00,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 248.5ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-07-13 19:56:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 202. [2021-07-13 19:56:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.0696517412935322) internal successors, (416), 201 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 416 transitions. [2021-07-13 19:56:00,704 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 416 transitions. Word has length 26 [2021-07-13 19:56:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:00,704 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 416 transitions. [2021-07-13 19:56:00,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 416 transitions. [2021-07-13 19:56:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:00,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:00,704 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:00,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:00,921 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash -494046431, now seen corresponding path program 6 times [2021-07-13 19:56:00,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:00,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344034148] [2021-07-13 19:56:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:00,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:01,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344034148] [2021-07-13 19:56:01,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344034148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:01,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870314904] [2021-07-13 19:56:01,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:01,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:01,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:01,127 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:01,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:01,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:01,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:01,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:01,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:01,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:01,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:01,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:01,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:01,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:01,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:01,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:01,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870314904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:01,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:01,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:56:01,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896937975] [2021-07-13 19:56:01,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:01,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:01,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:01,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:01,364 INFO L87 Difference]: Start difference. First operand 202 states and 416 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:01,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:01,462 INFO L93 Difference]: Finished difference Result 375 states and 785 transitions. [2021-07-13 19:56:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:56:01,463 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:01,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:01,465 INFO L225 Difference]: With dead ends: 375 [2021-07-13 19:56:01,465 INFO L226 Difference]: Without dead ends: 339 [2021-07-13 19:56:01,465 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-13 19:56:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 214. [2021-07-13 19:56:01,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.056338028169014) internal successors, (438), 213 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:01,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 438 transitions. [2021-07-13 19:56:01,470 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 438 transitions. Word has length 26 [2021-07-13 19:56:01,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:01,472 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 438 transitions. [2021-07-13 19:56:01,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 438 transitions. [2021-07-13 19:56:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:01,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:01,473 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:01,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 19:56:01,689 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:01,689 INFO L82 PathProgramCache]: Analyzing trace with hash 960569099, now seen corresponding path program 7 times [2021-07-13 19:56:01,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:01,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935434787] [2021-07-13 19:56:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:01,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:01,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935434787] [2021-07-13 19:56:01,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935434787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:01,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877569466] [2021-07-13 19:56:01,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:01,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:01,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:02,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:02,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:02,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:02,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:02,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:02,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:02,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:02,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877569466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:02,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:02,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:56:02,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325740581] [2021-07-13 19:56:02,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:02,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:02,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:02,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:02,128 INFO L87 Difference]: Start difference. First operand 214 states and 438 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:02,261 INFO L93 Difference]: Finished difference Result 372 states and 766 transitions. [2021-07-13 19:56:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:56:02,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:02,263 INFO L225 Difference]: With dead ends: 372 [2021-07-13 19:56:02,263 INFO L226 Difference]: Without dead ends: 352 [2021-07-13 19:56:02,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-07-13 19:56:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 217. [2021-07-13 19:56:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.0555555555555554) internal successors, (444), 216 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 444 transitions. [2021-07-13 19:56:02,269 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 444 transitions. Word has length 26 [2021-07-13 19:56:02,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:02,269 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 444 transitions. [2021-07-13 19:56:02,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:02,269 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 444 transitions. [2021-07-13 19:56:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:02,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:02,270 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:02,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:02,485 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash -30244623, now seen corresponding path program 8 times [2021-07-13 19:56:02,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:02,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816841165] [2021-07-13 19:56:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:02,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:02,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816841165] [2021-07-13 19:56:02,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816841165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:02,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762224282] [2021-07-13 19:56:02,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:02,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:02,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:02,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:02,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:02,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:02,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:02,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:02,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:02,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:02,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:02,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:02,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:02,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762224282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:02,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:02,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-07-13 19:56:02,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932481430] [2021-07-13 19:56:02,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:56:02,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:56:02,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:56:02,913 INFO L87 Difference]: Start difference. First operand 217 states and 444 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:03,101 INFO L93 Difference]: Finished difference Result 548 states and 1112 transitions. [2021-07-13 19:56:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:56:03,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:03,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:03,103 INFO L225 Difference]: With dead ends: 548 [2021-07-13 19:56:03,103 INFO L226 Difference]: Without dead ends: 426 [2021-07-13 19:56:03,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:03,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-07-13 19:56:03,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 247. [2021-07-13 19:56:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.024390243902439) internal successors, (498), 246 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 498 transitions. [2021-07-13 19:56:03,109 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 498 transitions. Word has length 26 [2021-07-13 19:56:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:03,109 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 498 transitions. [2021-07-13 19:56:03,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 498 transitions. [2021-07-13 19:56:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:03,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:03,110 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:03,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:03,325 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1504216727, now seen corresponding path program 9 times [2021-07-13 19:56:03,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:03,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004400129] [2021-07-13 19:56:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:03,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:03,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004400129] [2021-07-13 19:56:03,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004400129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:03,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519133017] [2021-07-13 19:56:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:03,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:56:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:03,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-13 19:56:03,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:03,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:03,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:03,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:03,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:03,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:03,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 25 [2021-07-13 19:56:03,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:03,742 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-07-13 19:56:03,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:03,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:69, output treesize:10 [2021-07-13 19:56:03,752 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:03,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519133017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:03,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:03,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:56:03,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132036476] [2021-07-13 19:56:03,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:03,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:03,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:03,753 INFO L87 Difference]: Start difference. First operand 247 states and 498 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:04,053 INFO L93 Difference]: Finished difference Result 598 states and 1212 transitions. [2021-07-13 19:56:04,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:04,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:04,055 INFO L225 Difference]: With dead ends: 598 [2021-07-13 19:56:04,055 INFO L226 Difference]: Without dead ends: 496 [2021-07-13 19:56:04,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-07-13 19:56:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 235. [2021-07-13 19:56:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-07-13 19:56:04,060 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-07-13 19:56:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:04,061 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-07-13 19:56:04,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-07-13 19:56:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:04,062 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:04,062 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:04,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:56:04,269 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:04,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:04,269 INFO L82 PathProgramCache]: Analyzing trace with hash -49601197, now seen corresponding path program 10 times [2021-07-13 19:56:04,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:04,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219205059] [2021-07-13 19:56:04,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:04,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:04,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219205059] [2021-07-13 19:56:04,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219205059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:04,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070305799] [2021-07-13 19:56:04,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:04,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:04,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:04,412 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:04,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:04,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:04,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:04,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:04,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:04,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:04,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:04,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:04,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:04,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:04,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:04,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070305799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:04,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:04,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:56:04,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617758463] [2021-07-13 19:56:04,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:04,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:04,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:04,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:04,671 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:04,861 INFO L93 Difference]: Finished difference Result 470 states and 964 transitions. [2021-07-13 19:56:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:56:04,861 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:04,863 INFO L225 Difference]: With dead ends: 470 [2021-07-13 19:56:04,863 INFO L226 Difference]: Without dead ends: 450 [2021-07-13 19:56:04,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 241.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-07-13 19:56:04,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 235. [2021-07-13 19:56:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.051282051282051) internal successors, (480), 234 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 480 transitions. [2021-07-13 19:56:04,868 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 480 transitions. Word has length 26 [2021-07-13 19:56:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:04,868 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 480 transitions. [2021-07-13 19:56:04,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:04,868 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 480 transitions. [2021-07-13 19:56:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:04,868 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:04,868 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:05,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:56:05,069 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:05,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:05,069 INFO L82 PathProgramCache]: Analyzing trace with hash 802414539, now seen corresponding path program 11 times [2021-07-13 19:56:05,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:05,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288067230] [2021-07-13 19:56:05,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:05,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:05,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288067230] [2021-07-13 19:56:05,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288067230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:05,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126652679] [2021-07-13 19:56:05,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:05,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:05,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:05,256 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:05,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:05,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:05,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:05,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:05,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:05,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:05,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:05,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:05,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:05,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:05,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:05,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:05,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126652679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:05,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:05,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-07-13 19:56:05,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914608762] [2021-07-13 19:56:05,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:56:05,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:05,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:56:05,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:05,472 INFO L87 Difference]: Start difference. First operand 235 states and 480 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:05,602 INFO L93 Difference]: Finished difference Result 414 states and 855 transitions. [2021-07-13 19:56:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:56:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:05,603 INFO L225 Difference]: With dead ends: 414 [2021-07-13 19:56:05,604 INFO L226 Difference]: Without dead ends: 393 [2021-07-13 19:56:05,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-07-13 19:56:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 245. [2021-07-13 19:56:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.05327868852459) internal successors, (501), 244 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 501 transitions. [2021-07-13 19:56:05,609 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 501 transitions. Word has length 26 [2021-07-13 19:56:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:05,610 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 501 transitions. [2021-07-13 19:56:05,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:05,610 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 501 transitions. [2021-07-13 19:56:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:05,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:05,610 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:05,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:56:05,825 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash 509590407, now seen corresponding path program 12 times [2021-07-13 19:56:05,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:05,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2673981] [2021-07-13 19:56:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:05,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:05,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2673981] [2021-07-13 19:56:05,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2673981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:05,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859800859] [2021-07-13 19:56:05,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:05,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:05,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:05,980 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:05,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:06,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:06,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:06,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:06,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:06,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:06,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:06,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:06,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:06,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859800859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:06,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:06,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-07-13 19:56:06,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152968686] [2021-07-13 19:56:06,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:56:06,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:56:06,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:56:06,152 INFO L87 Difference]: Start difference. First operand 245 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:06,369 INFO L93 Difference]: Finished difference Result 610 states and 1221 transitions. [2021-07-13 19:56:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:56:06,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:06,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:06,371 INFO L225 Difference]: With dead ends: 610 [2021-07-13 19:56:06,371 INFO L226 Difference]: Without dead ends: 465 [2021-07-13 19:56:06,371 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 272.2ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:56:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-07-13 19:56:06,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 293. [2021-07-13 19:56:06,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.0136986301369864) internal successors, (588), 292 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:06,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 588 transitions. [2021-07-13 19:56:06,377 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 588 transitions. Word has length 26 [2021-07-13 19:56:06,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:06,377 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 588 transitions. [2021-07-13 19:56:06,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:06,377 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 588 transitions. [2021-07-13 19:56:06,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:06,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:06,377 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:06,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:06,593 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -964381697, now seen corresponding path program 13 times [2021-07-13 19:56:06,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:06,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375004513] [2021-07-13 19:56:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:06,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:06,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375004513] [2021-07-13 19:56:06,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375004513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:06,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442259090] [2021-07-13 19:56:06,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:06,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:06,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:06,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:06,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:06,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:06,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:06,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:06,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:06,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:06,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:06,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:06,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:06,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442259090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:06,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:06,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:56:06,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382541335] [2021-07-13 19:56:06,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:56:06,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:06,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:56:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:56:06,937 INFO L87 Difference]: Start difference. First operand 293 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:07,118 INFO L93 Difference]: Finished difference Result 634 states and 1305 transitions. [2021-07-13 19:56:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:07,119 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:07,121 INFO L225 Difference]: With dead ends: 634 [2021-07-13 19:56:07,121 INFO L226 Difference]: Without dead ends: 581 [2021-07-13 19:56:07,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2021-07-13 19:56:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 290. [2021-07-13 19:56:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-07-13 19:56:07,126 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-07-13 19:56:07,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:07,126 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-07-13 19:56:07,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,126 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-07-13 19:56:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:07,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:07,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:07,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:07,341 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash 490233833, now seen corresponding path program 14 times [2021-07-13 19:56:07,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:07,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302421022] [2021-07-13 19:56:07,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:07,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:07,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302421022] [2021-07-13 19:56:07,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302421022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:07,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693657280] [2021-07-13 19:56:07,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:07,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:07,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:07,484 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:07,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:07,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:07,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:07,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:07,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:07,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:07,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:07,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:07,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:07,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:07,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693657280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:07,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:07,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:56:07,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945605494] [2021-07-13 19:56:07,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:56:07,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:07,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:56:07,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:56:07,706 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:07,913 INFO L93 Difference]: Finished difference Result 541 states and 1096 transitions. [2021-07-13 19:56:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:07,915 INFO L225 Difference]: With dead ends: 541 [2021-07-13 19:56:07,915 INFO L226 Difference]: Without dead ends: 521 [2021-07-13 19:56:07,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 228.2ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:07,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-07-13 19:56:07,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 290. [2021-07-13 19:56:07,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.013840830449827) internal successors, (582), 289 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 582 transitions. [2021-07-13 19:56:07,920 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 582 transitions. Word has length 26 [2021-07-13 19:56:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:07,920 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 582 transitions. [2021-07-13 19:56:07,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 582 transitions. [2021-07-13 19:56:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:07,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:07,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:08,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:08,125 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1342249569, now seen corresponding path program 15 times [2021-07-13 19:56:08,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:08,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356118875] [2021-07-13 19:56:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:08,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:08,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356118875] [2021-07-13 19:56:08,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356118875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:08,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118599568] [2021-07-13 19:56:08,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:08,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:56:08,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:08,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:08,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:08,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:08,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:08,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:08,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:08,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:08,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:08,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:08,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:08,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:10 [2021-07-13 19:56:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:08,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118599568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:08,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:08,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-13 19:56:08,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899516077] [2021-07-13 19:56:08,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:56:08,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:08,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:56:08,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:56:08,454 INFO L87 Difference]: Start difference. First operand 290 states and 582 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:08,713 INFO L93 Difference]: Finished difference Result 524 states and 1067 transitions. [2021-07-13 19:56:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:08,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:08,715 INFO L225 Difference]: With dead ends: 524 [2021-07-13 19:56:08,715 INFO L226 Difference]: Without dead ends: 503 [2021-07-13 19:56:08,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:56:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-07-13 19:56:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 272. [2021-07-13 19:56:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.992619926199262) internal successors, (540), 271 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 540 transitions. [2021-07-13 19:56:08,721 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 540 transitions. Word has length 26 [2021-07-13 19:56:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:08,721 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 540 transitions. [2021-07-13 19:56:08,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 540 transitions. [2021-07-13 19:56:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-13 19:56:08,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:08,721 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:08,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:56:08,941 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash -931564597, now seen corresponding path program 16 times [2021-07-13 19:56:08,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:08,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656003279] [2021-07-13 19:56:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:09,053 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:09,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:09,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656003279] [2021-07-13 19:56:09,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656003279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:09,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870948771] [2021-07-13 19:56:09,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:09,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:09,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:09,075 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:56:09,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:09,215 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-07-13 19:56:09,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 25 [2021-07-13 19:56:09,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:09,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:09,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:09,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:10 [2021-07-13 19:56:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:09,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870948771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:09,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:09,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-13 19:56:09,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410931860] [2021-07-13 19:56:09,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:56:09,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:09,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:56:09,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:56:09,229 INFO L87 Difference]: Start difference. First operand 272 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:09,366 INFO L93 Difference]: Finished difference Result 369 states and 744 transitions. [2021-07-13 19:56:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:56:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-13 19:56:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:09,367 INFO L225 Difference]: With dead ends: 369 [2021-07-13 19:56:09,367 INFO L226 Difference]: Without dead ends: 354 [2021-07-13 19:56:09,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 190.2ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:56:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-07-13 19:56:09,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 279. [2021-07-13 19:56:09,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.9964028776978417) internal successors, (555), 278 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:09,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 555 transitions. [2021-07-13 19:56:09,373 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 555 transitions. Word has length 26 [2021-07-13 19:56:09,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:09,373 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 555 transitions. [2021-07-13 19:56:09,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:09,374 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 555 transitions. [2021-07-13 19:56:09,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-13 19:56:09,374 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:09,374 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:09,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:56:09,585 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:09,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1396364564, now seen corresponding path program 17 times [2021-07-13 19:56:09,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:09,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480321898] [2021-07-13 19:56:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:09,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:09,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480321898] [2021-07-13 19:56:09,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480321898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:09,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187087875] [2021-07-13 19:56:09,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:09,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:56:09,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:09,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:56:09,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:09,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187087875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:09,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:09,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-13 19:56:09,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336285745] [2021-07-13 19:56:09,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:56:09,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:09,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:56:09,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:56:09,684 INFO L87 Difference]: Start difference. First operand 279 states and 555 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:09,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:09,701 INFO L93 Difference]: Finished difference Result 479 states and 948 transitions. [2021-07-13 19:56:09,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:56:09,702 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-13 19:56:09,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:09,703 INFO L225 Difference]: With dead ends: 479 [2021-07-13 19:56:09,703 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:56:09,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:56:09,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:56:09,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 320. [2021-07-13 19:56:09,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.0250783699059562) internal successors, (646), 319 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 646 transitions. [2021-07-13 19:56:09,708 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 646 transitions. Word has length 28 [2021-07-13 19:56:09,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:09,708 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 646 transitions. [2021-07-13 19:56:09,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 646 transitions. [2021-07-13 19:56:09,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:09,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:09,709 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:09,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:56:09,924 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:09,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash -160566182, now seen corresponding path program 18 times [2021-07-13 19:56:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:09,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643381104] [2021-07-13 19:56:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:10,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643381104] [2021-07-13 19:56:10,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643381104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54727344] [2021-07-13 19:56:10,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:10,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:10,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:10,159 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:10,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:10,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:10,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:10,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:10,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:10,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:10,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:10,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:10,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:10,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54727344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:10,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:10,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-07-13 19:56:10,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561578345] [2021-07-13 19:56:10,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:10,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:10,470 INFO L87 Difference]: Start difference. First operand 320 states and 646 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:10,645 INFO L93 Difference]: Finished difference Result 708 states and 1436 transitions. [2021-07-13 19:56:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:56:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:10,647 INFO L225 Difference]: With dead ends: 708 [2021-07-13 19:56:10,647 INFO L226 Difference]: Without dead ends: 588 [2021-07-13 19:56:10,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 410.6ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-07-13 19:56:10,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 392. [2021-07-13 19:56:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 2.010230179028133) internal successors, (786), 391 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 786 transitions. [2021-07-13 19:56:10,653 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 786 transitions. Word has length 31 [2021-07-13 19:56:10,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:10,653 INFO L482 AbstractCegarLoop]: Abstraction has 392 states and 786 transitions. [2021-07-13 19:56:10,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 786 transitions. [2021-07-13 19:56:10,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:10,654 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:10,654 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:10,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:56:10,868 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:10,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1308942062, now seen corresponding path program 19 times [2021-07-13 19:56:10,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:10,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990072403] [2021-07-13 19:56:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:11,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990072403] [2021-07-13 19:56:11,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990072403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443231423] [2021-07-13 19:56:11,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:11,092 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:11,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:11,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:11,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:11,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:11,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:11,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:11,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:11,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:11,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443231423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:11,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:11,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:11,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180380216] [2021-07-13 19:56:11,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:11,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:11,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:11,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:11,438 INFO L87 Difference]: Start difference. First operand 392 states and 786 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:11,631 INFO L93 Difference]: Finished difference Result 810 states and 1669 transitions. [2021-07-13 19:56:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:56:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:11,633 INFO L225 Difference]: With dead ends: 810 [2021-07-13 19:56:11,633 INFO L226 Difference]: Without dead ends: 757 [2021-07-13 19:56:11,633 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:11,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-07-13 19:56:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 413. [2021-07-13 19:56:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.0072815533980584) internal successors, (827), 412 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 827 transitions. [2021-07-13 19:56:11,640 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 827 transitions. Word has length 31 [2021-07-13 19:56:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:11,640 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 827 transitions. [2021-07-13 19:56:11,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 827 transitions. [2021-07-13 19:56:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:11,641 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:11,641 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:11,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:56:11,841 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1649221820, now seen corresponding path program 20 times [2021-07-13 19:56:11,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:11,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634941705] [2021-07-13 19:56:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:12,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634941705] [2021-07-13 19:56:12,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634941705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505545573] [2021-07-13 19:56:12,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:12,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:12,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:12,058 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:12,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:12,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:12,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:12,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:12,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:12,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:12,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:12,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505545573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:12,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:12,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:12,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550126546] [2021-07-13 19:56:12,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:12,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:12,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:12,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:12,377 INFO L87 Difference]: Start difference. First operand 413 states and 827 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:12,606 INFO L93 Difference]: Finished difference Result 880 states and 1806 transitions. [2021-07-13 19:56:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:12,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:12,609 INFO L225 Difference]: With dead ends: 880 [2021-07-13 19:56:12,609 INFO L226 Difference]: Without dead ends: 824 [2021-07-13 19:56:12,609 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 403.7ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-07-13 19:56:12,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 425. [2021-07-13 19:56:12,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.009433962264151) internal successors, (852), 424 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 852 transitions. [2021-07-13 19:56:12,621 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 852 transitions. Word has length 31 [2021-07-13 19:56:12,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:12,621 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 852 transitions. [2021-07-13 19:56:12,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 852 transitions. [2021-07-13 19:56:12,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:12,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:12,621 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:12,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:12,837 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1866596212, now seen corresponding path program 21 times [2021-07-13 19:56:12,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:12,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538036978] [2021-07-13 19:56:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:13,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:13,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538036978] [2021-07-13 19:56:13,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538036978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:13,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562146331] [2021-07-13 19:56:13,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:13,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:56:13,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:13,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:13,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:13,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:13,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:13,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:13,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:13,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:13,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:13,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:13,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562146331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:13,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:13,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:13,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411016808] [2021-07-13 19:56:13,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:13,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:13,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:13,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:13,426 INFO L87 Difference]: Start difference. First operand 425 states and 852 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:13,719 INFO L93 Difference]: Finished difference Result 809 states and 1648 transitions. [2021-07-13 19:56:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:13,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:13,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:13,721 INFO L225 Difference]: With dead ends: 809 [2021-07-13 19:56:13,721 INFO L226 Difference]: Without dead ends: 769 [2021-07-13 19:56:13,721 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 416.3ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-07-13 19:56:13,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 428. [2021-07-13 19:56:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.011709601873536) internal successors, (859), 427 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 859 transitions. [2021-07-13 19:56:13,728 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 859 transitions. Word has length 31 [2021-07-13 19:56:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:13,728 INFO L482 AbstractCegarLoop]: Abstraction has 428 states and 859 transitions. [2021-07-13 19:56:13,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:13,728 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 859 transitions. [2021-07-13 19:56:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:13,729 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:13,729 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:13,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:56:13,929 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:13,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:13,930 INFO L82 PathProgramCache]: Analyzing trace with hash 865807024, now seen corresponding path program 22 times [2021-07-13 19:56:13,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:13,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997104936] [2021-07-13 19:56:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:13,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-13 19:56:14,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:14,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997104936] [2021-07-13 19:56:14,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997104936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13307612] [2021-07-13 19:56:14,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:14,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:14,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:14,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:14,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:14,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:14,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:14,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:14,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:14,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:14,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:14,373 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:14,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:14,374 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:14,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13307612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:14,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:14,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 21 [2021-07-13 19:56:14,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123019018] [2021-07-13 19:56:14,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:14,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:14,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:14,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:14,383 INFO L87 Difference]: Start difference. First operand 428 states and 859 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:14,636 INFO L93 Difference]: Finished difference Result 853 states and 1716 transitions. [2021-07-13 19:56:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:56:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:14,639 INFO L225 Difference]: With dead ends: 853 [2021-07-13 19:56:14,639 INFO L226 Difference]: Without dead ends: 708 [2021-07-13 19:56:14,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 398.4ms TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-07-13 19:56:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 464. [2021-07-13 19:56:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.9978401727861772) internal successors, (925), 463 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 925 transitions. [2021-07-13 19:56:14,645 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 925 transitions. Word has length 31 [2021-07-13 19:56:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:14,645 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 925 transitions. [2021-07-13 19:56:14,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:14,646 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 925 transitions. [2021-07-13 19:56:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:14,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:14,646 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:14,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:14,861 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:14,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:14,861 INFO L82 PathProgramCache]: Analyzing trace with hash -282568856, now seen corresponding path program 23 times [2021-07-13 19:56:14,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:14,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872231782] [2021-07-13 19:56:14,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:15,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:15,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872231782] [2021-07-13 19:56:15,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872231782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:15,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510329228] [2021-07-13 19:56:15,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:15,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:15,056 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:15,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:15,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:15,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:15,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:15,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:15,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:15,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:15,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:15,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:15,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510329228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:15,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:15,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-13 19:56:15,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416574935] [2021-07-13 19:56:15,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:15,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:15,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:15,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:15,346 INFO L87 Difference]: Start difference. First operand 464 states and 925 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:15,525 INFO L93 Difference]: Finished difference Result 925 states and 1897 transitions. [2021-07-13 19:56:15,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:15,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:15,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:15,527 INFO L225 Difference]: With dead ends: 925 [2021-07-13 19:56:15,527 INFO L226 Difference]: Without dead ends: 872 [2021-07-13 19:56:15,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-07-13 19:56:15,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 461. [2021-07-13 19:56:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.9978260869565216) internal successors, (919), 460 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:15,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 919 transitions. [2021-07-13 19:56:15,535 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 919 transitions. Word has length 31 [2021-07-13 19:56:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:15,535 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 919 transitions. [2021-07-13 19:56:15,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 919 transitions. [2021-07-13 19:56:15,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:15,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:15,536 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:15,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:56:15,749 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1619372270, now seen corresponding path program 24 times [2021-07-13 19:56:15,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:15,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499749395] [2021-07-13 19:56:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:15,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:15,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:15,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499749395] [2021-07-13 19:56:15,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499749395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:15,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617583717] [2021-07-13 19:56:15,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:15,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:15,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:15,950 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:16,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:16,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:16,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:16,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:16,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:16,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:16,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:16,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:16,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:16,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617583717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:16,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:16,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-07-13 19:56:16,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843148193] [2021-07-13 19:56:16,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:16,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:16,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:16,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:16,269 INFO L87 Difference]: Start difference. First operand 461 states and 919 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:16,498 INFO L93 Difference]: Finished difference Result 962 states and 1970 transitions. [2021-07-13 19:56:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:56:16,499 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:16,501 INFO L225 Difference]: With dead ends: 962 [2021-07-13 19:56:16,501 INFO L226 Difference]: Without dead ends: 906 [2021-07-13 19:56:16,502 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-07-13 19:56:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 458. [2021-07-13 19:56:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.9978118161925602) internal successors, (913), 457 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 913 transitions. [2021-07-13 19:56:16,509 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 913 transitions. Word has length 31 [2021-07-13 19:56:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:16,509 INFO L482 AbstractCegarLoop]: Abstraction has 458 states and 913 transitions. [2021-07-13 19:56:16,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 913 transitions. [2021-07-13 19:56:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:16,510 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:16,510 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:16,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:16,725 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:16,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:16,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1401997878, now seen corresponding path program 25 times [2021-07-13 19:56:16,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:16,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659177233] [2021-07-13 19:56:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:16,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:16,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659177233] [2021-07-13 19:56:16,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659177233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:16,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911301222] [2021-07-13 19:56:16,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:56:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:16,951 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:17,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:17,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:17,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:17,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:17,286 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:17,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:17,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:17,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:17,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911301222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:17,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:17,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:17,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11699924] [2021-07-13 19:56:17,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:17,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:17,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:17,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:17,302 INFO L87 Difference]: Start difference. First operand 458 states and 913 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:17,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:17,544 INFO L93 Difference]: Finished difference Result 936 states and 1914 transitions. [2021-07-13 19:56:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:17,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:17,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:17,547 INFO L225 Difference]: With dead ends: 936 [2021-07-13 19:56:17,547 INFO L226 Difference]: Without dead ends: 877 [2021-07-13 19:56:17,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-07-13 19:56:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 434. [2021-07-13 19:56:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0115473441108547) internal successors, (871), 433 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 871 transitions. [2021-07-13 19:56:17,553 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 871 transitions. Word has length 31 [2021-07-13 19:56:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:17,553 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 871 transitions. [2021-07-13 19:56:17,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 871 transitions. [2021-07-13 19:56:17,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:17,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:17,554 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:17,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:56:17,769 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1874857228, now seen corresponding path program 26 times [2021-07-13 19:56:17,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:17,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943726384] [2021-07-13 19:56:17,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:17,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943726384] [2021-07-13 19:56:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943726384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145339663] [2021-07-13 19:56:17,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:17,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:17,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:17,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:17,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:18,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:18,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:18,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:18,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:18,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:18,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:18,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:18,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:18,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:18,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145339663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:18,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:18,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:18,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673015423] [2021-07-13 19:56:18,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:18,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:18,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:18,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:18,336 INFO L87 Difference]: Start difference. First operand 434 states and 871 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:18,541 INFO L93 Difference]: Finished difference Result 947 states and 1941 transitions. [2021-07-13 19:56:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:18,544 INFO L225 Difference]: With dead ends: 947 [2021-07-13 19:56:18,544 INFO L226 Difference]: Without dead ends: 905 [2021-07-13 19:56:18,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-07-13 19:56:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 431. [2021-07-13 19:56:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.0186046511627906) internal successors, (868), 430 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 868 transitions. [2021-07-13 19:56:18,550 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 868 transitions. Word has length 31 [2021-07-13 19:56:18,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:18,550 INFO L482 AbstractCegarLoop]: Abstraction has 431 states and 868 transitions. [2021-07-13 19:56:18,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:18,550 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 868 transitions. [2021-07-13 19:56:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:18,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:18,551 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:18,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:18,761 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:18,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:18,762 INFO L82 PathProgramCache]: Analyzing trace with hash 615761780, now seen corresponding path program 27 times [2021-07-13 19:56:18,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:18,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24060339] [2021-07-13 19:56:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:18,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:18,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24060339] [2021-07-13 19:56:18,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24060339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:18,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821381965] [2021-07-13 19:56:18,933 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:18,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:56:18,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:18,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:18,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:19,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:19,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:19,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:19,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:19,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 32 [2021-07-13 19:56:19,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:19,352 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-07-13 19:56:19,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:19,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-07-13 19:56:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:19,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821381965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:19,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:19,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:19,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988488009] [2021-07-13 19:56:19,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:19,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:19,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:19,363 INFO L87 Difference]: Start difference. First operand 431 states and 868 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:19,668 INFO L93 Difference]: Finished difference Result 780 states and 1574 transitions. [2021-07-13 19:56:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:19,671 INFO L225 Difference]: With dead ends: 780 [2021-07-13 19:56:19,671 INFO L226 Difference]: Without dead ends: 757 [2021-07-13 19:56:19,671 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2021-07-13 19:56:19,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 470. [2021-07-13 19:56:19,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-07-13 19:56:19,677 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-07-13 19:56:19,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:19,677 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-07-13 19:56:19,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:19,677 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-07-13 19:56:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:19,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:19,678 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:19,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:56:19,893 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:19,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:19,893 INFO L82 PathProgramCache]: Analyzing trace with hash 833136172, now seen corresponding path program 28 times [2021-07-13 19:56:19,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:19,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345656099] [2021-07-13 19:56:19,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:20,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:20,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345656099] [2021-07-13 19:56:20,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345656099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:20,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202520715] [2021-07-13 19:56:20,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:20,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:20,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:20,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:20,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:20,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:20,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:20,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:20,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:20,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:20,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:20,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202520715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:20,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:20,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:20,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284090654] [2021-07-13 19:56:20,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:20,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:20,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:20,444 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:20,705 INFO L93 Difference]: Finished difference Result 833 states and 1680 transitions. [2021-07-13 19:56:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:20,705 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:20,707 INFO L225 Difference]: With dead ends: 833 [2021-07-13 19:56:20,707 INFO L226 Difference]: Without dead ends: 812 [2021-07-13 19:56:20,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:20,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-07-13 19:56:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 470. [2021-07-13 19:56:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.0042643923240937) internal successors, (940), 469 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 940 transitions. [2021-07-13 19:56:20,714 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 940 transitions. Word has length 31 [2021-07-13 19:56:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:20,714 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 940 transitions. [2021-07-13 19:56:20,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 940 transitions. [2021-07-13 19:56:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:20,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:20,715 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:20,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:20,917 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:20,917 INFO L82 PathProgramCache]: Analyzing trace with hash -167653016, now seen corresponding path program 29 times [2021-07-13 19:56:20,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:20,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727961317] [2021-07-13 19:56:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:21,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:21,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727961317] [2021-07-13 19:56:21,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727961317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:21,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249667601] [2021-07-13 19:56:21,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:21,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:21,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:21,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:21,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:21,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:21,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:21,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 32 [2021-07-13 19:56:21,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:21,476 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-07-13 19:56:21,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:21,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:12 [2021-07-13 19:56:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:21,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249667601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:21,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:21,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-13 19:56:21,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935717516] [2021-07-13 19:56:21,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:21,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:21,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:21,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:21,486 INFO L87 Difference]: Start difference. First operand 470 states and 940 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:21,872 INFO L93 Difference]: Finished difference Result 1001 states and 2003 transitions. [2021-07-13 19:56:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:56:21,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:21,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:21,875 INFO L225 Difference]: With dead ends: 1001 [2021-07-13 19:56:21,875 INFO L226 Difference]: Without dead ends: 828 [2021-07-13 19:56:21,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:21,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2021-07-13 19:56:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 512. [2021-07-13 19:56:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.9921722113502935) internal successors, (1018), 511 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1018 transitions. [2021-07-13 19:56:21,882 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1018 transitions. Word has length 31 [2021-07-13 19:56:21,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:21,882 INFO L482 AbstractCegarLoop]: Abstraction has 512 states and 1018 transitions. [2021-07-13 19:56:21,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:21,882 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1018 transitions. [2021-07-13 19:56:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:21,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:21,883 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:22,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:56:22,101 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:22,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1642134986, now seen corresponding path program 30 times [2021-07-13 19:56:22,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:22,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009931413] [2021-07-13 19:56:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:22,260 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:22,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:22,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009931413] [2021-07-13 19:56:22,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009931413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:22,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256306665] [2021-07-13 19:56:22,261 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:22,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:56:22,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:22,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:22,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:22,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:22,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:22,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:22,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:22,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:22,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:22,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:22,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256306665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:22,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:22,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-07-13 19:56:22,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095523640] [2021-07-13 19:56:22,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:22,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:22,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:22,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:22,598 INFO L87 Difference]: Start difference. First operand 512 states and 1018 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:22,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:22,804 INFO L93 Difference]: Finished difference Result 1117 states and 2272 transitions. [2021-07-13 19:56:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:56:22,804 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:22,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:22,807 INFO L225 Difference]: With dead ends: 1117 [2021-07-13 19:56:22,807 INFO L226 Difference]: Without dead ends: 1061 [2021-07-13 19:56:22,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2021-07-13 19:56:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 539. [2021-07-13 19:56:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.986988847583643) internal successors, (1069), 538 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1069 transitions. [2021-07-13 19:56:22,815 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1069 transitions. Word has length 31 [2021-07-13 19:56:22,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:22,815 INFO L482 AbstractCegarLoop]: Abstraction has 539 states and 1069 transitions. [2021-07-13 19:56:22,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:22,815 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1069 transitions. [2021-07-13 19:56:22,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:22,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:22,816 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:23,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:56:23,029 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1859509378, now seen corresponding path program 31 times [2021-07-13 19:56:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:23,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007822450] [2021-07-13 19:56:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:23,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007822450] [2021-07-13 19:56:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007822450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:23,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531479450] [2021-07-13 19:56:23,199 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:23,221 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:23,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:23,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:23,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:23,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:23,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:23,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:23,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:23,536 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:23,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531479450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:23,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:23,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:23,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023462903] [2021-07-13 19:56:23,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:23,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:23,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:23,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:23,545 INFO L87 Difference]: Start difference. First operand 539 states and 1069 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:23,777 INFO L93 Difference]: Finished difference Result 1088 states and 2213 transitions. [2021-07-13 19:56:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:23,777 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:23,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:23,780 INFO L225 Difference]: With dead ends: 1088 [2021-07-13 19:56:23,780 INFO L226 Difference]: Without dead ends: 1029 [2021-07-13 19:56:23,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 391.0ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2021-07-13 19:56:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 536. [2021-07-13 19:56:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.9869158878504674) internal successors, (1063), 535 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1063 transitions. [2021-07-13 19:56:23,787 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1063 transitions. Word has length 31 [2021-07-13 19:56:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:23,787 INFO L482 AbstractCegarLoop]: Abstraction has 536 states and 1063 transitions. [2021-07-13 19:56:23,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1063 transitions. [2021-07-13 19:56:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:23,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:23,788 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:23,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:56:23,994 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1386650028, now seen corresponding path program 32 times [2021-07-13 19:56:23,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:23,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285365499] [2021-07-13 19:56:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:24,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285365499] [2021-07-13 19:56:24,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285365499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:24,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033864405] [2021-07-13 19:56:24,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:24,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:24,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:24,186 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:24,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:24,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:24,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:24,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:24,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:24,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:24,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:24,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:24,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:24,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033864405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:24,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:24,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:24,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63390208] [2021-07-13 19:56:24,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:24,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:24,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:24,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:24,496 INFO L87 Difference]: Start difference. First operand 536 states and 1063 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:24,726 INFO L93 Difference]: Finished difference Result 1059 states and 2151 transitions. [2021-07-13 19:56:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:24,729 INFO L225 Difference]: With dead ends: 1059 [2021-07-13 19:56:24,729 INFO L226 Difference]: Without dead ends: 1017 [2021-07-13 19:56:24,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-07-13 19:56:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 533. [2021-07-13 19:56:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 532 states have (on average 1.986842105263158) internal successors, (1057), 532 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1057 transitions. [2021-07-13 19:56:24,736 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1057 transitions. Word has length 31 [2021-07-13 19:56:24,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:24,736 INFO L482 AbstractCegarLoop]: Abstraction has 533 states and 1057 transitions. [2021-07-13 19:56:24,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:24,736 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1057 transitions. [2021-07-13 19:56:24,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:24,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:24,737 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:24,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:56:24,949 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:24,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1919082992, now seen corresponding path program 33 times [2021-07-13 19:56:24,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:24,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724426016] [2021-07-13 19:56:24,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:25,138 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:25,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724426016] [2021-07-13 19:56:25,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724426016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:25,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903887051] [2021-07-13 19:56:25,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:25,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:56:25,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:25,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:25,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:25,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:25,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:25,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:25,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:25,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:25,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:25,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:25,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:25,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903887051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:25,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:25,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-07-13 19:56:25,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708787524] [2021-07-13 19:56:25,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:25,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:25,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:25,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:25,494 INFO L87 Difference]: Start difference. First operand 533 states and 1057 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:25,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:25,620 INFO L93 Difference]: Finished difference Result 1026 states and 2079 transitions. [2021-07-13 19:56:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:56:25,621 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:25,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:25,623 INFO L225 Difference]: With dead ends: 1026 [2021-07-13 19:56:25,623 INFO L226 Difference]: Without dead ends: 938 [2021-07-13 19:56:25,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-07-13 19:56:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 575. [2021-07-13 19:56:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.9825783972125435) internal successors, (1138), 574 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1138 transitions. [2021-07-13 19:56:25,630 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1138 transitions. Word has length 31 [2021-07-13 19:56:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:25,630 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1138 transitions. [2021-07-13 19:56:25,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1138 transitions. [2021-07-13 19:56:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:25,631 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:25,631 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:25,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:56:25,841 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash -566096302, now seen corresponding path program 34 times [2021-07-13 19:56:25,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:25,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124923259] [2021-07-13 19:56:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:26,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:26,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124923259] [2021-07-13 19:56:26,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124923259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:26,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267537565] [2021-07-13 19:56:26,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:26,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:26,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:26,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:26,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:26,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:26,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:26,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:26,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:26,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:26,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:26,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:26,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:26,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:26,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267537565] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:26,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:26,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-07-13 19:56:26,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567051510] [2021-07-13 19:56:26,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:26,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:26,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:26,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:26,340 INFO L87 Difference]: Start difference. First operand 575 states and 1138 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:26,541 INFO L93 Difference]: Finished difference Result 1110 states and 2251 transitions. [2021-07-13 19:56:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:26,541 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:26,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:26,543 INFO L225 Difference]: With dead ends: 1110 [2021-07-13 19:56:26,543 INFO L226 Difference]: Without dead ends: 1057 [2021-07-13 19:56:26,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 361.7ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:26,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-07-13 19:56:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 563. [2021-07-13 19:56:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 1.9822064056939501) internal successors, (1114), 562 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1114 transitions. [2021-07-13 19:56:26,551 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1114 transitions. Word has length 31 [2021-07-13 19:56:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:26,551 INFO L482 AbstractCegarLoop]: Abstraction has 563 states and 1114 transitions. [2021-07-13 19:56:26,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:26,551 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1114 transitions. [2021-07-13 19:56:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:26,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:26,552 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:26,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:56:26,768 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:26,768 INFO L82 PathProgramCache]: Analyzing trace with hash -348721910, now seen corresponding path program 35 times [2021-07-13 19:56:26,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:26,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319746822] [2021-07-13 19:56:26,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:26,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319746822] [2021-07-13 19:56:26,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319746822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:26,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676921326] [2021-07-13 19:56:26,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:26,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:26,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:26,981 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-13 19:56:26,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:27,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:27,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:27,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:27,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:27,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:27,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 26 [2021-07-13 19:56:27,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:27,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:27,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:27,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:9 [2021-07-13 19:56:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:27,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676921326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:27,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:27,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-07-13 19:56:27,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421718946] [2021-07-13 19:56:27,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:56:27,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:56:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:56:27,336 INFO L87 Difference]: Start difference. First operand 563 states and 1114 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:28,196 INFO L93 Difference]: Finished difference Result 1236 states and 2487 transitions. [2021-07-13 19:56:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:56:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:28,198 INFO L225 Difference]: With dead ends: 1236 [2021-07-13 19:56:28,198 INFO L226 Difference]: Without dead ends: 1116 [2021-07-13 19:56:28,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 911.0ms TimeCoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:56:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-13 19:56:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 578. [2021-07-13 19:56:28,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 577 states have (on average 1.977469670710572) internal successors, (1141), 577 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 1141 transitions. [2021-07-13 19:56:28,206 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 1141 transitions. Word has length 31 [2021-07-13 19:56:28,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:28,206 INFO L482 AbstractCegarLoop]: Abstraction has 578 states and 1141 transitions. [2021-07-13 19:56:28,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:28,206 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 1141 transitions. [2021-07-13 19:56:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:28,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:28,207 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:28,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 19:56:28,421 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:28,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:28,421 INFO L82 PathProgramCache]: Analyzing trace with hash -821581260, now seen corresponding path program 36 times [2021-07-13 19:56:28,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:28,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975330691] [2021-07-13 19:56:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:28,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:28,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975330691] [2021-07-13 19:56:28,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975330691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:28,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79216131] [2021-07-13 19:56:28,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:28,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:56:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:28,636 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-13 19:56:28,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:28,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:28,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:28,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:28,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:28,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:28,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:28,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79216131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:28,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:28,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:28,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796813136] [2021-07-13 19:56:28,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:28,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:28,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:28,969 INFO L87 Difference]: Start difference. First operand 578 states and 1141 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:29,186 INFO L93 Difference]: Finished difference Result 1207 states and 2430 transitions. [2021-07-13 19:56:29,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:29,186 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:29,188 INFO L225 Difference]: With dead ends: 1207 [2021-07-13 19:56:29,188 INFO L226 Difference]: Without dead ends: 1075 [2021-07-13 19:56:29,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-07-13 19:56:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 614. [2021-07-13 19:56:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.9804241435562806) internal successors, (1214), 613 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1214 transitions. [2021-07-13 19:56:29,196 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1214 transitions. Word has length 31 [2021-07-13 19:56:29,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:29,196 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 1214 transitions. [2021-07-13 19:56:29,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1214 transitions. [2021-07-13 19:56:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:29,197 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:29,197 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:29,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:29,403 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:29,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1916779244, now seen corresponding path program 37 times [2021-07-13 19:56:29,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:29,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125651585] [2021-07-13 19:56:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:29,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:29,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125651585] [2021-07-13 19:56:29,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125651585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:29,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89541114] [2021-07-13 19:56:29,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:29,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:29,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:29,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:29,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:29,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:29,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:29,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:29,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:29,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:29,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:29,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89541114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:29,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:29,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-07-13 19:56:29,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397062607] [2021-07-13 19:56:29,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 19:56:29,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:29,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 19:56:29,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:29,942 INFO L87 Difference]: Start difference. First operand 614 states and 1214 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:30,132 INFO L93 Difference]: Finished difference Result 1033 states and 2073 transitions. [2021-07-13 19:56:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:30,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:30,134 INFO L225 Difference]: With dead ends: 1033 [2021-07-13 19:56:30,134 INFO L226 Difference]: Without dead ends: 1010 [2021-07-13 19:56:30,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-07-13 19:56:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 624. [2021-07-13 19:56:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 623 states have (on average 1.9823434991974318) internal successors, (1235), 623 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 1235 transitions. [2021-07-13 19:56:30,142 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 1235 transitions. Word has length 31 [2021-07-13 19:56:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:30,142 INFO L482 AbstractCegarLoop]: Abstraction has 624 states and 1235 transitions. [2021-07-13 19:56:30,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 1235 transitions. [2021-07-13 19:56:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:30,143 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:30,143 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:30,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:30,357 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1512927684, now seen corresponding path program 38 times [2021-07-13 19:56:30,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:30,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972155840] [2021-07-13 19:56:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:30,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972155840] [2021-07-13 19:56:30,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972155840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733401672] [2021-07-13 19:56:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:30,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:30,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:30,569 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:30,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:30,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:30,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:30,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:30,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:30,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:30,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:30,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:30,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:30,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733401672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:30,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:30,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 19:56:30,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290833718] [2021-07-13 19:56:30,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:30,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:30,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:30,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:30,837 INFO L87 Difference]: Start difference. First operand 624 states and 1235 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:31,097 INFO L93 Difference]: Finished difference Result 1316 states and 2627 transitions. [2021-07-13 19:56:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:56:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:31,099 INFO L225 Difference]: With dead ends: 1316 [2021-07-13 19:56:31,100 INFO L226 Difference]: Without dead ends: 1163 [2021-07-13 19:56:31,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:31,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-07-13 19:56:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 717. [2021-07-13 19:56:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.9594972067039107) internal successors, (1403), 716 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:31,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 1403 transitions. [2021-07-13 19:56:31,108 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 1403 transitions. Word has length 31 [2021-07-13 19:56:31,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:31,108 INFO L482 AbstractCegarLoop]: Abstraction has 717 states and 1403 transitions. [2021-07-13 19:56:31,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:31,109 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 1403 transitions. [2021-07-13 19:56:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:31,109 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:31,110 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:31,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:31,315 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:31,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:31,315 INFO L82 PathProgramCache]: Analyzing trace with hash 514234710, now seen corresponding path program 39 times [2021-07-13 19:56:31,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:31,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789110996] [2021-07-13 19:56:31,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:31,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:31,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789110996] [2021-07-13 19:56:31,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789110996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:31,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555352136] [2021-07-13 19:56:31,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:31,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:56:31,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:31,549 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:31,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:31,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:31,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:31,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:31,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:31,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:31,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:31,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:31,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:31,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:31,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:31,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:31,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555352136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:31,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:31,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 19:56:31,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930127168] [2021-07-13 19:56:31,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:31,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:31,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:31,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:31,847 INFO L87 Difference]: Start difference. First operand 717 states and 1403 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:32,141 INFO L93 Difference]: Finished difference Result 1252 states and 2517 transitions. [2021-07-13 19:56:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:32,141 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:32,143 INFO L225 Difference]: With dead ends: 1252 [2021-07-13 19:56:32,143 INFO L226 Difference]: Without dead ends: 1197 [2021-07-13 19:56:32,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 397.6ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-07-13 19:56:32,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 762. [2021-07-13 19:56:32,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.9540078843626807) internal successors, (1487), 761 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1487 transitions. [2021-07-13 19:56:32,152 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1487 transitions. Word has length 31 [2021-07-13 19:56:32,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:32,152 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 1487 transitions. [2021-07-13 19:56:32,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:32,152 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1487 transitions. [2021-07-13 19:56:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:32,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:32,153 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:32,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 19:56:32,364 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash -486554478, now seen corresponding path program 40 times [2021-07-13 19:56:32,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:32,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947884212] [2021-07-13 19:56:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:32,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:32,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947884212] [2021-07-13 19:56:32,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947884212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:32,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063176483] [2021-07-13 19:56:32,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:32,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:32,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:32,558 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:32,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:32,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:32,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:32,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:32,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:32,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:32,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:32,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063176483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:32,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:32,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-07-13 19:56:32,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493737685] [2021-07-13 19:56:32,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:32,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:32,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:32,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:32,827 INFO L87 Difference]: Start difference. First operand 762 states and 1487 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:33,148 INFO L93 Difference]: Finished difference Result 1353 states and 2677 transitions. [2021-07-13 19:56:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:56:33,148 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:33,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:33,150 INFO L225 Difference]: With dead ends: 1353 [2021-07-13 19:56:33,150 INFO L226 Difference]: Without dead ends: 1168 [2021-07-13 19:56:33,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 420.4ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:56:33,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-07-13 19:56:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 678. [2021-07-13 19:56:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 677 states have (on average 1.9748892171344166) internal successors, (1337), 677 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 1337 transitions. [2021-07-13 19:56:33,159 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 1337 transitions. Word has length 31 [2021-07-13 19:56:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:33,159 INFO L482 AbstractCegarLoop]: Abstraction has 678 states and 1337 transitions. [2021-07-13 19:56:33,159 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) [2021-07-13 19:56:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 1337 transitions. [2021-07-13 19:56:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:33,160 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:33,160 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:33,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:33,360 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:33,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1540607916, now seen corresponding path program 41 times [2021-07-13 19:56:33,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:33,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925017379] [2021-07-13 19:56:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:33,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925017379] [2021-07-13 19:56:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925017379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520776335] [2021-07-13 19:56:33,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:33,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:56:33,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:33,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:33,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:33,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:33,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:33,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:33,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:33,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:33,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:33,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520776335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:33,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:33,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 19:56:33,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722184999] [2021-07-13 19:56:33,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:33,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:33,877 INFO L87 Difference]: Start difference. First operand 678 states and 1337 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:34,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:34,077 INFO L93 Difference]: Finished difference Result 1283 states and 2599 transitions. [2021-07-13 19:56:34,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:56:34,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:34,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:34,079 INFO L225 Difference]: With dead ends: 1283 [2021-07-13 19:56:34,079 INFO L226 Difference]: Without dead ends: 1224 [2021-07-13 19:56:34,079 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:34,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-07-13 19:56:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 681. [2021-07-13 19:56:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.975) internal successors, (1343), 680 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:34,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1343 transitions. [2021-07-13 19:56:34,087 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1343 transitions. Word has length 31 [2021-07-13 19:56:34,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:34,087 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1343 transitions. [2021-07-13 19:56:34,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1343 transitions. [2021-07-13 19:56:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:34,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:34,088 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:34,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:34,293 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1067748566, now seen corresponding path program 42 times [2021-07-13 19:56:34,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:34,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123941283] [2021-07-13 19:56:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:34,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123941283] [2021-07-13 19:56:34,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123941283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843534726] [2021-07-13 19:56:34,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:34,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:56:34,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:34,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:34,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:34,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:34,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:34,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:34,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:34,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:34,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:34,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:34,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:34,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843534726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:34,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:34,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 19:56:34,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276097079] [2021-07-13 19:56:34,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:34,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:34,788 INFO L87 Difference]: Start difference. First operand 681 states and 1343 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:35,024 INFO L93 Difference]: Finished difference Result 1174 states and 2374 transitions. [2021-07-13 19:56:35,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:56:35,024 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:35,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:35,026 INFO L225 Difference]: With dead ends: 1174 [2021-07-13 19:56:35,026 INFO L226 Difference]: Without dead ends: 1132 [2021-07-13 19:56:35,026 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 365.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:56:35,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2021-07-13 19:56:35,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 684. [2021-07-13 19:56:35,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 1.9751098096632504) internal successors, (1349), 683 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1349 transitions. [2021-07-13 19:56:35,034 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1349 transitions. Word has length 31 [2021-07-13 19:56:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:35,034 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1349 transitions. [2021-07-13 19:56:35,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1349 transitions. [2021-07-13 19:56:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:35,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:35,035 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:35,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:56:35,235 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1600181530, now seen corresponding path program 43 times [2021-07-13 19:56:35,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:35,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117651672] [2021-07-13 19:56:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:35,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:35,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117651672] [2021-07-13 19:56:35,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117651672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:35,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118906894] [2021-07-13 19:56:35,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:35,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:35,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:35,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:35,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:35,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:35,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:35,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:35,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:35,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:35,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118906894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:35,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:35,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-07-13 19:56:35,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202100611] [2021-07-13 19:56:35,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:35,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:35,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:35,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:35,707 INFO L87 Difference]: Start difference. First operand 684 states and 1349 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:35,959 INFO L93 Difference]: Finished difference Result 1381 states and 2772 transitions. [2021-07-13 19:56:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:56:35,959 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:35,961 INFO L225 Difference]: With dead ends: 1381 [2021-07-13 19:56:35,961 INFO L226 Difference]: Without dead ends: 1277 [2021-07-13 19:56:35,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-07-13 19:56:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 759. [2021-07-13 19:56:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 1.9736147757255937) internal successors, (1496), 758 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1496 transitions. [2021-07-13 19:56:35,971 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1496 transitions. Word has length 31 [2021-07-13 19:56:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:35,971 INFO L482 AbstractCegarLoop]: Abstraction has 759 states and 1496 transitions. [2021-07-13 19:56:35,971 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) [2021-07-13 19:56:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1496 transitions. [2021-07-13 19:56:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:35,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:35,972 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:36,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:56:36,193 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:36,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash -667623372, now seen corresponding path program 44 times [2021-07-13 19:56:36,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:36,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028812603] [2021-07-13 19:56:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:36,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:36,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028812603] [2021-07-13 19:56:36,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028812603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:36,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818557679] [2021-07-13 19:56:36,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:36,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:36,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:36,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:36,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:36,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:36,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:36,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:36,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:36,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:36,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:36,680 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:36,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818557679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:36,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:36,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 19:56:36,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455587183] [2021-07-13 19:56:36,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:36,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:36,681 INFO L87 Difference]: Start difference. First operand 759 states and 1496 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:36,900 INFO L93 Difference]: Finished difference Result 1359 states and 2747 transitions. [2021-07-13 19:56:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:36,902 INFO L225 Difference]: With dead ends: 1359 [2021-07-13 19:56:36,902 INFO L226 Difference]: Without dead ends: 1304 [2021-07-13 19:56:36,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 358.9ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-07-13 19:56:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 774. [2021-07-13 19:56:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-07-13 19:56:36,911 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-07-13 19:56:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:36,912 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-07-13 19:56:36,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:36,912 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-07-13 19:56:36,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:36,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:36,913 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:37,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:56:37,121 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1140482722, now seen corresponding path program 45 times [2021-07-13 19:56:37,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:37,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259402180] [2021-07-13 19:56:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:37,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:37,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259402180] [2021-07-13 19:56:37,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259402180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:37,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527459547] [2021-07-13 19:56:37,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:37,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:56:37,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:37,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:37,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:37,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:37,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:37,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:37,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:37,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:37,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:37,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:37,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:37,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:37,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:37,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:37,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:37,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:37,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527459547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:37,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:37,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 19:56:37,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283479755] [2021-07-13 19:56:37,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:37,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:37,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:37,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:37,636 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:37,860 INFO L93 Difference]: Finished difference Result 1116 states and 2233 transitions. [2021-07-13 19:56:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:37,861 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:37,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:37,862 INFO L225 Difference]: With dead ends: 1116 [2021-07-13 19:56:37,862 INFO L226 Difference]: Without dead ends: 1094 [2021-07-13 19:56:37,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-07-13 19:56:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 774. [2021-07-13 19:56:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-07-13 19:56:37,871 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-07-13 19:56:37,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:37,871 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-07-13 19:56:37,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:37,872 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-07-13 19:56:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:37,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:37,873 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:38,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:38,089 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1597877782, now seen corresponding path program 46 times [2021-07-13 19:56:38,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:38,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488051781] [2021-07-13 19:56:38,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:38,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:38,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488051781] [2021-07-13 19:56:38,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488051781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:38,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285166021] [2021-07-13 19:56:38,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:38,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:38,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:38,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:38,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:38,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:38,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:38,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:38,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:38,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:38,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:38,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:38,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:38,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:38,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:38,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:38,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:38,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:38,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:38,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285166021] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:38,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:38,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 19:56:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278089812] [2021-07-13 19:56:38,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:38,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:38,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:38,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:38,579 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:38,920 INFO L93 Difference]: Finished difference Result 1127 states and 2256 transitions. [2021-07-13 19:56:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:38,922 INFO L225 Difference]: With dead ends: 1127 [2021-07-13 19:56:38,922 INFO L226 Difference]: Without dead ends: 1104 [2021-07-13 19:56:38,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 353.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-07-13 19:56:38,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 774. [2021-07-13 19:56:38,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 1.9741267787839587) internal successors, (1526), 773 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1526 transitions. [2021-07-13 19:56:38,930 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1526 transitions. Word has length 31 [2021-07-13 19:56:38,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:38,930 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 1526 transitions. [2021-07-13 19:56:38,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1526 transitions. [2021-07-13 19:56:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:38,931 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:38,931 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:39,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:39,135 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:39,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:39,135 INFO L82 PathProgramCache]: Analyzing trace with hash 102354416, now seen corresponding path program 47 times [2021-07-13 19:56:39,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:39,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607670184] [2021-07-13 19:56:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:39,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:39,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607670184] [2021-07-13 19:56:39,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607670184] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:39,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882413874] [2021-07-13 19:56:39,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:39,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:56:39,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:39,349 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:39,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:39,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:39,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:39,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:39,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:39,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:39,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:39,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:39,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:39,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:39,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:39,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882413874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:39,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:39,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-07-13 19:56:39,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431919968] [2021-07-13 19:56:39,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:39,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:39,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:39,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:39,622 INFO L87 Difference]: Start difference. First operand 774 states and 1526 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:39,847 INFO L93 Difference]: Finished difference Result 1217 states and 2444 transitions. [2021-07-13 19:56:39,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:39,849 INFO L225 Difference]: With dead ends: 1217 [2021-07-13 19:56:39,849 INFO L226 Difference]: Without dead ends: 1113 [2021-07-13 19:56:39,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 354.4ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:39,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-07-13 19:56:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 801. [2021-07-13 19:56:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 1.98125) internal successors, (1585), 800 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1585 transitions. [2021-07-13 19:56:39,876 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1585 transitions. Word has length 31 [2021-07-13 19:56:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:39,876 INFO L482 AbstractCegarLoop]: Abstraction has 801 states and 1585 transitions. [2021-07-13 19:56:39,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1585 transitions. [2021-07-13 19:56:39,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:39,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:39,877 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:40,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 19:56:40,092 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:40,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1046021464, now seen corresponding path program 48 times [2021-07-13 19:56:40,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:40,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605287345] [2021-07-13 19:56:40,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:40,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605287345] [2021-07-13 19:56:40,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605287345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936035305] [2021-07-13 19:56:40,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:40,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:56:40,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:40,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:40,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:40,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:40,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:40,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:40,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:40,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:40,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:40,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:40,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936035305] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:40,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:40,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 21 [2021-07-13 19:56:40,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132562022] [2021-07-13 19:56:40,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:40,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:40,566 INFO L87 Difference]: Start difference. First operand 801 states and 1585 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:40,818 INFO L93 Difference]: Finished difference Result 1401 states and 2833 transitions. [2021-07-13 19:56:40,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:40,818 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:40,820 INFO L225 Difference]: With dead ends: 1401 [2021-07-13 19:56:40,820 INFO L226 Difference]: Without dead ends: 1344 [2021-07-13 19:56:40,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2021-07-13 19:56:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 795. [2021-07-13 19:56:40,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.978589420654912) internal successors, (1571), 794 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:40,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1571 transitions. [2021-07-13 19:56:40,829 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1571 transitions. Word has length 31 [2021-07-13 19:56:40,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:40,829 INFO L482 AbstractCegarLoop]: Abstraction has 795 states and 1571 transitions. [2021-07-13 19:56:40,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:40,829 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1571 transitions. [2021-07-13 19:56:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:40,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:40,830 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:41,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:41,046 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash 2129516810, now seen corresponding path program 49 times [2021-07-13 19:56:41,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:41,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748452868] [2021-07-13 19:56:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:41,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:41,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748452868] [2021-07-13 19:56:41,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748452868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:41,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005195681] [2021-07-13 19:56:41,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:56:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:41,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:41,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:41,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:41,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:41,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:41,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:41,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:41,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:41,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005195681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:41,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:41,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-13 19:56:41,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118293432] [2021-07-13 19:56:41,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:41,539 INFO L87 Difference]: Start difference. First operand 795 states and 1571 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:41,757 INFO L93 Difference]: Finished difference Result 1359 states and 2744 transitions. [2021-07-13 19:56:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:41,757 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:41,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:41,759 INFO L225 Difference]: With dead ends: 1359 [2021-07-13 19:56:41,759 INFO L226 Difference]: Without dead ends: 1304 [2021-07-13 19:56:41,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 365.9ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2021-07-13 19:56:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 783. [2021-07-13 19:56:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-07-13 19:56:41,767 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-07-13 19:56:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:41,767 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-07-13 19:56:41,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-07-13 19:56:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:41,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:41,768 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:41,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:56:41,969 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1656657460, now seen corresponding path program 50 times [2021-07-13 19:56:41,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:41,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267799285] [2021-07-13 19:56:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:42,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:42,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267799285] [2021-07-13 19:56:42,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267799285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:42,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456607535] [2021-07-13 19:56:42,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:42,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:42,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:42,193 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:42,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:42,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:42,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:42,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:42,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:42,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:42,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:42,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:42,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456607535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:42,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:42,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-13 19:56:42,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933279038] [2021-07-13 19:56:42,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:42,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:42,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:42,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:42,479 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:42,705 INFO L93 Difference]: Finished difference Result 1153 states and 2311 transitions. [2021-07-13 19:56:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:42,705 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:42,706 INFO L225 Difference]: With dead ends: 1153 [2021-07-13 19:56:42,706 INFO L226 Difference]: Without dead ends: 1131 [2021-07-13 19:56:42,707 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-07-13 19:56:42,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 783. [2021-07-13 19:56:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 1.9782608695652173) internal successors, (1547), 782 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1547 transitions. [2021-07-13 19:56:42,714 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1547 transitions. Word has length 31 [2021-07-13 19:56:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:42,714 INFO L482 AbstractCegarLoop]: Abstraction has 783 states and 1547 transitions. [2021-07-13 19:56:42,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1547 transitions. [2021-07-13 19:56:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:42,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:42,715 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:42,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 19:56:42,931 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:42,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:42,931 INFO L82 PathProgramCache]: Analyzing trace with hash 100050668, now seen corresponding path program 51 times [2021-07-13 19:56:42,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:42,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118158673] [2021-07-13 19:56:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:43,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:43,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118158673] [2021-07-13 19:56:43,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118158673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:43,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480928783] [2021-07-13 19:56:43,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:43,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:56:43,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:43,148 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:43,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:43,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:43,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:43,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:43,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:43,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:43,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:43,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:43,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:43,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:43,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:43,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:43,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:43,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480928783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:43,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:43,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-13 19:56:43,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792075966] [2021-07-13 19:56:43,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:43,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:43,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:43,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:43,443 INFO L87 Difference]: Start difference. First operand 783 states and 1547 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:43,674 INFO L93 Difference]: Finished difference Result 1136 states and 2278 transitions. [2021-07-13 19:56:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:56:43,674 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:43,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:43,676 INFO L225 Difference]: With dead ends: 1136 [2021-07-13 19:56:43,676 INFO L226 Difference]: Without dead ends: 1113 [2021-07-13 19:56:43,676 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 370.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-07-13 19:56:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 777. [2021-07-13 19:56:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.9755154639175259) internal successors, (1533), 776 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1533 transitions. [2021-07-13 19:56:43,684 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1533 transitions. Word has length 31 [2021-07-13 19:56:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:43,684 INFO L482 AbstractCegarLoop]: Abstraction has 777 states and 1533 transitions. [2021-07-13 19:56:43,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1533 transitions. [2021-07-13 19:56:43,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-07-13 19:56:43,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:43,685 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:43,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:56:43,885 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:43,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:43,885 INFO L82 PathProgramCache]: Analyzing trace with hash 948748694, now seen corresponding path program 52 times [2021-07-13 19:56:43,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:43,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541822621] [2021-07-13 19:56:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:44,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541822621] [2021-07-13 19:56:44,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541822621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217961801] [2021-07-13 19:56:44,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:56:44,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:44,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:44,094 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:44,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:44,301 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-07-13 19:56:44,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:44,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:44,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:44,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:44,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:12 [2021-07-13 19:56:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217961801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:44,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-13 19:56:44,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101311357] [2021-07-13 19:56:44,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 19:56:44,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:44,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 19:56:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:44,325 INFO L87 Difference]: Start difference. First operand 777 states and 1533 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:44,531 INFO L93 Difference]: Finished difference Result 1012 states and 2014 transitions. [2021-07-13 19:56:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:56:44,531 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-07-13 19:56:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:44,533 INFO L225 Difference]: With dead ends: 1012 [2021-07-13 19:56:44,533 INFO L226 Difference]: Without dead ends: 997 [2021-07-13 19:56:44,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:56:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-07-13 19:56:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 784. [2021-07-13 19:56:44,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.9770114942528736) internal successors, (1548), 783 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1548 transitions. [2021-07-13 19:56:44,540 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1548 transitions. Word has length 31 [2021-07-13 19:56:44,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:44,540 INFO L482 AbstractCegarLoop]: Abstraction has 784 states and 1548 transitions. [2021-07-13 19:56:44,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,540 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1548 transitions. [2021-07-13 19:56:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:56:44,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:44,541 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:44,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:56:44,757 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:44,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1698443767, now seen corresponding path program 53 times [2021-07-13 19:56:44,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:44,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005940290] [2021-07-13 19:56:44,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:44,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005940290] [2021-07-13 19:56:44,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005940290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811475739] [2021-07-13 19:56:44,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:44,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:56:44,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:44,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:56:44,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:44,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811475739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:44,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:44,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-13 19:56:44,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736984045] [2021-07-13 19:56:44,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:56:44,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:44,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:56:44,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:56:44,852 INFO L87 Difference]: Start difference. First operand 784 states and 1548 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:44,874 INFO L93 Difference]: Finished difference Result 1073 states and 2126 transitions. [2021-07-13 19:56:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:56:44,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:56:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:44,876 INFO L225 Difference]: With dead ends: 1073 [2021-07-13 19:56:44,876 INFO L226 Difference]: Without dead ends: 1064 [2021-07-13 19:56:44,876 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:56:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-07-13 19:56:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 845. [2021-07-13 19:56:44,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 1.9940758293838863) internal successors, (1683), 844 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1683 transitions. [2021-07-13 19:56:44,883 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1683 transitions. Word has length 33 [2021-07-13 19:56:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:44,884 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 1683 transitions. [2021-07-13 19:56:44,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1683 transitions. [2021-07-13 19:56:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 19:56:44,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:44,885 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:45,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:45,085 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:45,086 INFO L82 PathProgramCache]: Analyzing trace with hash 602846472, now seen corresponding path program 54 times [2021-07-13 19:56:45,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:45,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219447113] [2021-07-13 19:56:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:56:45,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:45,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219447113] [2021-07-13 19:56:45,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219447113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:45,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702243296] [2021-07-13 19:56:45,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:45,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:56:45,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:45,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:45,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:45,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:45,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:45,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:45,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:45,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:45,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:45,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:45,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:45,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:45,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:45,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:45,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:45,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:45,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:45,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:45,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702243296] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:45,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:45,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-07-13 19:56:45,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579071135] [2021-07-13 19:56:45,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:45,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:45,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:45,614 INFO L87 Difference]: Start difference. First operand 845 states and 1683 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:45,960 INFO L93 Difference]: Finished difference Result 1429 states and 2876 transitions. [2021-07-13 19:56:45,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:56:45,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 19:56:45,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:45,962 INFO L225 Difference]: With dead ends: 1429 [2021-07-13 19:56:45,962 INFO L226 Difference]: Without dead ends: 1414 [2021-07-13 19:56:45,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2021-07-13 19:56:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 869. [2021-07-13 19:56:45,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 1.9907834101382489) internal successors, (1728), 868 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1728 transitions. [2021-07-13 19:56:45,971 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1728 transitions. Word has length 34 [2021-07-13 19:56:45,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:45,971 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 1728 transitions. [2021-07-13 19:56:45,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:45,971 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1728 transitions. [2021-07-13 19:56:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 19:56:45,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:45,973 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:46,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:56:46,177 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 867153280, now seen corresponding path program 55 times [2021-07-13 19:56:46,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:46,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012721195] [2021-07-13 19:56:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:46,363 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:46,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:46,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012721195] [2021-07-13 19:56:46,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012721195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:46,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420210299] [2021-07-13 19:56:46,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:46,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:46,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:46,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:46,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:46,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:46,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:46,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:46,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:46,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:46,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:46,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:46,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420210299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:46,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:46,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-07-13 19:56:46,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078411271] [2021-07-13 19:56:46,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 19:56:46,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:46,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 19:56:46,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:56:46,673 INFO L87 Difference]: Start difference. First operand 869 states and 1728 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:47,037 INFO L93 Difference]: Finished difference Result 1640 states and 3316 transitions. [2021-07-13 19:56:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:56:47,037 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 19:56:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:47,039 INFO L225 Difference]: With dead ends: 1640 [2021-07-13 19:56:47,039 INFO L226 Difference]: Without dead ends: 1595 [2021-07-13 19:56:47,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:47,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-07-13 19:56:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 926. [2021-07-13 19:56:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9848648648648648) internal successors, (1836), 925 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1836 transitions. [2021-07-13 19:56:47,049 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1836 transitions. Word has length 34 [2021-07-13 19:56:47,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:47,049 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1836 transitions. [2021-07-13 19:56:47,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:47,049 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1836 transitions. [2021-07-13 19:56:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-13 19:56:47,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:47,050 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:47,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:47,257 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:47,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1679153002, now seen corresponding path program 56 times [2021-07-13 19:56:47,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:47,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472063908] [2021-07-13 19:56:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:47,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:47,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:47,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472063908] [2021-07-13 19:56:47,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472063908] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:47,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183658966] [2021-07-13 19:56:47,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:47,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:47,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:47,454 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-13 19:56:47,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:47,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:47,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:47,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:47,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 32 [2021-07-13 19:56:47,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:47,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:47,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:47,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:78, output treesize:12 [2021-07-13 19:56:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:56:47,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183658966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:47,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:47,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-07-13 19:56:47,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288638381] [2021-07-13 19:56:47,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 19:56:47,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:47,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 19:56:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:56:47,744 INFO L87 Difference]: Start difference. First operand 926 states and 1836 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:48,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:48,086 INFO L93 Difference]: Finished difference Result 1557 states and 3145 transitions. [2021-07-13 19:56:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:56:48,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-13 19:56:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:48,088 INFO L225 Difference]: With dead ends: 1557 [2021-07-13 19:56:48,088 INFO L226 Difference]: Without dead ends: 1512 [2021-07-13 19:56:48,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:56:48,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2021-07-13 19:56:48,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 896. [2021-07-13 19:56:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 1.987709497206704) internal successors, (1779), 895 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1779 transitions. [2021-07-13 19:56:48,098 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1779 transitions. Word has length 34 [2021-07-13 19:56:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:48,098 INFO L482 AbstractCegarLoop]: Abstraction has 896 states and 1779 transitions. [2021-07-13 19:56:48,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1779 transitions. [2021-07-13 19:56:48,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:48,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:48,099 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:48,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 19:56:48,299 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:48,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:48,300 INFO L82 PathProgramCache]: Analyzing trace with hash 431279499, now seen corresponding path program 57 times [2021-07-13 19:56:48,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:48,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753076356] [2021-07-13 19:56:48,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:48,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:48,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753076356] [2021-07-13 19:56:48,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753076356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:48,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900975806] [2021-07-13 19:56:48,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:48,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:56:48,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:48,538 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:56:48,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:48,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:48,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:48,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:48,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:48,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:56:48,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:48,976 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:48,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:48,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:56:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:49,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900975806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:49,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:49,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-13 19:56:49,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611409201] [2021-07-13 19:56:49,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:56:49,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:56:49,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:56:49,005 INFO L87 Difference]: Start difference. First operand 896 states and 1779 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:49,391 INFO L93 Difference]: Finished difference Result 1846 states and 3731 transitions. [2021-07-13 19:56:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:56:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:56:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:49,393 INFO L225 Difference]: With dead ends: 1846 [2021-07-13 19:56:49,393 INFO L226 Difference]: Without dead ends: 1801 [2021-07-13 19:56:49,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 604.8ms TimeCoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:56:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-07-13 19:56:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 926. [2021-07-13 19:56:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 1.9891891891891893) internal successors, (1840), 925 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1840 transitions. [2021-07-13 19:56:49,404 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1840 transitions. Word has length 36 [2021-07-13 19:56:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:49,404 INFO L482 AbstractCegarLoop]: Abstraction has 926 states and 1840 transitions. [2021-07-13 19:56:49,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1840 transitions. [2021-07-13 19:56:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:49,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:49,405 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:49,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:49,605 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:49,606 INFO L82 PathProgramCache]: Analyzing trace with hash 971114529, now seen corresponding path program 58 times [2021-07-13 19:56:49,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:49,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121971447] [2021-07-13 19:56:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:49,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:49,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121971447] [2021-07-13 19:56:49,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121971447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:49,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84247588] [2021-07-13 19:56:49,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:49,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:49,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:49,884 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:56:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:50,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:50,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:50,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:50,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:56:50,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:50,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:50,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:50,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:56:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:50,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84247588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:50,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:50,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-13 19:56:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825103164] [2021-07-13 19:56:50,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:56:50,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:50,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:56:50,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:56:50,359 INFO L87 Difference]: Start difference. First operand 926 states and 1840 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:50,888 INFO L93 Difference]: Finished difference Result 2095 states and 4241 transitions. [2021-07-13 19:56:50,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:56:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:56:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:50,891 INFO L225 Difference]: With dead ends: 2095 [2021-07-13 19:56:50,891 INFO L226 Difference]: Without dead ends: 2049 [2021-07-13 19:56:50,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 669.5ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:56:50,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-07-13 19:56:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1030. [2021-07-13 19:56:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.0136054421768708) internal successors, (2072), 1029 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2072 transitions. [2021-07-13 19:56:50,903 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2072 transitions. Word has length 36 [2021-07-13 19:56:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:50,903 INFO L482 AbstractCegarLoop]: Abstraction has 1030 states and 2072 transitions. [2021-07-13 19:56:50,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2072 transitions. [2021-07-13 19:56:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:50,904 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:50,904 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:51,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 19:56:51,105 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:51,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1302699637, now seen corresponding path program 59 times [2021-07-13 19:56:51,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:51,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542693479] [2021-07-13 19:56:51,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:56:51,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:51,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542693479] [2021-07-13 19:56:51,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542693479] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217117361] [2021-07-13 19:56:51,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:56:51,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:56:51,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:51,369 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:56:51,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:51,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:51,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:51,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:51,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:56:51,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:51,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:51,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:51,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:56:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:51,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217117361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:51,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:51,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-13 19:56:51,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229343070] [2021-07-13 19:56:51,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:56:51,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:51,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:56:51,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:56:51,861 INFO L87 Difference]: Start difference. First operand 1030 states and 2072 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:52,307 INFO L93 Difference]: Finished difference Result 1598 states and 3240 transitions. [2021-07-13 19:56:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:56:52,307 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:56:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:52,309 INFO L225 Difference]: With dead ends: 1598 [2021-07-13 19:56:52,309 INFO L226 Difference]: Without dead ends: 1576 [2021-07-13 19:56:52,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 645.9ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:56:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2021-07-13 19:56:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1036. [2021-07-13 19:56:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 2.0144927536231885) internal successors, (2085), 1035 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2085 transitions. [2021-07-13 19:56:52,322 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2085 transitions. Word has length 36 [2021-07-13 19:56:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:52,322 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2085 transitions. [2021-07-13 19:56:52,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2085 transitions. [2021-07-13 19:56:52,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:52,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:52,323 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:52,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:52,529 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:52,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:52,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1027051523, now seen corresponding path program 60 times [2021-07-13 19:56:52,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:52,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633149068] [2021-07-13 19:56:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:52,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:52,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:52,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633149068] [2021-07-13 19:56:52,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633149068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:52,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787522322] [2021-07-13 19:56:52,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:52,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:56:52,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:52,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:56:52,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:53,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:53,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:53,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:53,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:53,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:56:53,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:53,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:53,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:53,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:56:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:53,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787522322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:53,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:53,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 19:56:53,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430129897] [2021-07-13 19:56:53,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:56:53,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:53,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:56:53,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:56:53,252 INFO L87 Difference]: Start difference. First operand 1036 states and 2085 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:53,752 INFO L93 Difference]: Finished difference Result 2409 states and 4930 transitions. [2021-07-13 19:56:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:56:53,752 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:56:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:53,754 INFO L225 Difference]: With dead ends: 2409 [2021-07-13 19:56:53,754 INFO L226 Difference]: Without dead ends: 2332 [2021-07-13 19:56:53,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 658.9ms TimeCoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:56:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2021-07-13 19:56:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1084. [2021-07-13 19:56:53,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.0083102493074794) internal successors, (2175), 1083 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2175 transitions. [2021-07-13 19:56:53,767 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2175 transitions. Word has length 36 [2021-07-13 19:56:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:53,767 INFO L482 AbstractCegarLoop]: Abstraction has 1084 states and 2175 transitions. [2021-07-13 19:56:53,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:53,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2175 transitions. [2021-07-13 19:56:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:53,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:53,768 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:53,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:56:53,969 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:53,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1566886553, now seen corresponding path program 61 times [2021-07-13 19:56:53,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:53,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481148487] [2021-07-13 19:56:53,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:54,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:54,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481148487] [2021-07-13 19:56:54,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481148487] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:54,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961678737] [2021-07-13 19:56:54,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:54,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:56:54,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:54,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:54,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:54,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:54,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:54,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:54,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:56:54,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:54,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:54,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:54,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:56:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:54,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961678737] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:54,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:54,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 19:56:54,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111254491] [2021-07-13 19:56:54,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:56:54,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:54,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:56:54,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:56:54,736 INFO L87 Difference]: Start difference. First operand 1084 states and 2175 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:55,184 INFO L93 Difference]: Finished difference Result 2544 states and 5180 transitions. [2021-07-13 19:56:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:56:55,184 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:56:55,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:55,187 INFO L225 Difference]: With dead ends: 2544 [2021-07-13 19:56:55,187 INFO L226 Difference]: Without dead ends: 2466 [2021-07-13 19:56:55,187 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:56:55,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-07-13 19:56:55,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 1207. [2021-07-13 19:56:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-07-13 19:56:55,203 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-07-13 19:56:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:55,203 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-07-13 19:56:55,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-07-13 19:56:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:55,204 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:55,204 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:55,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:55,405 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:55,410 INFO L82 PathProgramCache]: Analyzing trace with hash -706927613, now seen corresponding path program 62 times [2021-07-13 19:56:55,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:55,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804733998] [2021-07-13 19:56:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:55,640 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:55,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:55,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804733998] [2021-07-13 19:56:55,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804733998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:55,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594466360] [2021-07-13 19:56:55,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:55,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:56:55,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:55,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:56:55,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:56,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:56,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:56,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:56,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:56,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:56:56,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:56,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:56,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:56,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:56:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:56,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594466360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:56,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:56,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 19:56:56,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161843358] [2021-07-13 19:56:56,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:56:56,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:56,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:56:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:56:56,181 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:56,570 INFO L93 Difference]: Finished difference Result 2101 states and 4239 transitions. [2021-07-13 19:56:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:56:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:56:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:56,572 INFO L225 Difference]: With dead ends: 2101 [2021-07-13 19:56:56,572 INFO L226 Difference]: Without dead ends: 2073 [2021-07-13 19:56:56,573 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 660.7ms TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:56:56,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2021-07-13 19:56:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 1207. [2021-07-13 19:56:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.9975124378109452) internal successors, (2409), 1206 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2409 transitions. [2021-07-13 19:56:56,586 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2409 transitions. Word has length 36 [2021-07-13 19:56:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:56,586 INFO L482 AbstractCegarLoop]: Abstraction has 1207 states and 2409 transitions. [2021-07-13 19:56:56,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2409 transitions. [2021-07-13 19:56:56,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:56,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:56,588 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:56,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 19:56:56,801 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:56,801 INFO L82 PathProgramCache]: Analyzing trace with hash 623181831, now seen corresponding path program 63 times [2021-07-13 19:56:56,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:56,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108451842] [2021-07-13 19:56:56,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:57,012 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:56:57,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:57,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108451842] [2021-07-13 19:56:57,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108451842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:57,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161445242] [2021-07-13 19:56:57,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:57,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:56:57,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:57,040 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:56:57,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:57,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:57,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:57,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:57,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:56:57,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:57,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:57,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:57,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:56:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:57,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161445242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:57,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:57,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 28 [2021-07-13 19:56:57,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452337669] [2021-07-13 19:56:57,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:56:57,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:57,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:56:57,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:56:57,480 INFO L87 Difference]: Start difference. First operand 1207 states and 2409 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:57,908 INFO L93 Difference]: Finished difference Result 2018 states and 4044 transitions. [2021-07-13 19:56:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:56:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:56:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:57,910 INFO L225 Difference]: With dead ends: 2018 [2021-07-13 19:56:57,910 INFO L226 Difference]: Without dead ends: 1879 [2021-07-13 19:56:57,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:56:57,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-07-13 19:56:57,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1350. [2021-07-13 19:56:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 1.9940696812453669) internal successors, (2690), 1349 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2690 transitions. [2021-07-13 19:56:57,924 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2690 transitions. Word has length 36 [2021-07-13 19:56:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:57,924 INFO L482 AbstractCegarLoop]: Abstraction has 1350 states and 2690 transitions. [2021-07-13 19:56:57,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2690 transitions. [2021-07-13 19:56:57,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:57,925 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:57,925 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:58,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:56:58,126 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash 603825257, now seen corresponding path program 64 times [2021-07-13 19:56:58,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:58,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618977898] [2021-07-13 19:56:58,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:58,350 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:58,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:58,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618977898] [2021-07-13 19:56:58,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618977898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:58,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717218276] [2021-07-13 19:56:58,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:58,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:56:58,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:58,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:56:58,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:56:58,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:58,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:56:58,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:56:58,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:56:58,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:56:58,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:56:58,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:56:58,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:56:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:58,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717218276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:58,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:56:58,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-13 19:56:58,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003840083] [2021-07-13 19:56:58,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:56:58,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:56:58,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:56:58,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:56:58,852 INFO L87 Difference]: Start difference. First operand 1350 states and 2690 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:56:59,199 INFO L93 Difference]: Finished difference Result 2339 states and 4747 transitions. [2021-07-13 19:56:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:56:59,200 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:56:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:56:59,202 INFO L225 Difference]: With dead ends: 2339 [2021-07-13 19:56:59,202 INFO L226 Difference]: Without dead ends: 2297 [2021-07-13 19:56:59,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 651.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:56:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2021-07-13 19:56:59,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1365. [2021-07-13 19:56:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-07-13 19:56:59,222 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-07-13 19:56:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:56:59,222 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-07-13 19:56:59,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:56:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-07-13 19:56:59,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:56:59,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:56:59,223 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:56:59,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:56:59,437 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:56:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:56:59,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1455840993, now seen corresponding path program 65 times [2021-07-13 19:56:59,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:56:59,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137108838] [2021-07-13 19:56:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:56:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:56:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:56:59,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:56:59,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137108838] [2021-07-13 19:56:59,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137108838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:56:59,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058003774] [2021-07-13 19:56:59,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:56:59,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:56:59,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:56:59,710 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:56:59,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:00,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:00,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:00,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:00,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:00,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-07-13 19:57:00,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:00,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:00,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:00,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-07-13 19:57:00,238 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:00,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058003774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:00,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:00,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-07-13 19:57:00,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783369469] [2021-07-13 19:57:00,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 19:57:00,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:00,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 19:57:00,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:57:00,239 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:00,736 INFO L93 Difference]: Finished difference Result 2510 states and 5065 transitions. [2021-07-13 19:57:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:00,737 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:00,739 INFO L225 Difference]: With dead ends: 2510 [2021-07-13 19:57:00,739 INFO L226 Difference]: Without dead ends: 2465 [2021-07-13 19:57:00,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:57:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-07-13 19:57:00,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1365. [2021-07-13 19:57:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1364 states have (on average 1.9963343108504399) internal successors, (2723), 1364 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2723 transitions. [2021-07-13 19:57:00,762 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2723 transitions. Word has length 36 [2021-07-13 19:57:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:00,762 INFO L482 AbstractCegarLoop]: Abstraction has 1365 states and 2723 transitions. [2021-07-13 19:57:00,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2723 transitions. [2021-07-13 19:57:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:00,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:00,763 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:00,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:00,977 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -817973173, now seen corresponding path program 66 times [2021-07-13 19:57:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:00,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434195787] [2021-07-13 19:57:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:01,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:01,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434195787] [2021-07-13 19:57:01,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434195787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:01,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617995207] [2021-07-13 19:57:01,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:01,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:57:01,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:01,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:01,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:02,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:02,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:02,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:02,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:02,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:02,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 37 [2021-07-13 19:57:02,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:02,675 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-07-13 19:57:02,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:02,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-07-13 19:57:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:02,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617995207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:02,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:02,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 19:57:02,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892596461] [2021-07-13 19:57:02,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:57:02,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:02,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:57:02,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:02,714 INFO L87 Difference]: Start difference. First operand 1365 states and 2723 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:05,387 INFO L93 Difference]: Finished difference Result 2490 states and 5033 transitions. [2021-07-13 19:57:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:57:05,387 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:05,390 INFO L225 Difference]: With dead ends: 2490 [2021-07-13 19:57:05,390 INFO L226 Difference]: Without dead ends: 2398 [2021-07-13 19:57:05,390 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2187.0ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:57:05,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2398 states. [2021-07-13 19:57:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2398 to 1439. [2021-07-13 19:57:05,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.0180806675938805) internal successors, (2902), 1438 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2902 transitions. [2021-07-13 19:57:05,405 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2902 transitions. Word has length 36 [2021-07-13 19:57:05,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:05,405 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 2902 transitions. [2021-07-13 19:57:05,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:05,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2902 transitions. [2021-07-13 19:57:05,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:05,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:05,407 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:05,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:05,607 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1925362883, now seen corresponding path program 67 times [2021-07-13 19:57:05,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:05,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782324691] [2021-07-13 19:57:05,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:05,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782324691] [2021-07-13 19:57:05,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782324691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:05,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413958342] [2021-07-13 19:57:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:05,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:05,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:06,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:06,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:06,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:06,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:06,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:06,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:06,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:06,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:06,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:06,384 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:06,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413958342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:06,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:06,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 19:57:06,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73950808] [2021-07-13 19:57:06,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:57:06,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:06,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:57:06,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:06,385 INFO L87 Difference]: Start difference. First operand 1439 states and 2902 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:06,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:06,887 INFO L93 Difference]: Finished difference Result 2160 states and 4385 transitions. [2021-07-13 19:57:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:57:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:06,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:06,890 INFO L225 Difference]: With dead ends: 2160 [2021-07-13 19:57:06,890 INFO L226 Difference]: Without dead ends: 2137 [2021-07-13 19:57:06,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 638.0ms TimeCoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:57:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-07-13 19:57:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1445. [2021-07-13 19:57:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1444 states have (on average 2.018698060941828) internal successors, (2915), 1444 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2915 transitions. [2021-07-13 19:57:06,905 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2915 transitions. Word has length 36 [2021-07-13 19:57:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:06,906 INFO L482 AbstractCegarLoop]: Abstraction has 1445 states and 2915 transitions. [2021-07-13 19:57:06,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:06,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2915 transitions. [2021-07-13 19:57:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:06,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:06,907 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:07,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:07,108 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:07,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:07,108 INFO L82 PathProgramCache]: Analyzing trace with hash -325263507, now seen corresponding path program 68 times [2021-07-13 19:57:07,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:07,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919737181] [2021-07-13 19:57:07,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:07,293 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:07,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:07,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919737181] [2021-07-13 19:57:07,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919737181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:07,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134328507] [2021-07-13 19:57:07,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:07,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:07,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:07,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:07,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:07,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:07,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:07,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:07,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:07,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:07,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:07,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134328507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:07,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:07,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 19:57:07,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547916214] [2021-07-13 19:57:07,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:57:07,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:07,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:57:07,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:07,754 INFO L87 Difference]: Start difference. First operand 1445 states and 2915 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:08,033 INFO L93 Difference]: Finished difference Result 2272 states and 4614 transitions. [2021-07-13 19:57:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:57:08,033 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:08,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:08,035 INFO L225 Difference]: With dead ends: 2272 [2021-07-13 19:57:08,036 INFO L226 Difference]: Without dead ends: 2213 [2021-07-13 19:57:08,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 495.6ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:08,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-07-13 19:57:08,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1517. [2021-07-13 19:57:08,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 2.0118733509234827) internal successors, (3050), 1516 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 3050 transitions. [2021-07-13 19:57:08,051 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 3050 transitions. Word has length 36 [2021-07-13 19:57:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 1517 states and 3050 transitions. [2021-07-13 19:57:08,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 3050 transitions. [2021-07-13 19:57:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:08,052 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:08,052 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:08,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 19:57:08,253 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:08,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:08,253 INFO L82 PathProgramCache]: Analyzing trace with hash 214571523, now seen corresponding path program 69 times [2021-07-13 19:57:08,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:08,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363409130] [2021-07-13 19:57:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:08,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:08,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363409130] [2021-07-13 19:57:08,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363409130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:08,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192750331] [2021-07-13 19:57:08,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:08,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:57:08,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:08,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:08,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:08,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:08,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:08,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:08,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:08,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:08,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:08,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:08,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:08,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:08,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192750331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:08,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:08,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:08,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843106635] [2021-07-13 19:57:08,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:08,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:08,925 INFO L87 Difference]: Start difference. First operand 1517 states and 3050 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:09,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:09,312 INFO L93 Difference]: Finished difference Result 2702 states and 5500 transitions. [2021-07-13 19:57:09,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:09,312 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:09,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:09,315 INFO L225 Difference]: With dead ends: 2702 [2021-07-13 19:57:09,315 INFO L226 Difference]: Without dead ends: 2605 [2021-07-13 19:57:09,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:09,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-07-13 19:57:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1571. [2021-07-13 19:57:09,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-07-13 19:57:09,337 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-07-13 19:57:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:09,337 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-07-13 19:57:09,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:09,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-07-13 19:57:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:09,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:09,339 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:09,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:09,540 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:09,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:09,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2059242643, now seen corresponding path program 70 times [2021-07-13 19:57:09,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:09,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551810221] [2021-07-13 19:57:09,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:09,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:09,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551810221] [2021-07-13 19:57:09,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551810221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:09,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771177449] [2021-07-13 19:57:09,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:09,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:09,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:09,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:09,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:10,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:10,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:10,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:10,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:10,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:10,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:10,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:10,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:10,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:10,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771177449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:10,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:10,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:10,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024624870] [2021-07-13 19:57:10,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:10,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:10,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:10,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:10,202 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:10,478 INFO L93 Difference]: Finished difference Result 2210 states and 4470 transitions. [2021-07-13 19:57:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:10,481 INFO L225 Difference]: With dead ends: 2210 [2021-07-13 19:57:10,481 INFO L226 Difference]: Without dead ends: 2188 [2021-07-13 19:57:10,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 514.4ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-07-13 19:57:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1571. [2021-07-13 19:57:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.0114649681528665) internal successors, (3158), 1570 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3158 transitions. [2021-07-13 19:57:10,496 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3158 transitions. Word has length 36 [2021-07-13 19:57:10,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:10,496 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 3158 transitions. [2021-07-13 19:57:10,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:10,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3158 transitions. [2021-07-13 19:57:10,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:10,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:10,498 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:10,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:10,701 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash -729133199, now seen corresponding path program 71 times [2021-07-13 19:57:10,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:10,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24445738] [2021-07-13 19:57:10,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:57:10,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:10,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24445738] [2021-07-13 19:57:10,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24445738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:10,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199829313] [2021-07-13 19:57:10,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:10,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:57:10,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:10,931 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:57:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:11,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:11,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:11,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:11,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:11,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:11,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:11,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:11,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:11,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:11,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199829313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:11,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:11,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 19:57:11,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13125810] [2021-07-13 19:57:11,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:57:11,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:11,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:57:11,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:11,378 INFO L87 Difference]: Start difference. First operand 1571 states and 3158 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:11,767 INFO L93 Difference]: Finished difference Result 2485 states and 5026 transitions. [2021-07-13 19:57:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:11,779 INFO L225 Difference]: With dead ends: 2485 [2021-07-13 19:57:11,779 INFO L226 Difference]: Without dead ends: 2254 [2021-07-13 19:57:11,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 595.2ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:11,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-07-13 19:57:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1582. [2021-07-13 19:57:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 2.001897533206831) internal successors, (3165), 1581 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 3165 transitions. [2021-07-13 19:57:11,795 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 3165 transitions. Word has length 36 [2021-07-13 19:57:11,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:11,795 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 3165 transitions. [2021-07-13 19:57:11,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 3165 transitions. [2021-07-13 19:57:11,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:11,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:11,797 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:11,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:11,997 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:11,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:11,997 INFO L82 PathProgramCache]: Analyzing trace with hash 103525963, now seen corresponding path program 72 times [2021-07-13 19:57:11,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:11,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866960462] [2021-07-13 19:57:11,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:12,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:12,255 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:12,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:12,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866960462] [2021-07-13 19:57:12,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866960462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:12,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283976288] [2021-07-13 19:57:12,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:57:12,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:57:12,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:12,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:12,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:12,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:12,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:12,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:12,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:12,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:12,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:12,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:12,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:12,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:12,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283976288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:12,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:12,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:12,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130175854] [2021-07-13 19:57:12,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:12,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:12,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:12,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:12,766 INFO L87 Difference]: Start difference. First operand 1582 states and 3165 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:13,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:13,019 INFO L93 Difference]: Finished difference Result 2739 states and 5530 transitions. [2021-07-13 19:57:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:13,020 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:13,022 INFO L225 Difference]: With dead ends: 2739 [2021-07-13 19:57:13,022 INFO L226 Difference]: Without dead ends: 2676 [2021-07-13 19:57:13,023 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 597.8ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-07-13 19:57:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1621. [2021-07-13 19:57:13,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 2.0) internal successors, (3240), 1620 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 3240 transitions. [2021-07-13 19:57:13,039 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 3240 transitions. Word has length 36 [2021-07-13 19:57:13,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:13,039 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 3240 transitions. [2021-07-13 19:57:13,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:13,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 3240 transitions. [2021-07-13 19:57:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:13,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:13,041 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:13,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 19:57:13,241 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:13,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2124679093, now seen corresponding path program 73 times [2021-07-13 19:57:13,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:13,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453263065] [2021-07-13 19:57:13,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:13,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:13,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453263065] [2021-07-13 19:57:13,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453263065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:13,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787537401] [2021-07-13 19:57:13,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:13,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:13,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:13,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:13,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:13,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:13,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:13,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:13,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:13,938 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:13,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:13,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:13,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:13,952 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:13,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787537401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:13,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:13,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:13,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122158390] [2021-07-13 19:57:13,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:13,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:13,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:13,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:13,953 INFO L87 Difference]: Start difference. First operand 1621 states and 3240 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:14,232 INFO L93 Difference]: Finished difference Result 2343 states and 4717 transitions. [2021-07-13 19:57:14,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:14,232 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:14,235 INFO L225 Difference]: With dead ends: 2343 [2021-07-13 19:57:14,235 INFO L226 Difference]: Without dead ends: 2321 [2021-07-13 19:57:14,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:14,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2021-07-13 19:57:14,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1627. [2021-07-13 19:57:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-07-13 19:57:14,251 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-07-13 19:57:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:14,251 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-07-13 19:57:14,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:14,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-07-13 19:57:14,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:14,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:14,259 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:14,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:14,459 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:14,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:14,459 INFO L82 PathProgramCache]: Analyzing trace with hash 573047853, now seen corresponding path program 74 times [2021-07-13 19:57:14,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:14,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176408426] [2021-07-13 19:57:14,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:14,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:14,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176408426] [2021-07-13 19:57:14,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176408426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:14,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180865688] [2021-07-13 19:57:14,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:14,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:14,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:14,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:57:14,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:15,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:15,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:15,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:15,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-07-13 19:57:15,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:15,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:15,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:15,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-07-13 19:57:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:15,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180865688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:15,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:15,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:15,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024220704] [2021-07-13 19:57:15,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:15,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:15,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:15,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:15,166 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:15,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:15,497 INFO L93 Difference]: Finished difference Result 2287 states and 4610 transitions. [2021-07-13 19:57:15,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:57:15,498 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:15,500 INFO L225 Difference]: With dead ends: 2287 [2021-07-13 19:57:15,500 INFO L226 Difference]: Without dead ends: 2264 [2021-07-13 19:57:15,500 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-07-13 19:57:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1627. [2021-07-13 19:57:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1627 states, 1626 states have (on average 2.0) internal successors, (3252), 1626 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 3252 transitions. [2021-07-13 19:57:15,516 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 3252 transitions. Word has length 36 [2021-07-13 19:57:15,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:15,516 INFO L482 AbstractCegarLoop]: Abstraction has 1627 states and 3252 transitions. [2021-07-13 19:57:15,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:15,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 3252 transitions. [2021-07-13 19:57:15,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:15,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:15,518 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:15,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 19:57:15,719 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:15,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1638712185, now seen corresponding path program 75 times [2021-07-13 19:57:15,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:15,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731020719] [2021-07-13 19:57:15,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:57:15,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:15,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731020719] [2021-07-13 19:57:15,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731020719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:15,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658417521] [2021-07-13 19:57:15,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:15,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:57:15,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:15,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:16,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:16,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:16,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:16,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:16,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:16,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:16,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:16,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:16,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:16,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658417521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:16,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:16,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 19:57:16,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216049527] [2021-07-13 19:57:16,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:57:16,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:16,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:57:16,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:16,401 INFO L87 Difference]: Start difference. First operand 1627 states and 3252 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:16,671 INFO L93 Difference]: Finished difference Result 2567 states and 5154 transitions. [2021-07-13 19:57:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:16,672 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:16,674 INFO L225 Difference]: With dead ends: 2567 [2021-07-13 19:57:16,674 INFO L226 Difference]: Without dead ends: 2346 [2021-07-13 19:57:16,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 615.0ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-07-13 19:57:16,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1699. [2021-07-13 19:57:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 1.9976442873969376) internal successors, (3392), 1698 states have internal predecessors, (3392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 3392 transitions. [2021-07-13 19:57:16,691 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 3392 transitions. Word has length 36 [2021-07-13 19:57:16,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:16,691 INFO L482 AbstractCegarLoop]: Abstraction has 1699 states and 3392 transitions. [2021-07-13 19:57:16,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:16,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 3392 transitions. [2021-07-13 19:57:16,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:16,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:16,692 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:16,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:16,893 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1182283007, now seen corresponding path program 76 times [2021-07-13 19:57:16,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:16,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215541982] [2021-07-13 19:57:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:17,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:17,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215541982] [2021-07-13 19:57:17,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215541982] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:17,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488779870] [2021-07-13 19:57:17,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:17,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:17,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:17,140 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:17,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:17,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:17,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:17,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:17,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:17,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:17,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:17,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:17,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488779870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:17,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:17,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:17,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290371644] [2021-07-13 19:57:17,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:17,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:17,600 INFO L87 Difference]: Start difference. First operand 1699 states and 3392 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:17,870 INFO L93 Difference]: Finished difference Result 3110 states and 6274 transitions. [2021-07-13 19:57:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:57:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:17,873 INFO L225 Difference]: With dead ends: 3110 [2021-07-13 19:57:17,873 INFO L226 Difference]: Without dead ends: 3051 [2021-07-13 19:57:17,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-07-13 19:57:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 1690. [2021-07-13 19:57:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.9964476021314388) internal successors, (3372), 1689 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 3372 transitions. [2021-07-13 19:57:17,896 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 3372 transitions. Word has length 36 [2021-07-13 19:57:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:17,896 INFO L482 AbstractCegarLoop]: Abstraction has 1690 states and 3372 transitions. [2021-07-13 19:57:17,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:17,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 3372 transitions. [2021-07-13 19:57:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:17,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:17,898 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:18,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:18,113 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:18,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:18,113 INFO L82 PathProgramCache]: Analyzing trace with hash -806053023, now seen corresponding path program 77 times [2021-07-13 19:57:18,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:18,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004828675] [2021-07-13 19:57:18,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:18,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:18,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004828675] [2021-07-13 19:57:18,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004828675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:18,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430070225] [2021-07-13 19:57:18,331 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:18,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:57:18,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:18,355 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:18,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:18,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:18,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:18,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:18,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:18,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:18,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:18,822 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:18,831 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:18,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430070225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:18,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:18,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:18,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042787482] [2021-07-13 19:57:18,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:18,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:18,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:18,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:18,832 INFO L87 Difference]: Start difference. First operand 1690 states and 3372 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:19,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:19,234 INFO L93 Difference]: Finished difference Result 2909 states and 5872 transitions. [2021-07-13 19:57:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:19,236 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:19,238 INFO L225 Difference]: With dead ends: 2909 [2021-07-13 19:57:19,238 INFO L226 Difference]: Without dead ends: 2846 [2021-07-13 19:57:19,239 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 563.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-07-13 19:57:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1717. [2021-07-13 19:57:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 1.9965034965034965) internal successors, (3426), 1716 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:19,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 3426 transitions. [2021-07-13 19:57:19,261 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 3426 transitions. Word has length 36 [2021-07-13 19:57:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:19,262 INFO L482 AbstractCegarLoop]: Abstraction has 1717 states and 3426 transitions. [2021-07-13 19:57:19,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 3426 transitions. [2021-07-13 19:57:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:19,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:19,263 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:19,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:19,464 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100107, now seen corresponding path program 78 times [2021-07-13 19:57:19,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:19,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974515987] [2021-07-13 19:57:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:19,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:19,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974515987] [2021-07-13 19:57:19,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974515987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:19,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459427687] [2021-07-13 19:57:19,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:19,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:57:19,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:19,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:19,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:20,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:20,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:20,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:20,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:20,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:20,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:20,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:20,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:20,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:20,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:20,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459427687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:20,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:20,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:20,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913210299] [2021-07-13 19:57:20,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:20,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:20,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:20,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:20,179 INFO L87 Difference]: Start difference. First operand 1717 states and 3426 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:20,551 INFO L93 Difference]: Finished difference Result 2369 states and 4761 transitions. [2021-07-13 19:57:20,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:20,551 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:20,554 INFO L225 Difference]: With dead ends: 2369 [2021-07-13 19:57:20,554 INFO L226 Difference]: Without dead ends: 2347 [2021-07-13 19:57:20,554 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-07-13 19:57:20,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1726. [2021-07-13 19:57:20,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-07-13 19:57:20,571 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-07-13 19:57:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:20,571 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-07-13 19:57:20,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-07-13 19:57:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:20,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:20,573 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:20,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:20,774 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:20,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:20,774 INFO L82 PathProgramCache]: Analyzing trace with hash -336531133, now seen corresponding path program 79 times [2021-07-13 19:57:20,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:20,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439723751] [2021-07-13 19:57:20,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:21,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:21,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439723751] [2021-07-13 19:57:21,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439723751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:21,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307598188] [2021-07-13 19:57:21,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:21,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:21,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:21,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:21,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:21,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:21,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:21,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:21,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:21,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:21,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307598188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:21,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:21,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:21,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565394404] [2021-07-13 19:57:21,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:21,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:21,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:21,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:21,510 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:21,877 INFO L93 Difference]: Finished difference Result 2328 states and 4682 transitions. [2021-07-13 19:57:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:57:21,877 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:21,880 INFO L225 Difference]: With dead ends: 2328 [2021-07-13 19:57:21,880 INFO L226 Difference]: Without dead ends: 2305 [2021-07-13 19:57:21,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-07-13 19:57:21,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1726. [2021-07-13 19:57:21,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.9965217391304348) internal successors, (3444), 1725 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:21,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 3444 transitions. [2021-07-13 19:57:21,897 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 3444 transitions. Word has length 36 [2021-07-13 19:57:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:21,897 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 3444 transitions. [2021-07-13 19:57:21,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 3444 transitions. [2021-07-13 19:57:21,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:21,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:21,899 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:22,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:22,113 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:22,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:22,113 INFO L82 PathProgramCache]: Analyzing trace with hash 666409005, now seen corresponding path program 80 times [2021-07-13 19:57:22,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:22,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589131656] [2021-07-13 19:57:22,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:22,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589131656] [2021-07-13 19:57:22,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589131656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:22,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110146254] [2021-07-13 19:57:22,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:22,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:22,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:22,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:57:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:22,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:22,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:22,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:22,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:22,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:22,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-07-13 19:57:22,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:22,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:22,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:22,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-07-13 19:57:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:22,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110146254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:22,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:22,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:22,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365543838] [2021-07-13 19:57:22,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:22,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:22,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:22,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:22,824 INFO L87 Difference]: Start difference. First operand 1726 states and 3444 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:23,144 INFO L93 Difference]: Finished difference Result 2252 states and 4526 transitions. [2021-07-13 19:57:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:57:23,144 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:23,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:23,147 INFO L225 Difference]: With dead ends: 2252 [2021-07-13 19:57:23,147 INFO L226 Difference]: Without dead ends: 2228 [2021-07-13 19:57:23,147 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 557.8ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:23,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-07-13 19:57:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 1729. [2021-07-13 19:57:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.9965277777777777) internal successors, (3450), 1728 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 3450 transitions. [2021-07-13 19:57:23,163 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 3450 transitions. Word has length 36 [2021-07-13 19:57:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:23,163 INFO L482 AbstractCegarLoop]: Abstraction has 1729 states and 3450 transitions. [2021-07-13 19:57:23,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 3450 transitions. [2021-07-13 19:57:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:23,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:23,165 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:23,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:23,381 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:23,381 INFO L82 PathProgramCache]: Analyzing trace with hash -30986797, now seen corresponding path program 81 times [2021-07-13 19:57:23,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:23,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692805673] [2021-07-13 19:57:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:57:23,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:23,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692805673] [2021-07-13 19:57:23,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692805673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:23,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932607168] [2021-07-13 19:57:23,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:23,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:57:23,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:23,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:24,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:24,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:24,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:24,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:24,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:24,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:24,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:24,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:24,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:24,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:24,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932607168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:24,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:24,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2021-07-13 19:57:24,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20391456] [2021-07-13 19:57:24,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:24,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:24,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:24,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:24,111 INFO L87 Difference]: Start difference. First operand 1729 states and 3450 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:24,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:24,653 INFO L93 Difference]: Finished difference Result 3640 states and 7355 transitions. [2021-07-13 19:57:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:24,654 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:24,658 INFO L225 Difference]: With dead ends: 3640 [2021-07-13 19:57:24,658 INFO L226 Difference]: Without dead ends: 3597 [2021-07-13 19:57:24,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:57:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2021-07-13 19:57:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 1800. [2021-07-13 19:57:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 1.991106170094497) internal successors, (3582), 1799 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:24,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 3582 transitions. [2021-07-13 19:57:24,678 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 3582 transitions. Word has length 36 [2021-07-13 19:57:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:24,678 INFO L482 AbstractCegarLoop]: Abstraction has 1800 states and 3582 transitions. [2021-07-13 19:57:24,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:24,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 3582 transitions. [2021-07-13 19:57:24,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:24,680 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:24,681 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:24,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:24,881 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:24,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:24,881 INFO L82 PathProgramCache]: Analyzing trace with hash 564785227, now seen corresponding path program 82 times [2021-07-13 19:57:24,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:24,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811449983] [2021-07-13 19:57:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:25,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:25,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811449983] [2021-07-13 19:57:25,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811449983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:25,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484734826] [2021-07-13 19:57:25,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:25,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:25,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:25,134 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:25,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:25,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:25,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:25,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:25,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:25,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:25,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:25,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:25,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:25,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:25,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484734826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:25,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:25,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 19:57:25,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977482715] [2021-07-13 19:57:25,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:57:25,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:25,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:57:25,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:25,656 INFO L87 Difference]: Start difference. First operand 1800 states and 3582 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:26,136 INFO L93 Difference]: Finished difference Result 3718 states and 7520 transitions. [2021-07-13 19:57:26,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:57:26,137 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:26,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:26,141 INFO L225 Difference]: With dead ends: 3718 [2021-07-13 19:57:26,141 INFO L226 Difference]: Without dead ends: 3670 [2021-07-13 19:57:26,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 718.6ms TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:57:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2021-07-13 19:57:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 1884. [2021-07-13 19:57:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 1.9867233138608604) internal successors, (3741), 1883 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 3741 transitions. [2021-07-13 19:57:26,163 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 3741 transitions. Word has length 36 [2021-07-13 19:57:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:26,163 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 3741 transitions. [2021-07-13 19:57:26,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 3741 transitions. [2021-07-13 19:57:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:26,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:26,165 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:26,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 19:57:26,381 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash 453739667, now seen corresponding path program 83 times [2021-07-13 19:57:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:26,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828408121] [2021-07-13 19:57:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:26,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:26,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828408121] [2021-07-13 19:57:26,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828408121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:26,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013018117] [2021-07-13 19:57:26,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:26,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:57:26,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:26,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:57:26,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:27,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:27,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:27,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:27,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:27,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:27,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:27,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:27,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013018117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:27,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:27,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 19:57:27,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870097649] [2021-07-13 19:57:27,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:57:27,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:27,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:57:27,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:27,162 INFO L87 Difference]: Start difference. First operand 1884 states and 3741 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:27,747 INFO L93 Difference]: Finished difference Result 3721 states and 7510 transitions. [2021-07-13 19:57:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:27,747 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:27,751 INFO L225 Difference]: With dead ends: 3721 [2021-07-13 19:57:27,752 INFO L226 Difference]: Without dead ends: 3678 [2021-07-13 19:57:27,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 742.4ms TimeCoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:57:27,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3678 states. [2021-07-13 19:57:27,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3678 to 1956. [2021-07-13 19:57:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 1.984143222506394) internal successors, (3879), 1955 states have internal predecessors, (3879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 3879 transitions. [2021-07-13 19:57:27,775 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 3879 transitions. Word has length 36 [2021-07-13 19:57:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:27,775 INFO L482 AbstractCegarLoop]: Abstraction has 1956 states and 3879 transitions. [2021-07-13 19:57:27,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 3879 transitions. [2021-07-13 19:57:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:27,777 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:27,777 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:27,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:27,981 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1097891573, now seen corresponding path program 84 times [2021-07-13 19:57:27,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:27,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950285013] [2021-07-13 19:57:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:28,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:28,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950285013] [2021-07-13 19:57:28,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950285013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:28,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691934638] [2021-07-13 19:57:28,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:28,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:57:28,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:28,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:28,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:28,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:28,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:28,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:28,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:28,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:28,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:28,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:28,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:28,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691934638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:28,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:28,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-07-13 19:57:28,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441552744] [2021-07-13 19:57:28,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-13 19:57:28,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-13 19:57:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:28,757 INFO L87 Difference]: Start difference. First operand 1956 states and 3879 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:29,398 INFO L93 Difference]: Finished difference Result 3689 states and 7457 transitions. [2021-07-13 19:57:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:57:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:29,403 INFO L225 Difference]: With dead ends: 3689 [2021-07-13 19:57:29,403 INFO L226 Difference]: Without dead ends: 3644 [2021-07-13 19:57:29,403 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 763.0ms TimeCoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:57:29,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-07-13 19:57:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 1973. [2021-07-13 19:57:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.9852941176470589) internal successors, (3915), 1972 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 3915 transitions. [2021-07-13 19:57:29,424 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 3915 transitions. Word has length 36 [2021-07-13 19:57:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:29,425 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 3915 transitions. [2021-07-13 19:57:29,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 3915 transitions. [2021-07-13 19:57:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:29,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:29,426 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:29,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 19:57:29,629 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash -787529803, now seen corresponding path program 85 times [2021-07-13 19:57:29,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:29,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783949664] [2021-07-13 19:57:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:29,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:29,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783949664] [2021-07-13 19:57:29,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783949664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:29,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49571706] [2021-07-13 19:57:29,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:29,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:30,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:30,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:30,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:30,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:30,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:30,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:30,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:30,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:30,319 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:30,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49571706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:30,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:30,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:30,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258094315] [2021-07-13 19:57:30,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:30,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:30,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:30,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:30,327 INFO L87 Difference]: Start difference. First operand 1973 states and 3915 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:30,805 INFO L93 Difference]: Finished difference Result 3068 states and 6162 transitions. [2021-07-13 19:57:30,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:30,806 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:30,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:30,809 INFO L225 Difference]: With dead ends: 3068 [2021-07-13 19:57:30,809 INFO L226 Difference]: Without dead ends: 3006 [2021-07-13 19:57:30,809 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 555.9ms TimeCoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:30,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2021-07-13 19:57:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 1967. [2021-07-13 19:57:30,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 1.9852492370295016) internal successors, (3903), 1966 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 3903 transitions. [2021-07-13 19:57:30,831 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 3903 transitions. Word has length 36 [2021-07-13 19:57:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:30,831 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 3903 transitions. [2021-07-13 19:57:30,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 3903 transitions. [2021-07-13 19:57:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:30,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:30,832 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:31,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:31,048 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:31,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:31,048 INFO L82 PathProgramCache]: Analyzing trace with hash -898575363, now seen corresponding path program 86 times [2021-07-13 19:57:31,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:31,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072242606] [2021-07-13 19:57:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:31,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:31,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072242606] [2021-07-13 19:57:31,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072242606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:31,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042112243] [2021-07-13 19:57:31,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:31,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:31,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:31,316 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:31,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:31,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:31,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:31,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:31,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:31,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:31,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042112243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:31,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:31,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:31,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732805862] [2021-07-13 19:57:31,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:31,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:31,796 INFO L87 Difference]: Start difference. First operand 1967 states and 3903 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:32,216 INFO L93 Difference]: Finished difference Result 3053 states and 6129 transitions. [2021-07-13 19:57:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:32,216 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:32,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:32,219 INFO L225 Difference]: With dead ends: 3053 [2021-07-13 19:57:32,219 INFO L226 Difference]: Without dead ends: 2991 [2021-07-13 19:57:32,219 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 601.5ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:32,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2991 states. [2021-07-13 19:57:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2991 to 1964. [2021-07-13 19:57:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1963 states have (on average 1.9852266938359653) internal successors, (3897), 1963 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 3897 transitions. [2021-07-13 19:57:32,238 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 3897 transitions. Word has length 36 [2021-07-13 19:57:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:32,238 INFO L482 AbstractCegarLoop]: Abstraction has 1964 states and 3897 transitions. [2021-07-13 19:57:32,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 3897 transitions. [2021-07-13 19:57:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:32,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:32,240 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:32,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:32,440 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:32,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1844760693, now seen corresponding path program 87 times [2021-07-13 19:57:32,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:32,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183544584] [2021-07-13 19:57:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:32,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183544584] [2021-07-13 19:57:32,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183544584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396532922] [2021-07-13 19:57:32,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:32,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:57:32,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:32,706 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:32,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:33,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:33,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:33,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:33,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:33,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:33,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:33,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:33,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:33,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:33,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396532922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:33,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:33,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:33,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877940092] [2021-07-13 19:57:33,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:33,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:33,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:33,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:33,210 INFO L87 Difference]: Start difference. First operand 1964 states and 3897 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:33,636 INFO L93 Difference]: Finished difference Result 3170 states and 6381 transitions. [2021-07-13 19:57:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:33,636 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:33,639 INFO L225 Difference]: With dead ends: 3170 [2021-07-13 19:57:33,639 INFO L226 Difference]: Without dead ends: 3105 [2021-07-13 19:57:33,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2021-07-13 19:57:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 1988. [2021-07-13 19:57:33,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 1.9838953195772522) internal successors, (3942), 1987 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3942 transitions. [2021-07-13 19:57:33,659 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3942 transitions. Word has length 36 [2021-07-13 19:57:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:33,659 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 3942 transitions. [2021-07-13 19:57:33,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3942 transitions. [2021-07-13 19:57:33,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:33,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:33,661 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:33,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:33,861 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1808154349, now seen corresponding path program 88 times [2021-07-13 19:57:33,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:33,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725156183] [2021-07-13 19:57:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:34,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:34,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725156183] [2021-07-13 19:57:34,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725156183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:34,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242175371] [2021-07-13 19:57:34,098 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:34,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:34,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:34,122 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:34,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:34,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:34,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:34,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:34,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:34,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:34,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:34,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:34,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242175371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:34,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:34,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:34,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482457429] [2021-07-13 19:57:34,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:34,604 INFO L87 Difference]: Start difference. First operand 1988 states and 3942 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:35,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:35,130 INFO L93 Difference]: Finished difference Result 3044 states and 6092 transitions. [2021-07-13 19:57:35,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:35,131 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:35,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:35,134 INFO L225 Difference]: With dead ends: 3044 [2021-07-13 19:57:35,134 INFO L226 Difference]: Without dead ends: 3002 [2021-07-13 19:57:35,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 581.2ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:35,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-07-13 19:57:35,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 1982. [2021-07-13 19:57:35,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:35,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-07-13 19:57:35,165 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-07-13 19:57:35,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:35,165 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-07-13 19:57:35,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:35,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-07-13 19:57:35,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:35,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:35,167 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:35,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:35,367 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:35,368 INFO L82 PathProgramCache]: Analyzing trace with hash 935181707, now seen corresponding path program 89 times [2021-07-13 19:57:35,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:35,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863850619] [2021-07-13 19:57:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:35,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:35,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:35,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863850619] [2021-07-13 19:57:35,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863850619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:35,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287114978] [2021-07-13 19:57:35,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:35,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:57:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:35,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:35,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:36,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:36,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:36,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:36,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:36,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:36,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:36,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287114978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:36,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:36,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:36,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877701516] [2021-07-13 19:57:36,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:36,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:36,106 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:36,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:36,643 INFO L93 Difference]: Finished difference Result 2927 states and 5852 transitions. [2021-07-13 19:57:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:36,644 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:36,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:36,647 INFO L225 Difference]: With dead ends: 2927 [2021-07-13 19:57:36,647 INFO L226 Difference]: Without dead ends: 2904 [2021-07-13 19:57:36,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 597.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-07-13 19:57:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1985. [2021-07-13 19:57:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1985 states, 1984 states have (on average 1.9838709677419355) internal successors, (3936), 1984 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 3936 transitions. [2021-07-13 19:57:36,666 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 3936 transitions. Word has length 36 [2021-07-13 19:57:36,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:36,666 INFO L482 AbstractCegarLoop]: Abstraction has 1985 states and 3936 transitions. [2021-07-13 19:57:36,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:36,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 3936 transitions. [2021-07-13 19:57:36,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:36,668 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:36,668 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:36,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 19:57:36,868 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:36,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:36,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1938121845, now seen corresponding path program 90 times [2021-07-13 19:57:36,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:36,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878959576] [2021-07-13 19:57:36,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:37,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:37,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878959576] [2021-07-13 19:57:37,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878959576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:37,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895770985] [2021-07-13 19:57:37,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:37,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:57:37,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:37,119 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:37,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:37,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:37,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:37,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:37,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:37,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:37,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:37,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:37,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:37,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:37,611 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895770985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:37,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:37,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348670933] [2021-07-13 19:57:37,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:37,620 INFO L87 Difference]: Start difference. First operand 1985 states and 3936 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:38,117 INFO L93 Difference]: Finished difference Result 2935 states and 5869 transitions. [2021-07-13 19:57:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:57:38,117 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:38,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:38,120 INFO L225 Difference]: With dead ends: 2935 [2021-07-13 19:57:38,121 INFO L226 Difference]: Without dead ends: 2911 [2021-07-13 19:57:38,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 596.0ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-07-13 19:57:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 1982. [2021-07-13 19:57:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 1.983846542150429) internal successors, (3930), 1981 states have internal predecessors, (3930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 3930 transitions. [2021-07-13 19:57:38,145 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 3930 transitions. Word has length 36 [2021-07-13 19:57:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:38,145 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 3930 transitions. [2021-07-13 19:57:38,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 3930 transitions. [2021-07-13 19:57:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:38,147 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:38,147 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:38,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:38,363 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:38,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1884098707, now seen corresponding path program 91 times [2021-07-13 19:57:38,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:38,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169278647] [2021-07-13 19:57:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:57:38,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169278647] [2021-07-13 19:57:38,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169278647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:38,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190072124] [2021-07-13 19:57:38,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:38,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:38,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:38,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:39,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:39,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:39,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:39,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:39,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:39,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:39,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:39,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:39,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:39,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:39,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:39,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:39,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190072124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:39,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:39,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 19:57:39,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340037717] [2021-07-13 19:57:39,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:57:39,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:57:39,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:39,023 INFO L87 Difference]: Start difference. First operand 1982 states and 3930 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:39,516 INFO L93 Difference]: Finished difference Result 3201 states and 6417 transitions. [2021-07-13 19:57:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:39,519 INFO L225 Difference]: With dead ends: 3201 [2021-07-13 19:57:39,519 INFO L226 Difference]: Without dead ends: 3012 [2021-07-13 19:57:39,520 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 613.2ms TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:39,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3012 states. [2021-07-13 19:57:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3012 to 2015. [2021-07-13 19:57:39,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 1.9821251241310824) internal successors, (3992), 2014 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 3992 transitions. [2021-07-13 19:57:39,539 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 3992 transitions. Word has length 36 [2021-07-13 19:57:39,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:39,539 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 3992 transitions. [2021-07-13 19:57:39,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 3992 transitions. [2021-07-13 19:57:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:39,541 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:39,541 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:39,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 19:57:39,748 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:39,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:39,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1940533323, now seen corresponding path program 92 times [2021-07-13 19:57:39,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:39,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681009663] [2021-07-13 19:57:39,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:39,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:39,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681009663] [2021-07-13 19:57:39,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681009663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:39,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784326841] [2021-07-13 19:57:39,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:39,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:39,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:39,954 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:40,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:40,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:40,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:40,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:40,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:40,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:40,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:40,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:40,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784326841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:40,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:40,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 19:57:40,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757313431] [2021-07-13 19:57:40,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:57:40,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:40,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:57:40,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:40,400 INFO L87 Difference]: Start difference. First operand 2015 states and 3992 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:40,890 INFO L93 Difference]: Finished difference Result 3283 states and 6567 transitions. [2021-07-13 19:57:40,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:57:40,890 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:40,894 INFO L225 Difference]: With dead ends: 3283 [2021-07-13 19:57:40,894 INFO L226 Difference]: Without dead ends: 3078 [2021-07-13 19:57:40,894 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 668.0ms TimeCoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:57:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-07-13 19:57:40,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2009. [2021-07-13 19:57:40,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 1.9810756972111554) internal successors, (3978), 2008 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 3978 transitions. [2021-07-13 19:57:40,913 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 3978 transitions. Word has length 36 [2021-07-13 19:57:40,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:40,913 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 3978 transitions. [2021-07-13 19:57:40,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:40,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 3978 transitions. [2021-07-13 19:57:40,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:40,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:40,915 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:41,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:41,116 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:41,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:41,116 INFO L82 PathProgramCache]: Analyzing trace with hash 518734893, now seen corresponding path program 93 times [2021-07-13 19:57:41,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:41,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035249164] [2021-07-13 19:57:41,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:41,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:41,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035249164] [2021-07-13 19:57:41,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035249164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:41,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284308075] [2021-07-13 19:57:41,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:41,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:57:41,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:41,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:41,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:41,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:41,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:41,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:41,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:41,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:41,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:41,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:41,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:41,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:41,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:41,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284308075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:41,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:41,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:41,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453299379] [2021-07-13 19:57:41,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:41,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:41,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:41,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:41,823 INFO L87 Difference]: Start difference. First operand 2009 states and 3978 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:42,221 INFO L93 Difference]: Finished difference Result 2891 states and 5824 transitions. [2021-07-13 19:57:42,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:42,221 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:42,224 INFO L225 Difference]: With dead ends: 2891 [2021-07-13 19:57:42,224 INFO L226 Difference]: Without dead ends: 2834 [2021-07-13 19:57:42,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 557.7ms TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-07-13 19:57:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2006. [2021-07-13 19:57:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 1.9810473815461347) internal successors, (3972), 2005 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 3972 transitions. [2021-07-13 19:57:42,242 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 3972 transitions. Word has length 36 [2021-07-13 19:57:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:42,243 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 3972 transitions. [2021-07-13 19:57:42,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 3972 transitions. [2021-07-13 19:57:42,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:42,244 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:42,244 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:42,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:42,445 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:42,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:42,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1829487763, now seen corresponding path program 94 times [2021-07-13 19:57:42,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:42,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47986077] [2021-07-13 19:57:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:42,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:42,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:42,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47986077] [2021-07-13 19:57:42,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47986077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:42,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806468484] [2021-07-13 19:57:42,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:42,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:42,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:42,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:43,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:43,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:43,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:43,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:43,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:43,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:43,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:43,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:43,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:43,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806468484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:43,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:43,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:43,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259420896] [2021-07-13 19:57:43,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:43,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:43,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:43,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:43,136 INFO L87 Difference]: Start difference. First operand 2006 states and 3972 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:43,680 INFO L93 Difference]: Finished difference Result 3270 states and 6540 transitions. [2021-07-13 19:57:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:57:43,680 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:43,684 INFO L225 Difference]: With dead ends: 3270 [2021-07-13 19:57:43,684 INFO L226 Difference]: Without dead ends: 3074 [2021-07-13 19:57:43,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 760.6ms TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:57:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-07-13 19:57:43,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2030. [2021-07-13 19:57:43,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.9817644159684573) internal successors, (4021), 2029 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 4021 transitions. [2021-07-13 19:57:43,703 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 4021 transitions. Word has length 36 [2021-07-13 19:57:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:43,704 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 4021 transitions. [2021-07-13 19:57:43,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 4021 transitions. [2021-07-13 19:57:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:43,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:43,705 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:43,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 19:57:43,906 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:43,906 INFO L82 PathProgramCache]: Analyzing trace with hash 407689333, now seen corresponding path program 95 times [2021-07-13 19:57:43,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:43,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745667149] [2021-07-13 19:57:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:43,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:44,139 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:44,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:44,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745667149] [2021-07-13 19:57:44,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745667149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:44,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42864689] [2021-07-13 19:57:44,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:44,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:57:44,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:44,165 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:44,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:44,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:44,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:44,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:44,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:44,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:44,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:44,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:44,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:44,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42864689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:44,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:44,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:44,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386738386] [2021-07-13 19:57:44,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:44,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:44,634 INFO L87 Difference]: Start difference. First operand 2030 states and 4021 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:44,983 INFO L93 Difference]: Finished difference Result 3018 states and 6082 transitions. [2021-07-13 19:57:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:44,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:44,986 INFO L225 Difference]: With dead ends: 3018 [2021-07-13 19:57:44,986 INFO L226 Difference]: Without dead ends: 2956 [2021-07-13 19:57:44,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 586.7ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2956 states. [2021-07-13 19:57:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2956 to 2051. [2021-07-13 19:57:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-07-13 19:57:45,018 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-07-13 19:57:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:45,018 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-07-13 19:57:45,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-07-13 19:57:45,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:45,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:45,020 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:45,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 19:57:45,221 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:45,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1143941907, now seen corresponding path program 96 times [2021-07-13 19:57:45,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:45,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899310064] [2021-07-13 19:57:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:45,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:45,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:45,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899310064] [2021-07-13 19:57:45,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899310064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:45,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224977202] [2021-07-13 19:57:45,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:45,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:57:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:45,493 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:57:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:45,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:45,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:45,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:45,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:45,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-07-13 19:57:45,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:45,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:45,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:45,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-07-13 19:57:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:45,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224977202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:45,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:45,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:45,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950673911] [2021-07-13 19:57:45,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:45,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:45,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:45,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:45,981 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:46,284 INFO L93 Difference]: Finished difference Result 2747 states and 5507 transitions. [2021-07-13 19:57:46,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:57:46,285 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:46,287 INFO L225 Difference]: With dead ends: 2747 [2021-07-13 19:57:46,287 INFO L226 Difference]: Without dead ends: 2724 [2021-07-13 19:57:46,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-07-13 19:57:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2051. [2021-07-13 19:57:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 1.9834146341463414) internal successors, (4066), 2050 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:46,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 4066 transitions. [2021-07-13 19:57:46,306 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 4066 transitions. Word has length 36 [2021-07-13 19:57:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:46,307 INFO L482 AbstractCegarLoop]: Abstraction has 2051 states and 4066 transitions. [2021-07-13 19:57:46,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 4066 transitions. [2021-07-13 19:57:46,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:46,308 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:46,308 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:46,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:46,509 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:46,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:46,509 INFO L82 PathProgramCache]: Analyzing trace with hash 939265351, now seen corresponding path program 97 times [2021-07-13 19:57:46,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:46,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227801051] [2021-07-13 19:57:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:57:46,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227801051] [2021-07-13 19:57:46,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227801051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:46,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568510700] [2021-07-13 19:57:46,746 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:46,769 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:47,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:47,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:47,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:47,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:47,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:47,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:47,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:47,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:47,220 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568510700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:47,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:47,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 19:57:47,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779989990] [2021-07-13 19:57:47,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:57:47,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:47,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:57:47,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:47,229 INFO L87 Difference]: Start difference. First operand 2051 states and 4066 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:47,644 INFO L93 Difference]: Finished difference Result 3042 states and 6095 transitions. [2021-07-13 19:57:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:57:47,644 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:47,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:47,647 INFO L225 Difference]: With dead ends: 3042 [2021-07-13 19:57:47,647 INFO L226 Difference]: Without dead ends: 2834 [2021-07-13 19:57:47,648 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 664.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-07-13 19:57:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 2141. [2021-07-13 19:57:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 1.983177570093458) internal successors, (4244), 2140 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 4244 transitions. [2021-07-13 19:57:47,667 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 4244 transitions. Word has length 36 [2021-07-13 19:57:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:47,667 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 4244 transitions. [2021-07-13 19:57:47,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:47,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 4244 transitions. [2021-07-13 19:57:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:47,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:47,669 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:47,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:57:47,869 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:47,870 INFO L82 PathProgramCache]: Analyzing trace with hash -534706753, now seen corresponding path program 98 times [2021-07-13 19:57:47,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:47,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011453637] [2021-07-13 19:57:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:48,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:48,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011453637] [2021-07-13 19:57:48,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011453637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:48,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666704164] [2021-07-13 19:57:48,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:48,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:48,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:48,129 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:48,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:48,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:48,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:48,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:48,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:48,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:48,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:48,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:48,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:48,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:48,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666704164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:48,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:48,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:48,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318528052] [2021-07-13 19:57:48,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:48,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:48,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:48,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:48,591 INFO L87 Difference]: Start difference. First operand 2141 states and 4244 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:48,928 INFO L93 Difference]: Finished difference Result 3881 states and 7802 transitions. [2021-07-13 19:57:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:57:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:48,932 INFO L225 Difference]: With dead ends: 3881 [2021-07-13 19:57:48,932 INFO L226 Difference]: Without dead ends: 3816 [2021-07-13 19:57:48,932 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-07-13 19:57:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2072. [2021-07-13 19:57:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 1.981651376146789) internal successors, (4104), 2071 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 4104 transitions. [2021-07-13 19:57:48,954 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 4104 transitions. Word has length 36 [2021-07-13 19:57:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:48,954 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 4104 transitions. [2021-07-13 19:57:48,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:48,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 4104 transitions. [2021-07-13 19:57:48,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:48,956 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:48,956 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:49,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 19:57:49,157 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:49,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:49,157 INFO L82 PathProgramCache]: Analyzing trace with hash -501889653, now seen corresponding path program 99 times [2021-07-13 19:57:49,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:49,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415794310] [2021-07-13 19:57:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:49,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:49,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415794310] [2021-07-13 19:57:49,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415794310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:49,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448115834] [2021-07-13 19:57:49,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:49,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:57:49,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:49,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:49,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:49,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:49,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:49,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:49,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:49,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:49,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:49,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:49,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448115834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:49,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:49,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:49,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070467306] [2021-07-13 19:57:49,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:49,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:49,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:49,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:49,896 INFO L87 Difference]: Start difference. First operand 2072 states and 4104 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:50,313 INFO L93 Difference]: Finished difference Result 3168 states and 6373 transitions. [2021-07-13 19:57:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:50,313 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:50,317 INFO L225 Difference]: With dead ends: 3168 [2021-07-13 19:57:50,317 INFO L226 Difference]: Without dead ends: 3111 [2021-07-13 19:57:50,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 590.7ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3111 states. [2021-07-13 19:57:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3111 to 2114. [2021-07-13 19:57:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-07-13 19:57:50,338 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-07-13 19:57:50,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:50,338 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-07-13 19:57:50,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-07-13 19:57:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:50,340 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:50,340 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:50,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 19:57:50,541 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2053520893, now seen corresponding path program 100 times [2021-07-13 19:57:50,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:50,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690434720] [2021-07-13 19:57:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:50,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:50,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690434720] [2021-07-13 19:57:50,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690434720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:50,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196988945] [2021-07-13 19:57:50,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:50,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:50,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:50,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:50,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:51,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:51,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:51,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:51,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:51,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:51,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:51,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196988945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:51,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:51,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:51,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420184853] [2021-07-13 19:57:51,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:51,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:51,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:51,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:51,325 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:51,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:51,680 INFO L93 Difference]: Finished difference Result 2764 states and 5529 transitions. [2021-07-13 19:57:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:57:51,681 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:51,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:51,684 INFO L225 Difference]: With dead ends: 2764 [2021-07-13 19:57:51,684 INFO L226 Difference]: Without dead ends: 2741 [2021-07-13 19:57:51,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-07-13 19:57:51,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 2114. [2021-07-13 19:57:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-07-13 19:57:51,703 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-07-13 19:57:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:51,703 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-07-13 19:57:51,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-07-13 19:57:51,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:51,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:51,705 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:51,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:51,921 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:51,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1050580755, now seen corresponding path program 101 times [2021-07-13 19:57:51,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:51,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622911063] [2021-07-13 19:57:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:52,152 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:52,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:52,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622911063] [2021-07-13 19:57:52,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622911063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:52,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891069659] [2021-07-13 19:57:52,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:52,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:57:52,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:52,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:52,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:52,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:52,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:52,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:52,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:52,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:52,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:52,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:52,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:52,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:52,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891069659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:52,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:52,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:52,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651817489] [2021-07-13 19:57:52,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:52,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:52,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:52,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:52,657 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:53,091 INFO L93 Difference]: Finished difference Result 2775 states and 5552 transitions. [2021-07-13 19:57:53,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:57:53,091 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:53,094 INFO L225 Difference]: With dead ends: 2775 [2021-07-13 19:57:53,094 INFO L226 Difference]: Without dead ends: 2751 [2021-07-13 19:57:53,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2021-07-13 19:57:53,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2114. [2021-07-13 19:57:53,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.9820160908660671) internal successors, (4188), 2113 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 4188 transitions. [2021-07-13 19:57:53,115 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 4188 transitions. Word has length 36 [2021-07-13 19:57:53,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:53,115 INFO L482 AbstractCegarLoop]: Abstraction has 2114 states and 4188 transitions. [2021-07-13 19:57:53,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 4188 transitions. [2021-07-13 19:57:53,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:53,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:53,117 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:53,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 19:57:53,317 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:53,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:53,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1598664591, now seen corresponding path program 102 times [2021-07-13 19:57:53,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:53,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052832452] [2021-07-13 19:57:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:57:53,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:53,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052832452] [2021-07-13 19:57:53,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052832452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:53,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810648061] [2021-07-13 19:57:53,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:53,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:57:53,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:53,556 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:57:53,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:54,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:54,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:54,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:54,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:54,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:54,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:54,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:54,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:54,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:54,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:54,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810648061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:54,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:54,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 28 [2021-07-13 19:57:54,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474620402] [2021-07-13 19:57:54,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:57:54,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:54,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:57:54,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:57:54,038 INFO L87 Difference]: Start difference. First operand 2114 states and 4188 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:54,458 INFO L93 Difference]: Finished difference Result 3031 states and 6075 transitions. [2021-07-13 19:57:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:54,462 INFO L225 Difference]: With dead ends: 3031 [2021-07-13 19:57:54,462 INFO L226 Difference]: Without dead ends: 2851 [2021-07-13 19:57:54,462 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 653.2ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-07-13 19:57:54,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2204. [2021-07-13 19:57:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9809350885156605) internal successors, (4364), 2203 states have internal predecessors, (4364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4364 transitions. [2021-07-13 19:57:54,482 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4364 transitions. Word has length 36 [2021-07-13 19:57:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:54,482 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4364 transitions. [2021-07-13 19:57:54,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4364 transitions. [2021-07-13 19:57:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:54,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:54,484 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:54,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 19:57:54,684 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:54,684 INFO L82 PathProgramCache]: Analyzing trace with hash 124692487, now seen corresponding path program 103 times [2021-07-13 19:57:54,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:54,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264513292] [2021-07-13 19:57:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:54,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:54,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:54,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264513292] [2021-07-13 19:57:54,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264513292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:54,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959111236] [2021-07-13 19:57:54,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:54,958 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:55,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:55,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:55,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:55,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:55,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:55,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:55,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:55,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:55,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:55,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959111236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:55,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:55,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:55,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134735786] [2021-07-13 19:57:55,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:55,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:55,450 INFO L87 Difference]: Start difference. First operand 2204 states and 4364 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:55,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:55,767 INFO L93 Difference]: Finished difference Result 3432 states and 6914 transitions. [2021-07-13 19:57:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:57:55,768 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:55,777 INFO L225 Difference]: With dead ends: 3432 [2021-07-13 19:57:55,777 INFO L226 Difference]: Without dead ends: 3379 [2021-07-13 19:57:55,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3379 states. [2021-07-13 19:57:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3379 to 2192. [2021-07-13 19:57:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2192 states, 2191 states have (on average 1.9808306709265175) internal successors, (4340), 2191 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 4340 transitions. [2021-07-13 19:57:55,798 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 4340 transitions. Word has length 36 [2021-07-13 19:57:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:55,798 INFO L482 AbstractCegarLoop]: Abstraction has 2192 states and 4340 transitions. [2021-07-13 19:57:55,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 4340 transitions. [2021-07-13 19:57:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:55,800 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:55,800 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:56,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:56,000 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:56,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:56,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1579308017, now seen corresponding path program 104 times [2021-07-13 19:57:56,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:56,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336887812] [2021-07-13 19:57:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:56,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:56,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336887812] [2021-07-13 19:57:56,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336887812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:56,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613070764] [2021-07-13 19:57:56,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:56,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:57:56,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:56,231 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:56,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:56,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:56,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:56,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:56,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:56,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:56,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:56,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:56,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:56,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:56,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:56,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613070764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:56,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:56,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:57:56,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652698708] [2021-07-13 19:57:56,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:57:56,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:56,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:57:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:57:56,693 INFO L87 Difference]: Start difference. First operand 2192 states and 4340 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:56,951 INFO L93 Difference]: Finished difference Result 3344 states and 6703 transitions. [2021-07-13 19:57:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:57:56,952 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:56,955 INFO L225 Difference]: With dead ends: 3344 [2021-07-13 19:57:56,955 INFO L226 Difference]: Without dead ends: 3283 [2021-07-13 19:57:56,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-07-13 19:57:56,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2207. [2021-07-13 19:57:56,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2206 states have (on average 1.9805077062556664) internal successors, (4369), 2206 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 4369 transitions. [2021-07-13 19:57:56,976 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 4369 transitions. Word has length 36 [2021-07-13 19:57:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:56,976 INFO L482 AbstractCegarLoop]: Abstraction has 2207 states and 4369 transitions. [2021-07-13 19:57:56,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:56,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 4369 transitions. [2021-07-13 19:57:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:56,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:56,978 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:57,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:57,193 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:57,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:57,193 INFO L82 PathProgramCache]: Analyzing trace with hash 157509587, now seen corresponding path program 105 times [2021-07-13 19:57:57,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:57,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997076628] [2021-07-13 19:57:57,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:57,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997076628] [2021-07-13 19:57:57,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997076628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270657910] [2021-07-13 19:57:57,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:57,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:57:57,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:57,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:57,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:57,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:57,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:57,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:57,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:57,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:57,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:57,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:57,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270657910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:57,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:57,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:57,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681345620] [2021-07-13 19:57:57,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:57,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:57,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:57,961 INFO L87 Difference]: Start difference. First operand 2207 states and 4369 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:58,431 INFO L93 Difference]: Finished difference Result 3254 states and 6538 transitions. [2021-07-13 19:57:58,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:57:58,431 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:58,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:58,435 INFO L225 Difference]: With dead ends: 3254 [2021-07-13 19:57:58,435 INFO L226 Difference]: Without dead ends: 3197 [2021-07-13 19:57:58,435 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:58,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-07-13 19:57:58,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2195. [2021-07-13 19:57:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2194 states have (on average 1.980401093892434) internal successors, (4345), 2194 states have internal predecessors, (4345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 4345 transitions. [2021-07-13 19:57:58,456 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 4345 transitions. Word has length 36 [2021-07-13 19:57:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:58,456 INFO L482 AbstractCegarLoop]: Abstraction has 2195 states and 4345 transitions. [2021-07-13 19:57:58,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 4345 transitions. [2021-07-13 19:57:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:58,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:58,458 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:58,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:58,673 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:58,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1394121653, now seen corresponding path program 106 times [2021-07-13 19:57:58,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:58,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337315544] [2021-07-13 19:57:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:57:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:58,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:57:58,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337315544] [2021-07-13 19:57:58,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337315544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:58,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061817872] [2021-07-13 19:57:58,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:58,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:57:58,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:57:58,930 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:57:58,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:57:59,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:59,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:59,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:59,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:57:59,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:57:59,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:57:59,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:57:59,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:57:59,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:57:59,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:57:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:57:59,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061817872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:57:59,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:57:59,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:57:59,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591845074] [2021-07-13 19:57:59,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:57:59,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:57:59,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:57:59,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:57:59,407 INFO L87 Difference]: Start difference. First operand 2195 states and 4345 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:57:59,749 INFO L93 Difference]: Finished difference Result 2867 states and 5731 transitions. [2021-07-13 19:57:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:57:59,749 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:57:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:57:59,752 INFO L225 Difference]: With dead ends: 2867 [2021-07-13 19:57:59,752 INFO L226 Difference]: Without dead ends: 2844 [2021-07-13 19:57:59,752 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 594.4ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:57:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2021-07-13 19:57:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2204. [2021-07-13 19:57:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-07-13 19:57:59,771 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-07-13 19:57:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:57:59,771 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-07-13 19:57:59,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:57:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-07-13 19:57:59,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:57:59,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:57:59,773 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:57:59,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:57:59,974 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:57:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:57:59,974 INFO L82 PathProgramCache]: Analyzing trace with hash -391181515, now seen corresponding path program 107 times [2021-07-13 19:57:59,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:57:59,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836980567] [2021-07-13 19:57:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:57:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:00,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:00,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836980567] [2021-07-13 19:58:00,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836980567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:00,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088850750] [2021-07-13 19:58:00,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:00,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:58:00,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:00,225 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:00,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:00,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:00,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:00,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:00,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:00,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:00,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:00,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:00,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:00,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:00,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:00,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088850750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:00,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:00,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:58:00,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290297680] [2021-07-13 19:58:00,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:58:00,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:58:00,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:00,725 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:01,167 INFO L93 Difference]: Finished difference Result 2878 states and 5754 transitions. [2021-07-13 19:58:01,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:58:01,167 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:01,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:01,170 INFO L225 Difference]: With dead ends: 2878 [2021-07-13 19:58:01,170 INFO L226 Difference]: Without dead ends: 2854 [2021-07-13 19:58:01,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:01,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2021-07-13 19:58:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2204. [2021-07-13 19:58:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.9804811620517475) internal successors, (4363), 2203 states have internal predecessors, (4363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 4363 transitions. [2021-07-13 19:58:01,190 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 4363 transitions. Word has length 36 [2021-07-13 19:58:01,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:01,190 INFO L482 AbstractCegarLoop]: Abstraction has 2204 states and 4363 transitions. [2021-07-13 19:58:01,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 4363 transitions. [2021-07-13 19:58:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:01,191 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:01,191 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:01,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 19:58:01,392 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:01,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1155151443, now seen corresponding path program 108 times [2021-07-13 19:58:01,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:01,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990062094] [2021-07-13 19:58:01,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:01,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:01,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990062094] [2021-07-13 19:58:01,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990062094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:01,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608651284] [2021-07-13 19:58:01,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:01,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:58:01,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:01,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:58:01,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:02,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:02,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:02,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:02,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:02,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:02,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:02,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:02,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:02,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:02,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608651284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:02,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:02,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:58:02,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115925729] [2021-07-13 19:58:02,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:58:02,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:02,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:58:02,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:02,201 INFO L87 Difference]: Start difference. First operand 2204 states and 4363 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:02,660 INFO L93 Difference]: Finished difference Result 3075 states and 6179 transitions. [2021-07-13 19:58:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:58:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:02,663 INFO L225 Difference]: With dead ends: 3075 [2021-07-13 19:58:02,663 INFO L226 Difference]: Without dead ends: 2931 [2021-07-13 19:58:02,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-07-13 19:58:02,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 2247. [2021-07-13 19:58:02,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 1.9821905609973285) internal successors, (4452), 2246 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 4452 transitions. [2021-07-13 19:58:02,682 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 4452 transitions. Word has length 36 [2021-07-13 19:58:02,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:02,682 INFO L482 AbstractCegarLoop]: Abstraction has 2247 states and 4452 transitions. [2021-07-13 19:58:02,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:02,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 4452 transitions. [2021-07-13 19:58:02,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:02,684 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:02,684 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:02,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 19:58:02,885 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:02,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1735088919, now seen corresponding path program 109 times [2021-07-13 19:58:02,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:02,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472934110] [2021-07-13 19:58:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:03,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:03,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472934110] [2021-07-13 19:58:03,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472934110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:03,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462265876] [2021-07-13 19:58:03,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:03,116 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:03,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:03,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:03,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:03,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:03,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:03,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:03,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:03,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:03,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:03,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462265876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:03,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:03,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 29 [2021-07-13 19:58:03,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761135184] [2021-07-13 19:58:03,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:03,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:03,581 INFO L87 Difference]: Start difference. First operand 2247 states and 4452 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:04,142 INFO L93 Difference]: Finished difference Result 4634 states and 9317 transitions. [2021-07-13 19:58:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:58:04,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:04,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:04,147 INFO L225 Difference]: With dead ends: 4634 [2021-07-13 19:58:04,148 INFO L226 Difference]: Without dead ends: 4591 [2021-07-13 19:58:04,148 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 633.5ms TimeCoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:58:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4591 states. [2021-07-13 19:58:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4591 to 2286. [2021-07-13 19:58:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 2285 states have (on average 1.9785557986870896) internal successors, (4521), 2285 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:04,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 4521 transitions. [2021-07-13 19:58:04,175 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 4521 transitions. Word has length 36 [2021-07-13 19:58:04,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:04,175 INFO L482 AbstractCegarLoop]: Abstraction has 2286 states and 4521 transitions. [2021-07-13 19:58:04,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:04,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 4521 transitions. [2021-07-13 19:58:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:04,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:04,177 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:04,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 19:58:04,377 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:04,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:04,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1139316895, now seen corresponding path program 110 times [2021-07-13 19:58:04,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:04,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031535221] [2021-07-13 19:58:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:04,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031535221] [2021-07-13 19:58:04,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031535221] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:04,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276704126] [2021-07-13 19:58:04,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:04,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:04,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:58:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:05,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:05,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:05,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:05,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 37 [2021-07-13 19:58:05,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:05,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:05,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:05,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:101, output treesize:10 [2021-07-13 19:58:05,090 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:05,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276704126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:05,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:05,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:58:05,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517391613] [2021-07-13 19:58:05,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:58:05,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:05,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:58:05,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:05,091 INFO L87 Difference]: Start difference. First operand 2286 states and 4521 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:05,679 INFO L93 Difference]: Finished difference Result 4423 states and 8911 transitions. [2021-07-13 19:58:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:05,679 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:05,684 INFO L225 Difference]: With dead ends: 4423 [2021-07-13 19:58:05,684 INFO L226 Difference]: Without dead ends: 4375 [2021-07-13 19:58:05,684 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:58:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2021-07-13 19:58:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 2331. [2021-07-13 19:58:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 1.978969957081545) internal successors, (4611), 2330 states have internal predecessors, (4611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4611 transitions. [2021-07-13 19:58:05,711 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4611 transitions. Word has length 36 [2021-07-13 19:58:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:05,711 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 4611 transitions. [2021-07-13 19:58:05,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4611 transitions. [2021-07-13 19:58:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:05,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:05,713 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:05,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:05,925 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1250362455, now seen corresponding path program 111 times [2021-07-13 19:58:05,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:05,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869013348] [2021-07-13 19:58:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:06,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869013348] [2021-07-13 19:58:06,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869013348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:06,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924107239] [2021-07-13 19:58:06,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:06,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:58:06,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:06,181 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:06,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:06,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:06,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:06,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:06,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:06,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:06,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:06,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:06,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:06,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:06,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924107239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:06,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:06,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:58:06,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993382564] [2021-07-13 19:58:06,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:58:06,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:06,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:58:06,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:06,657 INFO L87 Difference]: Start difference. First operand 2331 states and 4611 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:07,318 INFO L93 Difference]: Finished difference Result 4274 states and 8601 transitions. [2021-07-13 19:58:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:58:07,319 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:07,324 INFO L225 Difference]: With dead ends: 4274 [2021-07-13 19:58:07,324 INFO L226 Difference]: Without dead ends: 4231 [2021-07-13 19:58:07,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 717.4ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:58:07,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-07-13 19:58:07,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2382. [2021-07-13 19:58:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2382 states, 2381 states have (on average 1.9794204115917682) internal successors, (4713), 2381 states have internal predecessors, (4713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:07,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 4713 transitions. [2021-07-13 19:58:07,358 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 4713 transitions. Word has length 36 [2021-07-13 19:58:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:07,358 INFO L482 AbstractCegarLoop]: Abstraction has 2382 states and 4713 transitions. [2021-07-13 19:58:07,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 4713 transitions. [2021-07-13 19:58:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:07,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:07,360 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:07,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 19:58:07,561 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1492973601, now seen corresponding path program 112 times [2021-07-13 19:58:07,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:07,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458632422] [2021-07-13 19:58:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:07,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:07,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458632422] [2021-07-13 19:58:07,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458632422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:07,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327573869] [2021-07-13 19:58:07,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:07,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:07,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:07,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:07,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:08,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:08,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:08,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:08,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:08,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:08,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:08,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:08,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:08,319 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:08,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327573869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:08,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:08,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 30 [2021-07-13 19:58:08,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872224527] [2021-07-13 19:58:08,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-13 19:58:08,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:08,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-13 19:58:08,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:08,320 INFO L87 Difference]: Start difference. First operand 2382 states and 4713 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:09,043 INFO L93 Difference]: Finished difference Result 4262 states and 8590 transitions. [2021-07-13 19:58:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:58:09,043 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:09,048 INFO L225 Difference]: With dead ends: 4262 [2021-07-13 19:58:09,048 INFO L226 Difference]: Without dead ends: 4200 [2021-07-13 19:58:09,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 770.4ms TimeCoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:58:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-07-13 19:58:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 2372. [2021-07-13 19:58:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2371 states have (on average 1.9801771404470687) internal successors, (4695), 2371 states have internal predecessors, (4695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:09,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 4695 transitions. [2021-07-13 19:58:09,074 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 4695 transitions. Word has length 36 [2021-07-13 19:58:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:09,074 INFO L482 AbstractCegarLoop]: Abstraction has 2372 states and 4695 transitions. [2021-07-13 19:58:09,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:09,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 4695 transitions. [2021-07-13 19:58:09,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:09,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:09,076 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:09,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:09,277 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:09,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:09,277 INFO L82 PathProgramCache]: Analyzing trace with hash 140658571, now seen corresponding path program 113 times [2021-07-13 19:58:09,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:09,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108616123] [2021-07-13 19:58:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:09,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:09,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:09,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108616123] [2021-07-13 19:58:09,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108616123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:09,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121517199] [2021-07-13 19:58:09,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:09,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:58:09,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:09,537 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:58:09,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:10,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:10,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:10,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:10,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:10,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:10,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:10,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-07-13 19:58:10,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:10,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:10,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:10,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-07-13 19:58:10,097 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:10,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121517199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:10,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:10,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-07-13 19:58:10,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55036113] [2021-07-13 19:58:10,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 19:58:10,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:10,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 19:58:10,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:58:10,098 INFO L87 Difference]: Start difference. First operand 2372 states and 4695 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:11,500 INFO L93 Difference]: Finished difference Result 3919 states and 7823 transitions. [2021-07-13 19:58:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:58:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:11,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:11,503 INFO L225 Difference]: With dead ends: 3919 [2021-07-13 19:58:11,503 INFO L226 Difference]: Without dead ends: 3722 [2021-07-13 19:58:11,504 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1301.5ms TimeCoverageRelationStatistics Valid=184, Invalid=2168, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:58:11,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2021-07-13 19:58:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 2432. [2021-07-13 19:58:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2432 states, 2431 states have (on average 1.9819004524886878) internal successors, (4818), 2431 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2432 states to 2432 states and 4818 transitions. [2021-07-13 19:58:11,527 INFO L78 Accepts]: Start accepts. Automaton has 2432 states and 4818 transitions. Word has length 36 [2021-07-13 19:58:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:11,527 INFO L482 AbstractCegarLoop]: Abstraction has 2432 states and 4818 transitions. [2021-07-13 19:58:11,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2432 states and 4818 transitions. [2021-07-13 19:58:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:11,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:11,529 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:11,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 19:58:11,729 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash -768920415, now seen corresponding path program 114 times [2021-07-13 19:58:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:11,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744968638] [2021-07-13 19:58:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:11,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:11,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744968638] [2021-07-13 19:58:11,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744968638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:11,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218066411] [2021-07-13 19:58:11,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:11,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:58:11,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:11,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:58:11,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:12,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:12,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:12,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:12,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:12,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:12,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:12,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218066411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:12,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:12,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 19:58:12,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727138500] [2021-07-13 19:58:12,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:12,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:12,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:12,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:12,458 INFO L87 Difference]: Start difference. First operand 2432 states and 4818 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:12,936 INFO L93 Difference]: Finished difference Result 3994 states and 7991 transitions. [2021-07-13 19:58:12,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:12,936 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:12,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:12,940 INFO L225 Difference]: With dead ends: 3994 [2021-07-13 19:58:12,940 INFO L226 Difference]: Without dead ends: 3807 [2021-07-13 19:58:12,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:12,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-07-13 19:58:12,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2486. [2021-07-13 19:58:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-07-13 19:58:12,965 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-07-13 19:58:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:12,965 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-07-13 19:58:12,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-07-13 19:58:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:12,967 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:12,967 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:13,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:13,167 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:13,168 INFO L82 PathProgramCache]: Analyzing trace with hash 234019723, now seen corresponding path program 115 times [2021-07-13 19:58:13,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:13,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897312902] [2021-07-13 19:58:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:13,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897312902] [2021-07-13 19:58:13,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897312902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:13,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495862149] [2021-07-13 19:58:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:13,432 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:13,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:13,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:13,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:13,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:13,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:13,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:13,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:13,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:13,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:13,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:13,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495862149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:13,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:13,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 19:58:13,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802080442] [2021-07-13 19:58:13,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:13,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:13,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:13,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:13,886 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:14,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:14,462 INFO L93 Difference]: Finished difference Result 3663 states and 7313 transitions. [2021-07-13 19:58:14,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:14,462 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:14,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:14,466 INFO L225 Difference]: With dead ends: 3663 [2021-07-13 19:58:14,466 INFO L226 Difference]: Without dead ends: 3639 [2021-07-13 19:58:14,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3639 states. [2021-07-13 19:58:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3639 to 2486. [2021-07-13 19:58:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 1.9847082494969819) internal successors, (4932), 2485 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 4932 transitions. [2021-07-13 19:58:14,489 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 4932 transitions. Word has length 36 [2021-07-13 19:58:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:14,489 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 4932 transitions. [2021-07-13 19:58:14,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 4932 transitions. [2021-07-13 19:58:14,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:14,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:14,491 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:14,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:14,692 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash 726123041, now seen corresponding path program 116 times [2021-07-13 19:58:14,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:14,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196577460] [2021-07-13 19:58:14,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:14,913 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:14,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:14,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196577460] [2021-07-13 19:58:14,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196577460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:14,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600548070] [2021-07-13 19:58:14,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:14,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:14,937 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:15,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:15,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:15,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:15,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:15,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:15,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:15,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:15,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:15,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600548070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:15,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:15,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 27 [2021-07-13 19:58:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993567187] [2021-07-13 19:58:15,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:58:15,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:15,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:58:15,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:58:15,352 INFO L87 Difference]: Start difference. First operand 2486 states and 4932 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:15,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:15,734 INFO L93 Difference]: Finished difference Result 3578 states and 7155 transitions. [2021-07-13 19:58:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:58:15,734 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:15,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:15,738 INFO L225 Difference]: With dead ends: 3578 [2021-07-13 19:58:15,738 INFO L226 Difference]: Without dead ends: 3364 [2021-07-13 19:58:15,738 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2021-07-13 19:58:15,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 2624. [2021-07-13 19:58:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 1.9797941288600838) internal successors, (5193), 2623 states have internal predecessors, (5193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:15,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 5193 transitions. [2021-07-13 19:58:15,761 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 5193 transitions. Word has length 36 [2021-07-13 19:58:15,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:15,762 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 5193 transitions. [2021-07-13 19:58:15,762 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) [2021-07-13 19:58:15,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 5193 transitions. [2021-07-13 19:58:15,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:15,764 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:15,764 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:15,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-13 19:58:15,964 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:15,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:15,964 INFO L82 PathProgramCache]: Analyzing trace with hash 144742215, now seen corresponding path program 117 times [2021-07-13 19:58:15,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:15,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589560831] [2021-07-13 19:58:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:58:16,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:16,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589560831] [2021-07-13 19:58:16,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589560831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:16,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052717285] [2021-07-13 19:58:16,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:16,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:58:16,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:16,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:16,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:16,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:16,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:16,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:16,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:16,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:16,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:16,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:16,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:16,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052717285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:16,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:16,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 26 [2021-07-13 19:58:16,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173257568] [2021-07-13 19:58:16,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:16,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:16,609 INFO L87 Difference]: Start difference. First operand 2624 states and 5193 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:17,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:17,037 INFO L93 Difference]: Finished difference Result 3703 states and 7416 transitions. [2021-07-13 19:58:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:58:17,037 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:17,040 INFO L225 Difference]: With dead ends: 3703 [2021-07-13 19:58:17,040 INFO L226 Difference]: Without dead ends: 3490 [2021-07-13 19:58:17,041 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 588.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-07-13 19:58:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2501. [2021-07-13 19:58:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-07-13 19:58:17,063 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-07-13 19:58:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:17,063 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-07-13 19:58:17,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-07-13 19:58:17,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:17,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:17,065 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:17,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 19:58:17,266 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:17,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:17,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1446923267, now seen corresponding path program 118 times [2021-07-13 19:58:17,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:17,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400552499] [2021-07-13 19:58:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:17,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400552499] [2021-07-13 19:58:17,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400552499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:17,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040859392] [2021-07-13 19:58:17,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:17,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:17,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:17,521 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:17,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:17,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:17,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:17,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:17,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:17,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:17,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:17,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:17,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040859392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:17,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:17,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 19:58:17,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154371966] [2021-07-13 19:58:17,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:17,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:17,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:17,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:17,980 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:18,557 INFO L93 Difference]: Finished difference Result 3628 states and 7297 transitions. [2021-07-13 19:58:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:18,562 INFO L225 Difference]: With dead ends: 3628 [2021-07-13 19:58:18,562 INFO L226 Difference]: Without dead ends: 3563 [2021-07-13 19:58:18,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 578.5ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-07-13 19:58:18,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 2501. [2021-07-13 19:58:18,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2500 states have (on average 1.982) internal successors, (4955), 2500 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:18,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 4955 transitions. [2021-07-13 19:58:18,586 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 4955 transitions. Word has length 36 [2021-07-13 19:58:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:18,586 INFO L482 AbstractCegarLoop]: Abstraction has 2501 states and 4955 transitions. [2021-07-13 19:58:18,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:18,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 4955 transitions. [2021-07-13 19:58:18,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:18,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:18,588 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:18,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:18,788 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:18,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:18,789 INFO L82 PathProgramCache]: Analyzing trace with hash 537344281, now seen corresponding path program 119 times [2021-07-13 19:58:18,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:18,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090060626] [2021-07-13 19:58:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:19,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:19,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090060626] [2021-07-13 19:58:19,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090060626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:19,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148319218] [2021-07-13 19:58:19,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:19,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:58:19,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:19,054 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:58:19,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:19,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:19,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:19,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:19,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-07-13 19:58:19,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:19,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:19,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:19,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-07-13 19:58:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:19,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148319218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:19,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:19,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-07-13 19:58:19,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332042203] [2021-07-13 19:58:19,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-13 19:58:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-13 19:58:19,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:58:19,611 INFO L87 Difference]: Start difference. First operand 2501 states and 4955 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:21,070 INFO L93 Difference]: Finished difference Result 3874 states and 7764 transitions. [2021-07-13 19:58:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:58:21,070 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:21,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:21,074 INFO L225 Difference]: With dead ends: 3874 [2021-07-13 19:58:21,074 INFO L226 Difference]: Without dead ends: 3713 [2021-07-13 19:58:21,074 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1470.9ms TimeCoverageRelationStatistics Valid=214, Invalid=2648, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:58:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-07-13 19:58:21,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 2540. [2021-07-13 19:58:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-07-13 19:58:21,098 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-07-13 19:58:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:21,098 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-07-13 19:58:21,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-07-13 19:58:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:21,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:21,100 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:21,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:58:21,300 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:21,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1540284419, now seen corresponding path program 120 times [2021-07-13 19:58:21,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:21,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253657848] [2021-07-13 19:58:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:21,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:21,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253657848] [2021-07-13 19:58:21,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253657848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:21,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532346827] [2021-07-13 19:58:21,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:21,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:58:21,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:21,555 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:22,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:22,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:22,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:22,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:22,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:22,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:22,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532346827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:22,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:22,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 19:58:22,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194671642] [2021-07-13 19:58:22,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:22,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:22,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:22,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:22,017 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:22,436 INFO L93 Difference]: Finished difference Result 3517 states and 7032 transitions. [2021-07-13 19:58:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:22,437 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:22,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:22,440 INFO L225 Difference]: With dead ends: 3517 [2021-07-13 19:58:22,440 INFO L226 Difference]: Without dead ends: 3493 [2021-07-13 19:58:22,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 585.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-07-13 19:58:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 2540. [2021-07-13 19:58:22,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 1.9838519102008665) internal successors, (5037), 2539 states have internal predecessors, (5037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 5037 transitions. [2021-07-13 19:58:22,464 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 5037 transitions. Word has length 36 [2021-07-13 19:58:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:22,464 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 5037 transitions. [2021-07-13 19:58:22,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 5037 transitions. [2021-07-13 19:58:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:22,466 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:22,466 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:22,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:22,667 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1196743521, now seen corresponding path program 121 times [2021-07-13 19:58:22,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:22,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765148891] [2021-07-13 19:58:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:22,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:22,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765148891] [2021-07-13 19:58:22,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765148891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:22,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730219782] [2021-07-13 19:58:22,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:22,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:23,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:23,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:23,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:23,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:23,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:23,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:23,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:23,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:23,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:23,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730219782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:23,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:23,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 19:58:23,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167462144] [2021-07-13 19:58:23,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:23,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:23,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:23,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:23,396 INFO L87 Difference]: Start difference. First operand 2540 states and 5037 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:23,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:23,832 INFO L93 Difference]: Finished difference Result 3604 states and 7227 transitions. [2021-07-13 19:58:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:23,836 INFO L225 Difference]: With dead ends: 3604 [2021-07-13 19:58:23,836 INFO L226 Difference]: Without dead ends: 3560 [2021-07-13 19:58:23,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:23,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-07-13 19:58:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2534. [2021-07-13 19:58:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-07-13 19:58:23,860 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-07-13 19:58:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:23,860 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-07-13 19:58:23,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-07-13 19:58:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:23,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:23,862 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:24,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 19:58:24,063 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2095283637, now seen corresponding path program 122 times [2021-07-13 19:58:24,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:24,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582193377] [2021-07-13 19:58:24,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:24,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582193377] [2021-07-13 19:58:24,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582193377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:24,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956692931] [2021-07-13 19:58:24,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:24,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:24,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:24,321 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:24,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:24,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:24,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:24,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:24,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:24,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:24,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:24,782 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:24,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:24,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956692931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:24,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:24,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 19:58:24,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753152985] [2021-07-13 19:58:24,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:24,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:24,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:24,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:24,790 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:25,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:25,448 INFO L93 Difference]: Finished difference Result 3514 states and 7026 transitions. [2021-07-13 19:58:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:25,453 INFO L225 Difference]: With dead ends: 3514 [2021-07-13 19:58:25,453 INFO L226 Difference]: Without dead ends: 3490 [2021-07-13 19:58:25,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 587.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:25,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2021-07-13 19:58:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 2531. [2021-07-13 19:58:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2531 states, 2530 states have (on average 1.9837944664031621) internal successors, (5019), 2530 states have internal predecessors, (5019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2531 states to 2531 states and 5019 transitions. [2021-07-13 19:58:25,478 INFO L78 Accepts]: Start accepts. Automaton has 2531 states and 5019 transitions. Word has length 36 [2021-07-13 19:58:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:25,478 INFO L482 AbstractCegarLoop]: Abstraction has 2531 states and 5019 transitions. [2021-07-13 19:58:25,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2531 states and 5019 transitions. [2021-07-13 19:58:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:25,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:25,480 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:25,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:25,681 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:25,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1435713731, now seen corresponding path program 123 times [2021-07-13 19:58:25,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:25,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142957681] [2021-07-13 19:58:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:25,939 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:25,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:25,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142957681] [2021-07-13 19:58:25,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142957681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:25,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090776976] [2021-07-13 19:58:25,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:25,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:58:25,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:25,979 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:25,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:26,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:26,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:26,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:26,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:26,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:26,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:26,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:26,463 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:26,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090776976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:26,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:26,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-07-13 19:58:26,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142348500] [2021-07-13 19:58:26,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-13 19:58:26,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:26,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-13 19:58:26,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:26,464 INFO L87 Difference]: Start difference. First operand 2531 states and 5019 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:27,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:27,069 INFO L93 Difference]: Finished difference Result 3529 states and 7060 transitions. [2021-07-13 19:58:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:27,069 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:27,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:27,073 INFO L225 Difference]: With dead ends: 3529 [2021-07-13 19:58:27,073 INFO L226 Difference]: Without dead ends: 3504 [2021-07-13 19:58:27,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3504 states. [2021-07-13 19:58:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3504 to 2534. [2021-07-13 19:58:27,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 1.9838136596920648) internal successors, (5025), 2533 states have internal predecessors, (5025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 5025 transitions. [2021-07-13 19:58:27,096 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 5025 transitions. Word has length 36 [2021-07-13 19:58:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:27,096 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 5025 transitions. [2021-07-13 19:58:27,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 5025 transitions. [2021-07-13 19:58:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:27,098 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:27,098 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:27,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 19:58:27,299 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:27,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1768497397, now seen corresponding path program 124 times [2021-07-13 19:58:27,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:27,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447812823] [2021-07-13 19:58:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:27,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:27,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447812823] [2021-07-13 19:58:27,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447812823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:27,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667479920] [2021-07-13 19:58:27,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:27,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:27,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:27,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:27,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:27,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:27,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:27,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:27,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:27,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:27,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:27,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:27,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:27,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667479920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:27,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:27,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-13 19:58:27,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981598291] [2021-07-13 19:58:27,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:27,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:27,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:27,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:27,927 INFO L87 Difference]: Start difference. First operand 2534 states and 5025 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:28,369 INFO L93 Difference]: Finished difference Result 3439 states and 6862 transitions. [2021-07-13 19:58:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:58:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:28,373 INFO L225 Difference]: With dead ends: 3439 [2021-07-13 19:58:28,373 INFO L226 Difference]: Without dead ends: 3280 [2021-07-13 19:58:28,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 614.6ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-07-13 19:58:28,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2606. [2021-07-13 19:58:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2605 states have (on average 1.982341650671785) internal successors, (5164), 2605 states have internal predecessors, (5164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 5164 transitions. [2021-07-13 19:58:28,397 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 5164 transitions. Word has length 36 [2021-07-13 19:58:28,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:28,397 INFO L482 AbstractCegarLoop]: Abstraction has 2606 states and 5164 transitions. [2021-07-13 19:58:28,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:28,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 5164 transitions. [2021-07-13 19:58:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:28,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:28,399 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:28,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 19:58:28,600 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1516299603, now seen corresponding path program 125 times [2021-07-13 19:58:28,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:28,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738694109] [2021-07-13 19:58:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:28,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:28,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738694109] [2021-07-13 19:58:28,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738694109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:28,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826967826] [2021-07-13 19:58:28,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:28,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:58:28,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:28,868 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:58:28,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:29,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:29,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:29,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:29,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:29,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:29,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:29,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:29,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:29,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826967826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:29,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:29,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-13 19:58:29,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037442578] [2021-07-13 19:58:29,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:29,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:29,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:29,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:29,261 INFO L87 Difference]: Start difference. First operand 2606 states and 5164 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:29,764 INFO L93 Difference]: Finished difference Result 3655 states and 7282 transitions. [2021-07-13 19:58:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:58:29,765 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:29,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:29,768 INFO L225 Difference]: With dead ends: 3655 [2021-07-13 19:58:29,769 INFO L226 Difference]: Without dead ends: 3429 [2021-07-13 19:58:29,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 656.6ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:29,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3429 states. [2021-07-13 19:58:29,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3429 to 2750. [2021-07-13 19:58:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2750 states, 2749 states have (on average 1.9774463441251364) internal successors, (5436), 2749 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:29,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2750 states to 2750 states and 5436 transitions. [2021-07-13 19:58:29,793 INFO L78 Accepts]: Start accepts. Automaton has 2750 states and 5436 transitions. Word has length 36 [2021-07-13 19:58:29,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:29,793 INFO L482 AbstractCegarLoop]: Abstraction has 2750 states and 5436 transitions. [2021-07-13 19:58:29,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2750 states and 5436 transitions. [2021-07-13 19:58:29,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:29,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:29,795 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:29,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:29,996 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:29,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1945089073, now seen corresponding path program 126 times [2021-07-13 19:58:29,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:29,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037105315] [2021-07-13 19:58:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:30,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:30,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037105315] [2021-07-13 19:58:30,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037105315] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:30,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336166116] [2021-07-13 19:58:30,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:30,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:58:30,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:30,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:30,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:30,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:30,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:30,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:30,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:30,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:30,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:30,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:30,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:30,672 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:30,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336166116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:30,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:30,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-07-13 19:58:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742187085] [2021-07-13 19:58:30,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:30,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:30,680 INFO L87 Difference]: Start difference. First operand 2750 states and 5436 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:31,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:31,136 INFO L93 Difference]: Finished difference Result 4517 states and 8999 transitions. [2021-07-13 19:58:31,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:58:31,136 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:31,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:31,141 INFO L225 Difference]: With dead ends: 4517 [2021-07-13 19:58:31,141 INFO L226 Difference]: Without dead ends: 4275 [2021-07-13 19:58:31,141 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 702.8ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:58:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-07-13 19:58:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3137. [2021-07-13 19:58:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3137 states, 3136 states have (on average 1.9716198979591837) internal successors, (6183), 3136 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3137 states to 3137 states and 6183 transitions. [2021-07-13 19:58:31,172 INFO L78 Accepts]: Start accepts. Automaton has 3137 states and 6183 transitions. Word has length 36 [2021-07-13 19:58:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:31,172 INFO L482 AbstractCegarLoop]: Abstraction has 3137 states and 6183 transitions. [2021-07-13 19:58:31,172 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) [2021-07-13 19:58:31,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3137 states and 6183 transitions. [2021-07-13 19:58:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:31,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:31,174 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:31,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:31,375 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:31,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:31,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1047697171, now seen corresponding path program 127 times [2021-07-13 19:58:31,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:31,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090228301] [2021-07-13 19:58:31,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:31,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:31,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090228301] [2021-07-13 19:58:31,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090228301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:31,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007940082] [2021-07-13 19:58:31,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:31,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:31,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:32,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:32,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:32,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:32,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:32,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:32,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:32,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:32,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:32,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007940082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:32,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:32,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 19:58:32,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074147685] [2021-07-13 19:58:32,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:32,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:32,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:32,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:32,059 INFO L87 Difference]: Start difference. First operand 3137 states and 6183 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:32,351 INFO L93 Difference]: Finished difference Result 4057 states and 8128 transitions. [2021-07-13 19:58:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:32,355 INFO L225 Difference]: With dead ends: 4057 [2021-07-13 19:58:32,355 INFO L226 Difference]: Without dead ends: 3966 [2021-07-13 19:58:32,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 556.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-07-13 19:58:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3158. [2021-07-13 19:58:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3158 states, 3157 states have (on average 1.9718086791257523) internal successors, (6225), 3157 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:32,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3158 states to 3158 states and 6225 transitions. [2021-07-13 19:58:32,384 INFO L78 Accepts]: Start accepts. Automaton has 3158 states and 6225 transitions. Word has length 36 [2021-07-13 19:58:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:32,384 INFO L482 AbstractCegarLoop]: Abstraction has 3158 states and 6225 transitions. [2021-07-13 19:58:32,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 3158 states and 6225 transitions. [2021-07-13 19:58:32,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:32,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:32,387 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:32,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:32,587 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:32,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1035510087, now seen corresponding path program 128 times [2021-07-13 19:58:32,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:32,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167028287] [2021-07-13 19:58:32,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:32,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:32,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167028287] [2021-07-13 19:58:32,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167028287] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:32,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978679548] [2021-07-13 19:58:32,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:32,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:32,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:32,826 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:32,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:33,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:33,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:33,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:33,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:33,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:33,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:33,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:33,229 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:33,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978679548] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:33,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:33,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-13 19:58:33,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645607925] [2021-07-13 19:58:33,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:33,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:33,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:33,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:33,229 INFO L87 Difference]: Start difference. First operand 3158 states and 6225 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:33,687 INFO L93 Difference]: Finished difference Result 4075 states and 8096 transitions. [2021-07-13 19:58:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:33,691 INFO L225 Difference]: With dead ends: 4075 [2021-07-13 19:58:33,691 INFO L226 Difference]: Without dead ends: 3853 [2021-07-13 19:58:33,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 647.0ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:33,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2021-07-13 19:58:33,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 3251. [2021-07-13 19:58:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3251 states, 3250 states have (on average 1.9726153846153847) internal successors, (6411), 3250 states have internal predecessors, (6411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3251 states to 3251 states and 6411 transitions. [2021-07-13 19:58:33,721 INFO L78 Accepts]: Start accepts. Automaton has 3251 states and 6411 transitions. Word has length 36 [2021-07-13 19:58:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:33,721 INFO L482 AbstractCegarLoop]: Abstraction has 3251 states and 6411 transitions. [2021-07-13 19:58:33,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3251 states and 6411 transitions. [2021-07-13 19:58:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:33,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:33,724 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:33,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:33,925 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:33,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:33,925 INFO L82 PathProgramCache]: Analyzing trace with hash -438462017, now seen corresponding path program 129 times [2021-07-13 19:58:33,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:33,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404537144] [2021-07-13 19:58:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:34,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:34,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404537144] [2021-07-13 19:58:34,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404537144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:34,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740984901] [2021-07-13 19:58:34,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:34,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:58:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:34,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:34,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:34,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:34,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:34,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:34,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:34,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:34,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:34,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:34,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740984901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:34,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:34,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-13 19:58:34,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344622878] [2021-07-13 19:58:34,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:58:34,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:58:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:58:34,595 INFO L87 Difference]: Start difference. First operand 3251 states and 6411 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:35,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:35,077 INFO L93 Difference]: Finished difference Result 5265 states and 10504 transitions. [2021-07-13 19:58:35,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:58:35,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:35,082 INFO L225 Difference]: With dead ends: 5265 [2021-07-13 19:58:35,082 INFO L226 Difference]: Without dead ends: 5202 [2021-07-13 19:58:35,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5202 states. [2021-07-13 19:58:35,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5202 to 3164. [2021-07-13 19:58:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3164 states, 3163 states have (on average 1.971862156180841) internal successors, (6237), 3163 states have internal predecessors, (6237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3164 states to 3164 states and 6237 transitions. [2021-07-13 19:58:35,125 INFO L78 Accepts]: Start accepts. Automaton has 3164 states and 6237 transitions. Word has length 36 [2021-07-13 19:58:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:35,125 INFO L482 AbstractCegarLoop]: Abstraction has 3164 states and 6237 transitions. [2021-07-13 19:58:35,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3164 states and 6237 transitions. [2021-07-13 19:58:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:35,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:35,127 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:35,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 19:58:35,328 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:35,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:35,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1957276157, now seen corresponding path program 130 times [2021-07-13 19:58:35,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:35,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856868543] [2021-07-13 19:58:35,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:35,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:35,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856868543] [2021-07-13 19:58:35,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856868543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:35,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583918061] [2021-07-13 19:58:35,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:35,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:35,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:35,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:36,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:36,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:36,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:36,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:36,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:36,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:36,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:36,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583918061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:36,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:36,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 19:58:36,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575250828] [2021-07-13 19:58:36,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:36,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:36,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:36,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:36,027 INFO L87 Difference]: Start difference. First operand 3164 states and 6237 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:36,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:36,396 INFO L93 Difference]: Finished difference Result 4252 states and 8498 transitions. [2021-07-13 19:58:36,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:36,396 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:36,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:36,401 INFO L225 Difference]: With dead ends: 4252 [2021-07-13 19:58:36,401 INFO L226 Difference]: Without dead ends: 4193 [2021-07-13 19:58:36,401 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-07-13 19:58:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3191. [2021-07-13 19:58:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-07-13 19:58:36,432 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-07-13 19:58:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:36,432 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-07-13 19:58:36,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-07-13 19:58:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:36,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:36,434 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:36,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 19:58:36,635 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:36,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:36,635 INFO L82 PathProgramCache]: Analyzing trace with hash -954336019, now seen corresponding path program 131 times [2021-07-13 19:58:36,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:36,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075802603] [2021-07-13 19:58:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:36,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:36,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075802603] [2021-07-13 19:58:36,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075802603] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:36,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43436761] [2021-07-13 19:58:36,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:36,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:58:36,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:36,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:36,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:37,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:37,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:37,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:37,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:37,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:37,310 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:37,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43436761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:37,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:37,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 19:58:37,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314640081] [2021-07-13 19:58:37,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:37,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:37,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:37,318 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:37,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:37,718 INFO L93 Difference]: Finished difference Result 3853 states and 7654 transitions. [2021-07-13 19:58:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:37,719 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:37,723 INFO L225 Difference]: With dead ends: 3853 [2021-07-13 19:58:37,723 INFO L226 Difference]: Without dead ends: 3829 [2021-07-13 19:58:37,723 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 557.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2021-07-13 19:58:37,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3191. [2021-07-13 19:58:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 3190 states have (on average 1.9721003134796238) internal successors, (6291), 3190 states have internal predecessors, (6291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 6291 transitions. [2021-07-13 19:58:37,752 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 6291 transitions. Word has length 36 [2021-07-13 19:58:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:37,752 INFO L482 AbstractCegarLoop]: Abstraction has 3191 states and 6291 transitions. [2021-07-13 19:58:37,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 6291 transitions. [2021-07-13 19:58:37,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:37,754 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:37,754 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:37,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:58:37,955 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:37,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1694909327, now seen corresponding path program 132 times [2021-07-13 19:58:37,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:37,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817786976] [2021-07-13 19:58:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:38,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:38,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817786976] [2021-07-13 19:58:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817786976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:38,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710708138] [2021-07-13 19:58:38,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:38,211 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:58:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:38,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:38,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:38,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:38,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:38,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:38,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:38,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:38,616 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:38,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:38,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710708138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:38,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:38,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 26 [2021-07-13 19:58:38,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399530680] [2021-07-13 19:58:38,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:38,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:38,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:38,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:38,624 INFO L87 Difference]: Start difference. First operand 3191 states and 6291 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:39,124 INFO L93 Difference]: Finished difference Result 4117 states and 8186 transitions. [2021-07-13 19:58:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:39,124 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:39,129 INFO L225 Difference]: With dead ends: 4117 [2021-07-13 19:58:39,129 INFO L226 Difference]: Without dead ends: 3907 [2021-07-13 19:58:39,129 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:39,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-07-13 19:58:39,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3290. [2021-07-13 19:58:39,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 1.9723320158102766) internal successors, (6487), 3289 states have internal predecessors, (6487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:39,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 6487 transitions. [2021-07-13 19:58:39,160 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 6487 transitions. Word has length 36 [2021-07-13 19:58:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:39,160 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 6487 transitions. [2021-07-13 19:58:39,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:39,160 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 6487 transitions. [2021-07-13 19:58:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:39,162 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:39,162 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:39,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:39,362 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:39,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:39,363 INFO L82 PathProgramCache]: Analyzing trace with hash 220937223, now seen corresponding path program 133 times [2021-07-13 19:58:39,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:39,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088047607] [2021-07-13 19:58:39,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:39,609 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:39,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:39,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088047607] [2021-07-13 19:58:39,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088047607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:39,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417267728] [2021-07-13 19:58:39,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:39,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:40,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:40,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:40,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:40,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:40,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:40,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:40,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:40,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:40,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417267728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:40,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:40,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-13 19:58:40,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402834213] [2021-07-13 19:58:40,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:58:40,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:40,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:58:40,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:58:40,042 INFO L87 Difference]: Start difference. First operand 3290 states and 6487 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:40,385 INFO L93 Difference]: Finished difference Result 4583 states and 9168 transitions. [2021-07-13 19:58:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:58:40,386 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:40,390 INFO L225 Difference]: With dead ends: 4583 [2021-07-13 19:58:40,390 INFO L226 Difference]: Without dead ends: 4530 [2021-07-13 19:58:40,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 568.8ms TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4530 states. [2021-07-13 19:58:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4530 to 3230. [2021-07-13 19:58:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 3229 states have (on average 1.9733663672963766) internal successors, (6372), 3229 states have internal predecessors, (6372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 6372 transitions. [2021-07-13 19:58:40,423 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 6372 transitions. Word has length 36 [2021-07-13 19:58:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:40,423 INFO L482 AbstractCegarLoop]: Abstraction has 3230 states and 6372 transitions. [2021-07-13 19:58:40,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 6372 transitions. [2021-07-13 19:58:40,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:40,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:40,435 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:40,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 19:58:40,635 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:40,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:40,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1675552753, now seen corresponding path program 134 times [2021-07-13 19:58:40,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:40,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112692486] [2021-07-13 19:58:40,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:40,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:40,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:40,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112692486] [2021-07-13 19:58:40,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112692486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:40,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464291357] [2021-07-13 19:58:40,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:58:40,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:40,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:40,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:40,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:41,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:41,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:41,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:41,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:41,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:41,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:41,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464291357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:41,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:41,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-13 19:58:41,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605087582] [2021-07-13 19:58:41,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:58:41,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:41,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:58:41,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:58:41,348 INFO L87 Difference]: Start difference. First operand 3230 states and 6372 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:41,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:41,845 INFO L93 Difference]: Finished difference Result 4673 states and 9315 transitions. [2021-07-13 19:58:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:58:41,845 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:41,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:41,850 INFO L225 Difference]: With dead ends: 4673 [2021-07-13 19:58:41,850 INFO L226 Difference]: Without dead ends: 4610 [2021-07-13 19:58:41,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 575.3ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:41,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4610 states. [2021-07-13 19:58:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4610 to 3248. [2021-07-13 19:58:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3248 states, 3247 states have (on average 1.9728980597474592) internal successors, (6406), 3247 states have internal predecessors, (6406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3248 states to 3248 states and 6406 transitions. [2021-07-13 19:58:41,882 INFO L78 Accepts]: Start accepts. Automaton has 3248 states and 6406 transitions. Word has length 36 [2021-07-13 19:58:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:41,882 INFO L482 AbstractCegarLoop]: Abstraction has 3248 states and 6406 transitions. [2021-07-13 19:58:41,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3248 states and 6406 transitions. [2021-07-13 19:58:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:41,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:41,885 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:42,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:42,085 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1297876917, now seen corresponding path program 135 times [2021-07-13 19:58:42,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:42,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475060847] [2021-07-13 19:58:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:42,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:42,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475060847] [2021-07-13 19:58:42,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475060847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:42,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446471035] [2021-07-13 19:58:42,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:42,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:58:42,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:42,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:42,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:42,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:42,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:42,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:42,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:42,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:42,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446471035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:42,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:42,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 19:58:42,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48515289] [2021-07-13 19:58:42,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:42,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:42,778 INFO L87 Difference]: Start difference. First operand 3248 states and 6406 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:43,123 INFO L93 Difference]: Finished difference Result 4370 states and 8737 transitions. [2021-07-13 19:58:43,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:43,123 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:43,127 INFO L225 Difference]: With dead ends: 4370 [2021-07-13 19:58:43,127 INFO L226 Difference]: Without dead ends: 4311 [2021-07-13 19:58:43,128 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 557.9ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-07-13 19:58:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3263. [2021-07-13 19:58:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-07-13 19:58:43,159 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-07-13 19:58:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:43,159 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-07-13 19:58:43,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-07-13 19:58:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:43,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:43,161 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:43,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:43,362 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:43,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:43,362 INFO L82 PathProgramCache]: Analyzing trace with hash -294936779, now seen corresponding path program 136 times [2021-07-13 19:58:43,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:43,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007711951] [2021-07-13 19:58:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:43,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:43,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007711951] [2021-07-13 19:58:43,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007711951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:43,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439361742] [2021-07-13 19:58:43,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:43,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:43,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:43,623 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:43,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:44,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:44,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:44,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:44,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:44,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:44,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:44,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:44,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439361742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:44,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:44,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 19:58:44,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405443429] [2021-07-13 19:58:44,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:44,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:44,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:44,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:44,077 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:44,439 INFO L93 Difference]: Finished difference Result 3962 states and 7874 transitions. [2021-07-13 19:58:44,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:44,439 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:44,444 INFO L225 Difference]: With dead ends: 3962 [2021-07-13 19:58:44,444 INFO L226 Difference]: Without dead ends: 3938 [2021-07-13 19:58:44,444 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:44,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-07-13 19:58:44,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3263. [2021-07-13 19:58:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:44,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-07-13 19:58:44,473 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-07-13 19:58:44,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:44,473 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-07-13 19:58:44,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-07-13 19:58:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:44,476 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:44,476 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:44,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:44,676 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:44,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:44,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1058906707, now seen corresponding path program 137 times [2021-07-13 19:58:44,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:44,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496316787] [2021-07-13 19:58:44,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:44,911 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:44,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:44,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496316787] [2021-07-13 19:58:44,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496316787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:44,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873274227] [2021-07-13 19:58:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:44,935 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:58:44,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:44,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 53 conjunts are in the unsatisfiable core [2021-07-13 19:58:44,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:45,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:45,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:45,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:45,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:45,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:45,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:45,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:45,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873274227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:45,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:45,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 19:58:45,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193884768] [2021-07-13 19:58:45,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:45,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:45,392 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:45,838 INFO L93 Difference]: Finished difference Result 3982 states and 7910 transitions. [2021-07-13 19:58:45,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:58:45,838 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:45,843 INFO L225 Difference]: With dead ends: 3982 [2021-07-13 19:58:45,843 INFO L226 Difference]: Without dead ends: 3948 [2021-07-13 19:58:45,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:58:45,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-07-13 19:58:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3263. [2021-07-13 19:58:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 1.9730226854690374) internal successors, (6436), 3262 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 6436 transitions. [2021-07-13 19:58:45,874 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 6436 transitions. Word has length 36 [2021-07-13 19:58:45,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:45,875 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 6436 transitions. [2021-07-13 19:58:45,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 6436 transitions. [2021-07-13 19:58:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:45,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:45,877 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:46,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:46,077 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:46,078 INFO L82 PathProgramCache]: Analyzing trace with hash -532135131, now seen corresponding path program 138 times [2021-07-13 19:58:46,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:46,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942634724] [2021-07-13 19:58:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:58:46,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942634724] [2021-07-13 19:58:46,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942634724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369131358] [2021-07-13 19:58:46,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:46,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:58:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:46,350 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:46,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:46,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:46,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:46,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:46,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:46,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:46,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:46,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369131358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:46,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:46,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 25 [2021-07-13 19:58:46,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262143177] [2021-07-13 19:58:46,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-13 19:58:46,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:46,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-13 19:58:46,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:58:46,753 INFO L87 Difference]: Start difference. First operand 3263 states and 6436 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:47,238 INFO L93 Difference]: Finished difference Result 4128 states and 8203 transitions. [2021-07-13 19:58:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:58:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:47,242 INFO L225 Difference]: With dead ends: 4128 [2021-07-13 19:58:47,242 INFO L226 Difference]: Without dead ends: 3903 [2021-07-13 19:58:47,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 736.2ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-07-13 19:58:47,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2021-07-13 19:58:47,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 3338. [2021-07-13 19:58:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3338 states, 3337 states have (on average 1.9733293377284986) internal successors, (6585), 3337 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:47,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3338 states to 3338 states and 6585 transitions. [2021-07-13 19:58:47,273 INFO L78 Accepts]: Start accepts. Automaton has 3338 states and 6585 transitions. Word has length 36 [2021-07-13 19:58:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:47,273 INFO L482 AbstractCegarLoop]: Abstraction has 3338 states and 6585 transitions. [2021-07-13 19:58:47,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3338 states and 6585 transitions. [2021-07-13 19:58:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:47,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:47,275 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:47,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:47,475 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:47,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2006107235, now seen corresponding path program 139 times [2021-07-13 19:58:47,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:47,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190188758] [2021-07-13 19:58:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:47,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190188758] [2021-07-13 19:58:47,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190188758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460510686] [2021-07-13 19:58:47,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:47,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:47,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:48,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:48,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:48,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:48,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:48,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:48,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:48,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:48,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460510686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:48,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:48,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-07-13 19:58:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620604472] [2021-07-13 19:58:48,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:48,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:48,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:48,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:48,128 INFO L87 Difference]: Start difference. First operand 3338 states and 6585 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:48,437 INFO L93 Difference]: Finished difference Result 4598 states and 9201 transitions. [2021-07-13 19:58:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:48,437 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:48,442 INFO L225 Difference]: With dead ends: 4598 [2021-07-13 19:58:48,442 INFO L226 Difference]: Without dead ends: 4545 [2021-07-13 19:58:48,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 539.3ms TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:48,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-07-13 19:58:48,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3326. [2021-07-13 19:58:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3326 states, 3325 states have (on average 1.973233082706767) internal successors, (6561), 3325 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:48,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3326 states to 3326 states and 6561 transitions. [2021-07-13 19:58:48,479 INFO L78 Accepts]: Start accepts. Automaton has 3326 states and 6561 transitions. Word has length 36 [2021-07-13 19:58:48,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:48,479 INFO L482 AbstractCegarLoop]: Abstraction has 3326 states and 6561 transitions. [2021-07-13 19:58:48,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:48,479 INFO L276 IsEmpty]: Start isEmpty. Operand 3326 states and 6561 transitions. [2021-07-13 19:58:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:48,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:48,481 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:48,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 19:58:48,682 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:48,682 INFO L82 PathProgramCache]: Analyzing trace with hash -551491705, now seen corresponding path program 140 times [2021-07-13 19:58:48,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:48,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450551940] [2021-07-13 19:58:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:48,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:48,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450551940] [2021-07-13 19:58:48,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450551940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:48,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118723002] [2021-07-13 19:58:48,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:48,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:58:48,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:48,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:48,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:49,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:49,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:49,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:49,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:49,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:49,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:49,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118723002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:49,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:49,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-07-13 19:58:49,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950440837] [2021-07-13 19:58:49,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:58:49,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:49,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:58:49,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:58:49,349 INFO L87 Difference]: Start difference. First operand 3326 states and 6561 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:49,650 INFO L93 Difference]: Finished difference Result 4391 states and 8752 transitions. [2021-07-13 19:58:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:49,650 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:49,654 INFO L225 Difference]: With dead ends: 4391 [2021-07-13 19:58:49,655 INFO L226 Difference]: Without dead ends: 4338 [2021-07-13 19:58:49,655 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-07-13 19:58:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3344. [2021-07-13 19:58:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.9736763386180078) internal successors, (6598), 3343 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 6598 transitions. [2021-07-13 19:58:49,687 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 6598 transitions. Word has length 36 [2021-07-13 19:58:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:49,687 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 6598 transitions. [2021-07-13 19:58:49,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 6598 transitions. [2021-07-13 19:58:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:49,689 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:49,689 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:49,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 19:58:49,890 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:49,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:49,890 INFO L82 PathProgramCache]: Analyzing trace with hash 300524031, now seen corresponding path program 141 times [2021-07-13 19:58:49,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:49,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840285202] [2021-07-13 19:58:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:50,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:50,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840285202] [2021-07-13 19:58:50,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840285202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:50,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890579477] [2021-07-13 19:58:50,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:50,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:58:50,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:50,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 52 conjunts are in the unsatisfiable core [2021-07-13 19:58:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:50,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:50,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:50,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:50,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:50,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 37 [2021-07-13 19:58:50,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:50,665 INFO L628 ElimStorePlain]: treesize reduction 5, result has 83.3 percent of original size [2021-07-13 19:58:50,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:50,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:10 [2021-07-13 19:58:50,674 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:50,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890579477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:50,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:50,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-07-13 19:58:50,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424261699] [2021-07-13 19:58:50,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:50,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:50,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:50,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:50,675 INFO L87 Difference]: Start difference. First operand 3344 states and 6598 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:51,619 INFO L93 Difference]: Finished difference Result 4634 states and 9234 transitions. [2021-07-13 19:58:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:58:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:51,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:51,624 INFO L225 Difference]: With dead ends: 4634 [2021-07-13 19:58:51,624 INFO L226 Difference]: Without dead ends: 4520 [2021-07-13 19:58:51,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1025.4ms TimeCoverageRelationStatistics Valid=154, Invalid=1568, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:58:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2021-07-13 19:58:51,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 3368. [2021-07-13 19:58:51,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 1.9747549747549749) internal successors, (6649), 3367 states have internal predecessors, (6649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 6649 transitions. [2021-07-13 19:58:51,657 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 6649 transitions. Word has length 36 [2021-07-13 19:58:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:51,658 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 6649 transitions. [2021-07-13 19:58:51,658 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) [2021-07-13 19:58:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 6649 transitions. [2021-07-13 19:58:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:51,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:51,660 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:51,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 19:58:51,861 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash 770045921, now seen corresponding path program 142 times [2021-07-13 19:58:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:51,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137494112] [2021-07-13 19:58:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:52,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137494112] [2021-07-13 19:58:52,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137494112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573552077] [2021-07-13 19:58:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:52,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:58:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:52,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:52,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:52,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:52,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:52,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:52,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:52,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:52,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:52,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573552077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:52,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:52,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-07-13 19:58:52,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754421156] [2021-07-13 19:58:52,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:58:52,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:52,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:58:52,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:58:52,563 INFO L87 Difference]: Start difference. First operand 3368 states and 6649 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:52,865 INFO L93 Difference]: Finished difference Result 4433 states and 8859 transitions. [2021-07-13 19:58:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:52,865 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:52,869 INFO L225 Difference]: With dead ends: 4433 [2021-07-13 19:58:52,870 INFO L226 Difference]: Without dead ends: 4374 [2021-07-13 19:58:52,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4374 states. [2021-07-13 19:58:52,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4374 to 3356. [2021-07-13 19:58:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:52,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-07-13 19:58:52,902 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-07-13 19:58:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:52,902 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-07-13 19:58:52,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-07-13 19:58:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:52,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:52,905 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:53,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:58:53,105 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:53,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:53,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1772986059, now seen corresponding path program 143 times [2021-07-13 19:58:53,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:53,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195383472] [2021-07-13 19:58:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:53,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:53,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195383472] [2021-07-13 19:58:53,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195383472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:53,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445902966] [2021-07-13 19:58:53,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:53,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:58:53,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:53,420 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:53,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:53,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:58:53,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:53,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:58:53,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:53,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:58:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:53,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445902966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:53,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:53,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2021-07-13 19:58:53,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979449760] [2021-07-13 19:58:53,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:58:53,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:53,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:58:53,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:58:53,823 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:58:54,264 INFO L93 Difference]: Finished difference Result 4113 states and 8183 transitions. [2021-07-13 19:58:54,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:58:54,264 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:58:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:58:54,269 INFO L225 Difference]: With dead ends: 4113 [2021-07-13 19:58:54,269 INFO L226 Difference]: Without dead ends: 4089 [2021-07-13 19:58:54,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 575.6ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:58:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-07-13 19:58:54,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3356. [2021-07-13 19:58:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 1.9746646795827123) internal successors, (6625), 3355 states have internal predecessors, (6625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 6625 transitions. [2021-07-13 19:58:54,300 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 6625 transitions. Word has length 36 [2021-07-13 19:58:54,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:58:54,300 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 6625 transitions. [2021-07-13 19:58:54,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:58:54,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 6625 transitions. [2021-07-13 19:58:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:58:54,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:58:54,303 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:58:54,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:54,503 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:58:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:58:54,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1009016131, now seen corresponding path program 144 times [2021-07-13 19:58:54,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:58:54,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972944558] [2021-07-13 19:58:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:58:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:58:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:54,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:58:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972944558] [2021-07-13 19:58:54,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972944558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982604153] [2021-07-13 19:58:54,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:58:54,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:58:54,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:58:54,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:58:54,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:58:55,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:55,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:58:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:58:55,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 37 [2021-07-13 19:58:55,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:58:55,968 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.3 percent of original size [2021-07-13 19:58:55,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:58:55,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:104, output treesize:10 [2021-07-13 19:58:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:58:55,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982604153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:58:55,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:58:55,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2021-07-13 19:58:55,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857615361] [2021-07-13 19:58:55,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 19:58:55,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:58:55,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 19:58:55,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:58:55,978 INFO L87 Difference]: Start difference. First operand 3356 states and 6625 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:00,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:00,583 INFO L93 Difference]: Finished difference Result 4097 states and 8147 transitions. [2021-07-13 19:59:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:59:00,583 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:59:00,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:00,588 INFO L225 Difference]: With dead ends: 4097 [2021-07-13 19:59:00,588 INFO L226 Difference]: Without dead ends: 4063 [2021-07-13 19:59:00,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2668.3ms TimeCoverageRelationStatistics Valid=153, Invalid=1487, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:59:00,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-07-13 19:59:00,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3353. [2021-07-13 19:59:00,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 1.974343675417661) internal successors, (6618), 3352 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 6618 transitions. [2021-07-13 19:59:00,621 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 6618 transitions. Word has length 36 [2021-07-13 19:59:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:00,621 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 6618 transitions. [2021-07-13 19:59:00,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 6618 transitions. [2021-07-13 19:59:00,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-07-13 19:59:00,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:00,624 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:00,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 19:59:00,824 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1533152851, now seen corresponding path program 145 times [2021-07-13 19:59:00,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:00,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644924453] [2021-07-13 19:59:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:01,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:01,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644924453] [2021-07-13 19:59:01,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644924453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519851787] [2021-07-13 19:59:01,086 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:01,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:59:01,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:01,431 INFO L354 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2021-07-13 19:59:01,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:59:01,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:01,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:01,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:01,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:10 [2021-07-13 19:59:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:01,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519851787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:01,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2021-07-13 19:59:01,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620484283] [2021-07-13 19:59:01,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 19:59:01,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:01,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 19:59:01,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:59:01,462 INFO L87 Difference]: Start difference. First operand 3353 states and 6618 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:01,715 INFO L93 Difference]: Finished difference Result 3920 states and 7778 transitions. [2021-07-13 19:59:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:59:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-07-13 19:59:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:01,719 INFO L225 Difference]: With dead ends: 3920 [2021-07-13 19:59:01,719 INFO L226 Difference]: Without dead ends: 3905 [2021-07-13 19:59:01,719 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:59:01,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3905 states. [2021-07-13 19:59:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3905 to 3360. [2021-07-13 19:59:01,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 1.9746948496576362) internal successors, (6633), 3359 states have internal predecessors, (6633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 6633 transitions. [2021-07-13 19:59:01,749 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 6633 transitions. Word has length 36 [2021-07-13 19:59:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:01,749 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 6633 transitions. [2021-07-13 19:59:01,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 6633 transitions. [2021-07-13 19:59:01,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-13 19:59:01,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:01,752 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:01,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:01,953 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:01,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:01,953 INFO L82 PathProgramCache]: Analyzing trace with hash 297908302, now seen corresponding path program 146 times [2021-07-13 19:59:01,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:01,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431533788] [2021-07-13 19:59:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:01,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:01,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431533788] [2021-07-13 19:59:01,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431533788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:01,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569821784] [2021-07-13 19:59:01,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:02,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:02,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:02,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:59:02,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:02,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569821784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:02,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:02,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-13 19:59:02,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605690979] [2021-07-13 19:59:02,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:59:02,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:02,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:59:02,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:59:02,054 INFO L87 Difference]: Start difference. First operand 3360 states and 6633 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:02,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:02,084 INFO L93 Difference]: Finished difference Result 3841 states and 7613 transitions. [2021-07-13 19:59:02,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:59:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-13 19:59:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:02,088 INFO L225 Difference]: With dead ends: 3841 [2021-07-13 19:59:02,088 INFO L226 Difference]: Without dead ends: 3830 [2021-07-13 19:59:02,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:59:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-07-13 19:59:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3470. [2021-07-13 19:59:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3470 states, 3469 states have (on average 1.9824156817526666) internal successors, (6877), 3469 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 6877 transitions. [2021-07-13 19:59:02,119 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 6877 transitions. Word has length 38 [2021-07-13 19:59:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:02,119 INFO L482 AbstractCegarLoop]: Abstraction has 3470 states and 6877 transitions. [2021-07-13 19:59:02,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 6877 transitions. [2021-07-13 19:59:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:59:02,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:02,122 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:02,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:02,322 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:02,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1224230535, now seen corresponding path program 147 times [2021-07-13 19:59:02,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:02,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986551243] [2021-07-13 19:59:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:02,547 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:02,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:02,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986551243] [2021-07-13 19:59:02,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986551243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:02,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090730670] [2021-07-13 19:59:02,547 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:02,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:59:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:02,573 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:59:02,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:02,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:02,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:02,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:59:02,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:02,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:02,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:02,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:59:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:02,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090730670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:02,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:02,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-13 19:59:02,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29937618] [2021-07-13 19:59:02,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:59:02,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:02,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:59:02,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:59:02,998 INFO L87 Difference]: Start difference. First operand 3470 states and 6877 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:03,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:03,643 INFO L93 Difference]: Finished difference Result 4514 states and 9036 transitions. [2021-07-13 19:59:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:59:03,644 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:59:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:03,649 INFO L225 Difference]: With dead ends: 4514 [2021-07-13 19:59:03,649 INFO L226 Difference]: Without dead ends: 4469 [2021-07-13 19:59:03,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 708.9ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:59:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-07-13 19:59:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3509. [2021-07-13 19:59:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-07-13 19:59:03,682 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-07-13 19:59:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:03,682 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-07-13 19:59:03,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-07-13 19:59:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:59:03,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:03,685 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:03,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,150 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:03,886 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:03,886 INFO L82 PathProgramCache]: Analyzing trace with hash 2076785471, now seen corresponding path program 148 times [2021-07-13 19:59:03,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:03,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180447964] [2021-07-13 19:59:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:04,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:04,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180447964] [2021-07-13 19:59:04,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180447964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:04,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815031911] [2021-07-13 19:59:04,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:04,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:04,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:04,128 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:59:04,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:04,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:04,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:04,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:04,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:59:04,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:04,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:04,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:04,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:59:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:04,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815031911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:04,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:04,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-13 19:59:04,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921369162] [2021-07-13 19:59:04,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:59:04,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:59:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:59:04,551 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:05,192 INFO L93 Difference]: Finished difference Result 4780 states and 9544 transitions. [2021-07-13 19:59:05,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:59:05,192 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:59:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:05,198 INFO L225 Difference]: With dead ends: 4780 [2021-07-13 19:59:05,198 INFO L226 Difference]: Without dead ends: 4735 [2021-07-13 19:59:05,198 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 738.7ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:59:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4735 states. [2021-07-13 19:59:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4735 to 3509. [2021-07-13 19:59:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3509 states, 3508 states have (on average 1.9817559863169898) internal successors, (6952), 3508 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 6952 transitions. [2021-07-13 19:59:05,233 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 6952 transitions. Word has length 39 [2021-07-13 19:59:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:05,233 INFO L482 AbstractCegarLoop]: Abstraction has 3509 states and 6952 transitions. [2021-07-13 19:59:05,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 6952 transitions. [2021-07-13 19:59:05,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:59:05,236 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:05,236 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:05,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:05,436 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash 101428265, now seen corresponding path program 149 times [2021-07-13 19:59:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:05,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805924506] [2021-07-13 19:59:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:05,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:05,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805924506] [2021-07-13 19:59:05,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805924506] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:05,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200931988] [2021-07-13 19:59:05,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:05,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:59:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:05,682 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:59:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:06,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:06,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:06,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:06,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:06,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:06,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2021-07-13 19:59:06,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:06,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:06,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:06,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:7 [2021-07-13 19:59:06,208 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:06,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200931988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:06,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:06,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-07-13 19:59:06,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878527081] [2021-07-13 19:59:06,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-07-13 19:59:06,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:06,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-07-13 19:59:06,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:59:06,209 INFO L87 Difference]: Start difference. First operand 3509 states and 6952 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:07,192 INFO L93 Difference]: Finished difference Result 4916 states and 9863 transitions. [2021-07-13 19:59:07,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:59:07,192 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:59:07,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:07,197 INFO L225 Difference]: With dead ends: 4916 [2021-07-13 19:59:07,197 INFO L226 Difference]: Without dead ends: 4871 [2021-07-13 19:59:07,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1088.1ms TimeCoverageRelationStatistics Valid=212, Invalid=1950, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:59:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-07-13 19:59:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 3533. [2021-07-13 19:59:07,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3533 states, 3532 states have (on average 1.9818799546998866) internal successors, (7000), 3532 states have internal predecessors, (7000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3533 states to 3533 states and 7000 transitions. [2021-07-13 19:59:07,230 INFO L78 Accepts]: Start accepts. Automaton has 3533 states and 7000 transitions. Word has length 39 [2021-07-13 19:59:07,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:07,230 INFO L482 AbstractCegarLoop]: Abstraction has 3533 states and 7000 transitions. [2021-07-13 19:59:07,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:07,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3533 states and 7000 transitions. [2021-07-13 19:59:07,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:59:07,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:07,233 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:07,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:07,434 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:07,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1574344523, now seen corresponding path program 150 times [2021-07-13 19:59:07,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:07,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295430569] [2021-07-13 19:59:07,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:07,671 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:07,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:07,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295430569] [2021-07-13 19:59:07,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295430569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:07,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040966590] [2021-07-13 19:59:07,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:07,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:59:07,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:07,705 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:59:07,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:08,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:08,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:08,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:59:08,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:08,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:08,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:08,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:59:08,126 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:08,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040966590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:08,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:08,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-13 19:59:08,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298056832] [2021-07-13 19:59:08,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:59:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:59:08,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:59:08,127 INFO L87 Difference]: Start difference. First operand 3533 states and 7000 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:08,695 INFO L93 Difference]: Finished difference Result 5103 states and 10179 transitions. [2021-07-13 19:59:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:59:08,695 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:59:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:08,700 INFO L225 Difference]: With dead ends: 5103 [2021-07-13 19:59:08,700 INFO L226 Difference]: Without dead ends: 4891 [2021-07-13 19:59:08,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:59:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-07-13 19:59:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3611. [2021-07-13 19:59:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 3610 states have (on average 1.9817174515235456) internal successors, (7154), 3610 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 7154 transitions. [2021-07-13 19:59:08,737 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 7154 transitions. Word has length 39 [2021-07-13 19:59:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:08,737 INFO L482 AbstractCegarLoop]: Abstraction has 3611 states and 7154 transitions. [2021-07-13 19:59:08,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 7154 transitions. [2021-07-13 19:59:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:59:08,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:08,740 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:08,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-07-13 19:59:08,940 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 935790731, now seen corresponding path program 151 times [2021-07-13 19:59:08,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:08,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385645465] [2021-07-13 19:59:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:09,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:09,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385645465] [2021-07-13 19:59:09,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385645465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:09,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108037406] [2021-07-13 19:59:09,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:09,179 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:59:09,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:09,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:09,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:09,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:09,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:59:09,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:09,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:09,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:09,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:59:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:09,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108037406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:09,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:09,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-13 19:59:09,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746889980] [2021-07-13 19:59:09,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:59:09,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:09,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:59:09,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:59:09,597 INFO L87 Difference]: Start difference. First operand 3611 states and 7154 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:10,336 INFO L93 Difference]: Finished difference Result 4917 states and 9849 transitions. [2021-07-13 19:59:10,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:59:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:59:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:10,342 INFO L225 Difference]: With dead ends: 4917 [2021-07-13 19:59:10,342 INFO L226 Difference]: Without dead ends: 4872 [2021-07-13 19:59:10,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 835.5ms TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:10,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-07-13 19:59:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3671. [2021-07-13 19:59:10,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3670 states have (on average 1.98283378746594) internal successors, (7277), 3670 states have internal predecessors, (7277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 7277 transitions. [2021-07-13 19:59:10,379 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 7277 transitions. Word has length 39 [2021-07-13 19:59:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:10,379 INFO L482 AbstractCegarLoop]: Abstraction has 3671 states and 7277 transitions. [2021-07-13 19:59:10,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 7277 transitions. [2021-07-13 19:59:10,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-07-13 19:59:10,382 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:10,383 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:10,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:10,583 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:10,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:10,583 INFO L82 PathProgramCache]: Analyzing trace with hash 616889269, now seen corresponding path program 152 times [2021-07-13 19:59:10,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:10,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912475666] [2021-07-13 19:59:10,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:10,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:10,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912475666] [2021-07-13 19:59:10,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912475666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:10,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906265544] [2021-07-13 19:59:10,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:10,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:10,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:10,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-13 19:59:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:11,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:11,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:11,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:11,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 37 [2021-07-13 19:59:11,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:11,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:11,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:11,243 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:95, output treesize:10 [2021-07-13 19:59:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:59:11,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906265544] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:11,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:11,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 27 [2021-07-13 19:59:11,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755493661] [2021-07-13 19:59:11,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-13 19:59:11,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:11,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-13 19:59:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:59:11,252 INFO L87 Difference]: Start difference. First operand 3671 states and 7277 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:11,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:11,975 INFO L93 Difference]: Finished difference Result 5037 states and 10091 transitions. [2021-07-13 19:59:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:59:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-07-13 19:59:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:11,981 INFO L225 Difference]: With dead ends: 5037 [2021-07-13 19:59:11,981 INFO L226 Difference]: Without dead ends: 4992 [2021-07-13 19:59:11,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 795.6ms TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:59:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-07-13 19:59:12,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 3698. [2021-07-13 19:59:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3698 states, 3697 states have (on average 1.9829591560724913) internal successors, (7331), 3697 states have internal predecessors, (7331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3698 states to 3698 states and 7331 transitions. [2021-07-13 19:59:12,018 INFO L78 Accepts]: Start accepts. Automaton has 3698 states and 7331 transitions. Word has length 39 [2021-07-13 19:59:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:12,018 INFO L482 AbstractCegarLoop]: Abstraction has 3698 states and 7331 transitions. [2021-07-13 19:59:12,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3698 states and 7331 transitions. [2021-07-13 19:59:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:12,021 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:12,021 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:12,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 19:59:12,222 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:12,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:12,222 INFO L82 PathProgramCache]: Analyzing trace with hash 490317244, now seen corresponding path program 153 times [2021-07-13 19:59:12,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:12,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139469560] [2021-07-13 19:59:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 74 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:59:12,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:12,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139469560] [2021-07-13 19:59:12,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139469560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:12,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856115441] [2021-07-13 19:59:12,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:12,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:59:12,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:12,525 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-13 19:59:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:13,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:13,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:13,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:13,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:13,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 44 [2021-07-13 19:59:13,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:13,596 INFO L628 ElimStorePlain]: treesize reduction 3, result has 90.9 percent of original size [2021-07-13 19:59:13,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:13,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:123, output treesize:12 [2021-07-13 19:59:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 4 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:13,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856115441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:13,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:13,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-07-13 19:59:13,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580194833] [2021-07-13 19:59:13,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 19:59:13,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:13,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 19:59:13,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:59:13,606 INFO L87 Difference]: Start difference. First operand 3698 states and 7331 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:15,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:15,108 INFO L93 Difference]: Finished difference Result 6069 states and 12152 transitions. [2021-07-13 19:59:15,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:59:15,109 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:15,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:15,116 INFO L225 Difference]: With dead ends: 6069 [2021-07-13 19:59:15,116 INFO L226 Difference]: Without dead ends: 6002 [2021-07-13 19:59:15,116 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1226.1ms TimeCoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2021-07-13 19:59:15,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 3716. [2021-07-13 19:59:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:15,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-07-13 19:59:15,158 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-07-13 19:59:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:15,158 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-07-13 19:59:15,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:15,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-07-13 19:59:15,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:15,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:15,161 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:15,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 19:59:15,362 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:15,362 INFO L82 PathProgramCache]: Analyzing trace with hash -543142796, now seen corresponding path program 154 times [2021-07-13 19:59:15,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:15,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245688180] [2021-07-13 19:59:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:15,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:15,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245688180] [2021-07-13 19:59:15,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245688180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:15,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044888987] [2021-07-13 19:59:15,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:15,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:15,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:15,670 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:16,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:16,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:16,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:16,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:16,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:16,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:16,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:16,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:16,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044888987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:16,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:16,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-07-13 19:59:16,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505391487] [2021-07-13 19:59:16,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 19:59:16,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:16,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 19:59:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:59:16,350 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:17,061 INFO L93 Difference]: Finished difference Result 6664 states and 13360 transitions. [2021-07-13 19:59:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:59:17,061 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:17,069 INFO L225 Difference]: With dead ends: 6664 [2021-07-13 19:59:17,069 INFO L226 Difference]: Without dead ends: 6597 [2021-07-13 19:59:17,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 924.9ms TimeCoverageRelationStatistics Valid=163, Invalid=1643, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:59:17,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6597 states. [2021-07-13 19:59:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6597 to 3716. [2021-07-13 19:59:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3716 states, 3715 states have (on average 1.9822341857335128) internal successors, (7364), 3715 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3716 states to 3716 states and 7364 transitions. [2021-07-13 19:59:17,119 INFO L78 Accepts]: Start accepts. Automaton has 3716 states and 7364 transitions. Word has length 41 [2021-07-13 19:59:17,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:17,119 INFO L482 AbstractCegarLoop]: Abstraction has 3716 states and 7364 transitions. [2021-07-13 19:59:17,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3716 states and 7364 transitions. [2021-07-13 19:59:17,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:17,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:17,123 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:17,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-07-13 19:59:17,323 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:17,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:17,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1543593212, now seen corresponding path program 155 times [2021-07-13 19:59:17,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:17,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292463135] [2021-07-13 19:59:17,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:17,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:17,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292463135] [2021-07-13 19:59:17,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292463135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:17,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567093004] [2021-07-13 19:59:17,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:17,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:59:17,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:17,649 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:17,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:18,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:18,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:18,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:18,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:18,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:18,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:18,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:18,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:18,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:18,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:18,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567093004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:18,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:18,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:18,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277886107] [2021-07-13 19:59:18,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:18,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:18,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:18,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1205, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:18,318 INFO L87 Difference]: Start difference. First operand 3716 states and 7364 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:18,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:18,991 INFO L93 Difference]: Finished difference Result 7025 states and 14072 transitions. [2021-07-13 19:59:18,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:59:18,991 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:18,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:18,999 INFO L225 Difference]: With dead ends: 7025 [2021-07-13 19:59:18,999 INFO L226 Difference]: Without dead ends: 6922 [2021-07-13 19:59:18,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 972.1ms TimeCoverageRelationStatistics Valid=173, Invalid=1807, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6922 states. [2021-07-13 19:59:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6922 to 3857. [2021-07-13 19:59:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 1.97899377593361) internal successors, (7631), 3856 states have internal predecessors, (7631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 7631 transitions. [2021-07-13 19:59:19,046 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 7631 transitions. Word has length 41 [2021-07-13 19:59:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:19,046 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 7631 transitions. [2021-07-13 19:59:19,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 7631 transitions. [2021-07-13 19:59:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:19,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:19,050 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:19,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,250 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:19,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:19,251 INFO L82 PathProgramCache]: Analyzing trace with hash -13013580, now seen corresponding path program 156 times [2021-07-13 19:59:19,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:19,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619053183] [2021-07-13 19:59:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:19,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:19,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619053183] [2021-07-13 19:59:19,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619053183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:19,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636947831] [2021-07-13 19:59:19,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:19,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 19:59:19,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:19,577 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:19,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:20,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:20,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:20,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:20,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:20,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:20,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:20,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:20,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:20,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:20,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 2 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:20,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636947831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:20,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:20,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:20,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090119315] [2021-07-13 19:59:20,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:20,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:20,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:20,273 INFO L87 Difference]: Start difference. First operand 3857 states and 7631 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:21,014 INFO L93 Difference]: Finished difference Result 5973 states and 11891 transitions. [2021-07-13 19:59:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:59:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:21,021 INFO L225 Difference]: With dead ends: 5973 [2021-07-13 19:59:21,021 INFO L226 Difference]: Without dead ends: 5944 [2021-07-13 19:59:21,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 972.4ms TimeCoverageRelationStatistics Valid=177, Invalid=1803, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-07-13 19:59:21,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 3896. [2021-07-13 19:59:21,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3895 states have (on average 1.9802310654685493) internal successors, (7713), 3895 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 7713 transitions. [2021-07-13 19:59:21,080 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 7713 transitions. Word has length 41 [2021-07-13 19:59:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:21,080 INFO L482 AbstractCegarLoop]: Abstraction has 3896 states and 7713 transitions. [2021-07-13 19:59:21,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 7713 transitions. [2021-07-13 19:59:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:21,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:21,083 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:21,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-13 19:59:21,284 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:21,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:21,284 INFO L82 PathProgramCache]: Analyzing trace with hash -862044258, now seen corresponding path program 157 times [2021-07-13 19:59:21,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:21,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904057706] [2021-07-13 19:59:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:21,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:21,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904057706] [2021-07-13 19:59:21,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904057706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:21,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129839813] [2021-07-13 19:59:21,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:21,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:22,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:22,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:22,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:22,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:22,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:22,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:22,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:22,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129839813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:22,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:22,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-07-13 19:59:22,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581214280] [2021-07-13 19:59:22,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 19:59:22,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 19:59:22,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:59:22,278 INFO L87 Difference]: Start difference. First operand 3896 states and 7713 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:23,011 INFO L93 Difference]: Finished difference Result 6364 states and 12786 transitions. [2021-07-13 19:59:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:59:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:23,018 INFO L225 Difference]: With dead ends: 6364 [2021-07-13 19:59:23,018 INFO L226 Difference]: Without dead ends: 6297 [2021-07-13 19:59:23,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 971.0ms TimeCoverageRelationStatistics Valid=166, Invalid=1726, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:59:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6297 states. [2021-07-13 19:59:23,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6297 to 3182. [2021-07-13 19:59:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 3181 states have (on average 1.994970135177617) internal successors, (6346), 3181 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 6346 transitions. [2021-07-13 19:59:23,058 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 6346 transitions. Word has length 41 [2021-07-13 19:59:23,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:23,058 INFO L482 AbstractCegarLoop]: Abstraction has 3182 states and 6346 transitions. [2021-07-13 19:59:23,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:23,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 6346 transitions. [2021-07-13 19:59:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:23,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:23,061 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:23,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:23,262 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:23,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1224691750, now seen corresponding path program 158 times [2021-07-13 19:59:23,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:23,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611320990] [2021-07-13 19:59:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:23,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:23,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611320990] [2021-07-13 19:59:23,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611320990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:23,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206550520] [2021-07-13 19:59:23,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:23,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:23,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:23,629 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:24,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:24,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:24,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:24,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:24,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:24,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:24,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:24,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:24,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:24,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:24,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:24,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206550520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:24,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:24,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:24,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594522650] [2021-07-13 19:59:24,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:24,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:24,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:24,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:24,324 INFO L87 Difference]: Start difference. First operand 3182 states and 6346 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:25,079 INFO L93 Difference]: Finished difference Result 5735 states and 11591 transitions. [2021-07-13 19:59:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:59:25,080 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:25,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:25,095 INFO L225 Difference]: With dead ends: 5735 [2021-07-13 19:59:25,095 INFO L226 Difference]: Without dead ends: 5632 [2021-07-13 19:59:25,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1044.6ms TimeCoverageRelationStatistics Valid=176, Invalid=1894, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:59:25,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5632 states. [2021-07-13 19:59:25,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5632 to 2936. [2021-07-13 19:59:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2936 states, 2935 states have (on average 2.005792163543441) internal successors, (5887), 2935 states have internal predecessors, (5887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2936 states to 2936 states and 5887 transitions. [2021-07-13 19:59:25,135 INFO L78 Accepts]: Start accepts. Automaton has 2936 states and 5887 transitions. Word has length 41 [2021-07-13 19:59:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:25,135 INFO L482 AbstractCegarLoop]: Abstraction has 2936 states and 5887 transitions. [2021-07-13 19:59:25,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2936 states and 5887 transitions. [2021-07-13 19:59:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:25,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:25,138 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:25,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:25,338 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash -331915042, now seen corresponding path program 159 times [2021-07-13 19:59:25,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:25,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667716911] [2021-07-13 19:59:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:25,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:25,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667716911] [2021-07-13 19:59:25,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667716911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:25,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335095993] [2021-07-13 19:59:25,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:25,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:59:25,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:25,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 62 conjunts are in the unsatisfiable core [2021-07-13 19:59:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:26,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:26,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:26,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:26,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 44 [2021-07-13 19:59:26,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:26,536 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-07-13 19:59:26,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:26,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:126, output treesize:12 [2021-07-13 19:59:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:26,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335095993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:26,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:26,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:26,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140651294] [2021-07-13 19:59:26,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:26,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:26,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:26,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:26,545 INFO L87 Difference]: Start difference. First operand 2936 states and 5887 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:28,856 INFO L93 Difference]: Finished difference Result 5251 states and 10563 transitions. [2021-07-13 19:59:28,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:59:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:28,862 INFO L225 Difference]: With dead ends: 5251 [2021-07-13 19:59:28,862 INFO L226 Difference]: Without dead ends: 5054 [2021-07-13 19:59:28,862 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 2126.3ms TimeCoverageRelationStatistics Valid=269, Invalid=3763, Unknown=0, NotChecked=0, Total=4032 [2021-07-13 19:59:28,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-07-13 19:59:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 3113. [2021-07-13 19:59:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 1.9983933161953729) internal successors, (6219), 3112 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 6219 transitions. [2021-07-13 19:59:28,896 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 6219 transitions. Word has length 41 [2021-07-13 19:59:28,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:28,896 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 6219 transitions. [2021-07-13 19:59:28,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:28,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 6219 transitions. [2021-07-13 19:59:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:28,899 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:28,899 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:29,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:29,101 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:29,101 INFO L82 PathProgramCache]: Analyzing trace with hash 199723986, now seen corresponding path program 160 times [2021-07-13 19:59:29,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:29,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813649335] [2021-07-13 19:59:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:29,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:29,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:29,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813649335] [2021-07-13 19:59:29,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813649335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:29,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879592733] [2021-07-13 19:59:29,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:29,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:29,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:29,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:30,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:30,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:30,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:30,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:30,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:30,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:30,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:30,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:30,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:30,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:30,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879592733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:30,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:30,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-07-13 19:59:30,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815865295] [2021-07-13 19:59:30,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 19:59:30,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:30,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 19:59:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:59:30,105 INFO L87 Difference]: Start difference. First operand 3113 states and 6219 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:30,784 INFO L93 Difference]: Finished difference Result 5901 states and 11893 transitions. [2021-07-13 19:59:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:59:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:30,790 INFO L225 Difference]: With dead ends: 5901 [2021-07-13 19:59:30,790 INFO L226 Difference]: Without dead ends: 5804 [2021-07-13 19:59:30,791 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 965.8ms TimeCoverageRelationStatistics Valid=170, Invalid=1722, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:59:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5804 states. [2021-07-13 19:59:30,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5804 to 3365. [2021-07-13 19:59:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 1.9913793103448276) internal successors, (6699), 3364 states have internal predecessors, (6699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 6699 transitions. [2021-07-13 19:59:30,829 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 6699 transitions. Word has length 41 [2021-07-13 19:59:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:30,829 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 6699 transitions. [2021-07-13 19:59:30,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:30,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 6699 transitions. [2021-07-13 19:59:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:30,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:30,832 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:31,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:31,033 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash -273135364, now seen corresponding path program 161 times [2021-07-13 19:59:31,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:31,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410442202] [2021-07-13 19:59:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:31,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:31,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410442202] [2021-07-13 19:59:31,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410442202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:31,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648866968] [2021-07-13 19:59:31,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:31,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:59:31,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:31,384 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:31,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:33,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:33,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:33,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:33,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:33,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 36 [2021-07-13 19:59:33,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:33,744 INFO L628 ElimStorePlain]: treesize reduction 5, result has 84.4 percent of original size [2021-07-13 19:59:33,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:33,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:99, output treesize:9 [2021-07-13 19:59:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:33,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648866968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:33,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:33,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 39 [2021-07-13 19:59:33,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695892686] [2021-07-13 19:59:33,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-07-13 19:59:33,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:33,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-07-13 19:59:33,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1424, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:59:33,768 INFO L87 Difference]: Start difference. First operand 3365 states and 6699 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:41,439 INFO L93 Difference]: Finished difference Result 6066 states and 12161 transitions. [2021-07-13 19:59:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:59:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:41,446 INFO L225 Difference]: With dead ends: 6066 [2021-07-13 19:59:41,446 INFO L226 Difference]: Without dead ends: 5834 [2021-07-13 19:59:41,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 5515.4ms TimeCoverageRelationStatistics Valid=242, Invalid=3063, Unknown=1, NotChecked=0, Total=3306 [2021-07-13 19:59:41,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2021-07-13 19:59:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 3467. [2021-07-13 19:59:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:41,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-07-13 19:59:41,488 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-07-13 19:59:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:41,488 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-07-13 19:59:41,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-07-13 19:59:41,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:41,491 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:41,491 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:41,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 19:59:41,692 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:41,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:41,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1829742156, now seen corresponding path program 162 times [2021-07-13 19:59:41,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:41,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692794003] [2021-07-13 19:59:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:42,005 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:42,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:42,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692794003] [2021-07-13 19:59:42,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692794003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:42,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56395055] [2021-07-13 19:59:42,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:42,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:59:42,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:42,031 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:42,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:42,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:42,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:42,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:42,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:42,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:42,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:42,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:42,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:42,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:42,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56395055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:42,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:42,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855316132] [2021-07-13 19:59:42,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:42,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:42,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:42,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:42,763 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:43,565 INFO L93 Difference]: Finished difference Result 5352 states and 10712 transitions. [2021-07-13 19:59:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:59:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:43,570 INFO L225 Difference]: With dead ends: 5352 [2021-07-13 19:59:43,570 INFO L226 Difference]: Without dead ends: 5323 [2021-07-13 19:59:43,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1042.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2021-07-13 19:59:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 3467. [2021-07-13 19:59:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3467 states, 3466 states have (on average 1.9899019042123485) internal successors, (6897), 3466 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:43,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3467 states to 3467 states and 6897 transitions. [2021-07-13 19:59:43,607 INFO L78 Accepts]: Start accepts. Automaton has 3467 states and 6897 transitions. Word has length 41 [2021-07-13 19:59:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:43,607 INFO L482 AbstractCegarLoop]: Abstraction has 3467 states and 6897 transitions. [2021-07-13 19:59:43,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3467 states and 6897 transitions. [2021-07-13 19:59:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:43,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:43,610 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:43,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 19:59:43,810 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:43,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash -981044130, now seen corresponding path program 163 times [2021-07-13 19:59:43,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:43,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180244891] [2021-07-13 19:59:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:43,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:44,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:44,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180244891] [2021-07-13 19:59:44,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180244891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:44,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545393576] [2021-07-13 19:59:44,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:44,150 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:44,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:44,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:44,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:44,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:44,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:44,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:44,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:44,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:44,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:44,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545393576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:44,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:44,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:44,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299237526] [2021-07-13 19:59:44,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:44,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:44,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:44,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:44,881 INFO L87 Difference]: Start difference. First operand 3467 states and 6897 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:45,654 INFO L93 Difference]: Finished difference Result 5320 states and 10648 transitions. [2021-07-13 19:59:45,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:59:45,654 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:45,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:45,660 INFO L225 Difference]: With dead ends: 5320 [2021-07-13 19:59:45,660 INFO L226 Difference]: Without dead ends: 5289 [2021-07-13 19:59:45,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1035.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2021-07-13 19:59:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 3506. [2021-07-13 19:59:45,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.9905848787446505) internal successors, (6977), 3505 states have internal predecessors, (6977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 6977 transitions. [2021-07-13 19:59:45,704 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 6977 transitions. Word has length 41 [2021-07-13 19:59:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:45,704 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 6977 transitions. [2021-07-13 19:59:45,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 6977 transitions. [2021-07-13 19:59:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:45,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:45,708 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:45,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:45,908 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:45,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1879697322, now seen corresponding path program 164 times [2021-07-13 19:59:45,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:45,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399781359] [2021-07-13 19:59:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:46,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399781359] [2021-07-13 19:59:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399781359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:46,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212388598] [2021-07-13 19:59:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:46,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:46,238 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:46,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:46,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:46,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:46,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:46,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:46,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:46,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:46,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:46,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:46,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:46,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:46,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212388598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:46,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:46,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2021-07-13 19:59:46,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198639480] [2021-07-13 19:59:46,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-07-13 19:59:46,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:46,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-07-13 19:59:46,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:59:46,928 INFO L87 Difference]: Start difference. First operand 3506 states and 6977 transitions. Second operand has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:47,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:47,692 INFO L93 Difference]: Finished difference Result 6035 states and 12259 transitions. [2021-07-13 19:59:47,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:59:47,692 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:47,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:47,699 INFO L225 Difference]: With dead ends: 6035 [2021-07-13 19:59:47,699 INFO L226 Difference]: Without dead ends: 5929 [2021-07-13 19:59:47,699 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 984.2ms TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5929 states. [2021-07-13 19:59:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5929 to 3122. [2021-07-13 19:59:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3122 states, 3121 states have (on average 1.993912207625761) internal successors, (6223), 3121 states have internal predecessors, (6223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 6223 transitions. [2021-07-13 19:59:47,747 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 6223 transitions. Word has length 41 [2021-07-13 19:59:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:47,747 INFO L482 AbstractCegarLoop]: Abstraction has 3122 states and 6223 transitions. [2021-07-13 19:59:47,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 6223 transitions. [2021-07-13 19:59:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:47,750 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:47,750 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:47,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 19:59:47,951 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:47,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:47,951 INFO L82 PathProgramCache]: Analyzing trace with hash 207038686, now seen corresponding path program 165 times [2021-07-13 19:59:47,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:47,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240371308] [2021-07-13 19:59:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:48,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:48,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240371308] [2021-07-13 19:59:48,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240371308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:48,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524571054] [2021-07-13 19:59:48,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:48,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:59:48,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:48,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:48,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:48,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:48,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:48,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:48,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:48,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:48,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:48,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:48,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:48,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524571054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:48,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:48,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:48,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440028871] [2021-07-13 19:59:48,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:48,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:48,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:48,992 INFO L87 Difference]: Start difference. First operand 3122 states and 6223 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:49,646 INFO L93 Difference]: Finished difference Result 5436 states and 11008 transitions. [2021-07-13 19:59:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:49,646 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:49,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:49,652 INFO L225 Difference]: With dead ends: 5436 [2021-07-13 19:59:49,652 INFO L226 Difference]: Without dead ends: 5333 [2021-07-13 19:59:49,652 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1057.5ms TimeCoverageRelationStatistics Valid=184, Invalid=1978, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:59:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5333 states. [2021-07-13 19:59:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5333 to 2879. [2021-07-13 19:59:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-07-13 19:59:49,690 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-07-13 19:59:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:49,690 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-07-13 19:59:49,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-07-13 19:59:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:49,693 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:49,693 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:49,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:49,893 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:49,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1349568106, now seen corresponding path program 166 times [2021-07-13 19:59:49,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:49,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437326818] [2021-07-13 19:59:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:50,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:50,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437326818] [2021-07-13 19:59:50,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437326818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:50,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828437712] [2021-07-13 19:59:50,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:50,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:59:50,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:50,250 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:50,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:50,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:50,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:50,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:50,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:50,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:50,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:50,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:50,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:50,961 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:50,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828437712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:50,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:50,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:50,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942297984] [2021-07-13 19:59:50,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:50,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:50,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:50,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:50,962 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:51,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:51,802 INFO L93 Difference]: Finished difference Result 4690 states and 9451 transitions. [2021-07-13 19:59:51,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:59:51,802 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:51,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:51,808 INFO L225 Difference]: With dead ends: 4690 [2021-07-13 19:59:51,808 INFO L226 Difference]: Without dead ends: 4661 [2021-07-13 19:59:51,808 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1074.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1974, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:59:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-07-13 19:59:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 2879. [2021-07-13 19:59:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 2.0027797081306464) internal successors, (5764), 2878 states have internal predecessors, (5764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 5764 transitions. [2021-07-13 19:59:51,839 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 5764 transitions. Word has length 41 [2021-07-13 19:59:51,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:51,839 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 5764 transitions. [2021-07-13 19:59:51,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:51,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 5764 transitions. [2021-07-13 19:59:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:51,842 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:51,842 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:52,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-13 19:59:52,042 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:52,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:52,042 INFO L82 PathProgramCache]: Analyzing trace with hash 301499944, now seen corresponding path program 167 times [2021-07-13 19:59:52,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:52,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412545115] [2021-07-13 19:59:52,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:52,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:52,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412545115] [2021-07-13 19:59:52,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412545115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:52,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113738848] [2021-07-13 19:59:52,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:52,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:59:52,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:52,414 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:52,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:53,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:53,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:53,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:53,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:53,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:53,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 36 [2021-07-13 19:59:53,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:53,179 INFO L628 ElimStorePlain]: treesize reduction 5, result has 82.8 percent of original size [2021-07-13 19:59:53,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:53,181 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:98, output treesize:9 [2021-07-13 19:59:53,202 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:53,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113738848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:53,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:53,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2021-07-13 19:59:53,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786359915] [2021-07-13 19:59:53,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-07-13 19:59:53,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:53,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-07-13 19:59:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:59:53,203 INFO L87 Difference]: Start difference. First operand 2879 states and 5764 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:54,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:54,239 INFO L93 Difference]: Finished difference Result 5671 states and 11398 transitions. [2021-07-13 19:59:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:59:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:54,246 INFO L225 Difference]: With dead ends: 5671 [2021-07-13 19:59:54,246 INFO L226 Difference]: Without dead ends: 5413 [2021-07-13 19:59:54,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1249.5ms TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 19:59:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5413 states. [2021-07-13 19:59:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5413 to 3262. [2021-07-13 19:59:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 1.9908003679852806) internal successors, (6492), 3261 states have internal predecessors, (6492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 6492 transitions. [2021-07-13 19:59:54,285 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 6492 transitions. Word has length 41 [2021-07-13 19:59:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:54,285 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 6492 transitions. [2021-07-13 19:59:54,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 6492 transitions. [2021-07-13 19:59:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:54,288 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:54,288 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:54,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:54,488 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:54,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:54,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1290788428, now seen corresponding path program 168 times [2021-07-13 19:59:54,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:54,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198187517] [2021-07-13 19:59:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:54,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:54,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198187517] [2021-07-13 19:59:54,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198187517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:54,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832267666] [2021-07-13 19:59:54,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:54,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:59:54,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:54,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:54,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:55,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:55,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:55,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:55,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:55,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:55,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:55,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:55,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:55,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:55,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:55,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832267666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:55,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:55,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:55,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770679836] [2021-07-13 19:59:55,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:55,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:55,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:55,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:55,555 INFO L87 Difference]: Start difference. First operand 3262 states and 6492 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:56,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:56,395 INFO L93 Difference]: Finished difference Result 6007 states and 12122 transitions. [2021-07-13 19:59:56,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 19:59:56,396 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:56,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:56,401 INFO L225 Difference]: With dead ends: 6007 [2021-07-13 19:59:56,401 INFO L226 Difference]: Without dead ends: 5784 [2021-07-13 19:59:56,402 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1090.5ms TimeCoverageRelationStatistics Valid=183, Invalid=1979, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:59:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5784 states. [2021-07-13 19:59:56,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5784 to 2866. [2021-07-13 19:59:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 1.9720767888307156) internal successors, (5650), 2865 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:56,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 5650 transitions. [2021-07-13 19:59:56,434 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 5650 transitions. Word has length 41 [2021-07-13 19:59:56,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:56,434 INFO L482 AbstractCegarLoop]: Abstraction has 2866 states and 5650 transitions. [2021-07-13 19:59:56,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:56,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 5650 transitions. [2021-07-13 19:59:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:56,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:56,437 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:56,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:56,637 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:56,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1447572076, now seen corresponding path program 169 times [2021-07-13 19:59:56,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:56,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226291154] [2021-07-13 19:59:56,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:56,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:56,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226291154] [2021-07-13 19:59:56,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226291154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:56,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821784036] [2021-07-13 19:59:56,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:56,988 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:56,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:57,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:57,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:57,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:57,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:57,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:57,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:57,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:57,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:57,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:57,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821784036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:57,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:57,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:57,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768732469] [2021-07-13 19:59:57,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:57,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:57,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:57,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:57,696 INFO L87 Difference]: Start difference. First operand 2866 states and 5650 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:59:58,523 INFO L93 Difference]: Finished difference Result 4555 states and 9072 transitions. [2021-07-13 19:59:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:59:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 19:59:58,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:59:58,529 INFO L225 Difference]: With dead ends: 4555 [2021-07-13 19:59:58,529 INFO L226 Difference]: Without dead ends: 4532 [2021-07-13 19:59:58,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1039.3ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:59:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2021-07-13 19:59:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 2872. [2021-07-13 19:59:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-07-13 19:59:58,561 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-07-13 19:59:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:59:58,561 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-07-13 19:59:58,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:59:58,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-07-13 19:59:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 19:59:58,563 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:59:58,564 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:59:58,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:58,764 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:59:58,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:59:58,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1998697194, now seen corresponding path program 170 times [2021-07-13 19:59:58,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:59:58,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411712051] [2021-07-13 19:59:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:59:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:59:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:59,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:59:59,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411712051] [2021-07-13 19:59:59,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411712051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:59,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201941505] [2021-07-13 19:59:59,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:59:59,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:59:59,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:59:59,117 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 61 conjunts are in the unsatisfiable core [2021-07-13 19:59:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:59:59,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:59,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:59,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:59,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 19:59:59,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 19:59:59,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 44 [2021-07-13 19:59:59,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:59:59,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:59:59,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:59:59,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:114, output treesize:12 [2021-07-13 19:59:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:59:59,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201941505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:59:59,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:59:59,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-07-13 19:59:59,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331959148] [2021-07-13 19:59:59,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-07-13 19:59:59,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:59:59,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-07-13 19:59:59,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:59:59,852 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 20:00:00,577 INFO L93 Difference]: Finished difference Result 4567 states and 9099 transitions. [2021-07-13 20:00:00,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 20:00:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-13 20:00:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 20:00:00,586 INFO L225 Difference]: With dead ends: 4567 [2021-07-13 20:00:00,587 INFO L226 Difference]: Without dead ends: 4543 [2021-07-13 20:00:00,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1054.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1805, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 20:00:00,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2021-07-13 20:00:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 2872. [2021-07-13 20:00:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2872 states, 2871 states have (on average 1.9721351445489377) internal successors, (5662), 2871 states have internal predecessors, (5662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2872 states to 2872 states and 5662 transitions. [2021-07-13 20:00:00,640 INFO L78 Accepts]: Start accepts. Automaton has 2872 states and 5662 transitions. Word has length 41 [2021-07-13 20:00:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 20:00:00,640 INFO L482 AbstractCegarLoop]: Abstraction has 2872 states and 5662 transitions. [2021-07-13 20:00:00,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 36 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:00:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2872 states and 5662 transitions. [2021-07-13 20:00:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-13 20:00:00,642 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 20:00:00,642 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 20:00:00,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:00,843 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 20:00:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 20:00:00,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1053452280, now seen corresponding path program 171 times [2021-07-13 20:00:00,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 20:00:00,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712285231] [2021-07-13 20:00:00,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 20:00:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 20:00:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 1 proven. 75 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 20:00:01,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 20:00:01,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712285231] [2021-07-13 20:00:01,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712285231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:01,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130228580] [2021-07-13 20:00:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:00:01,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 20:00:01,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 20:00:01,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 60 conjunts are in the unsatisfiable core [2021-07-13 20:00:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 20:00:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:00:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:00:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:00:48,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:00:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-13 20:00:48,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-13 20:00:48,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 15 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 44 [2021-07-13 20:00:48,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 20:00:48,941 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.0 percent of original size [2021-07-13 20:00:48,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 20:00:48,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:130, output treesize:12 [2021-07-13 20:00:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 20:00:48,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130228580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 20:00:48,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 20:00:48,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-07-13 20:00:48,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542598973] [2021-07-13 20:00:48,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-13 20:00:48,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 20:00:48,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-13 20:00:48,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1075, Unknown=17, NotChecked=0, Total=1190 [2021-07-13 20:00:48,952 INFO L87 Difference]: Start difference. First operand 2872 states and 5662 transitions. Second operand has 35 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 20:02:27,952 WARN L227 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2021-07-13 20:02:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 20:02:28,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 20:02:28,154 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:281) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:847) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:761) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:474) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:293) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1461) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:654) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:419) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:238) ... 48 more [2021-07-13 20:02:28,158 INFO L168 Benchmark]: Toolchain (without parser) took 391683.71 ms. Allocated memory was 205.5 MB in the beginning and 587.2 MB in the end (delta: 381.7 MB). Free memory was 185.2 MB in the beginning and 521.9 MB in the end (delta: -336.6 MB). Peak memory consumption was 46.6 MB. Max. memory is 8.0 GB. [2021-07-13 20:02:28,158 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 205.5 MB. Free memory is still 186.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 20:02:28,159 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.23 ms. Allocated memory is still 205.5 MB. Free memory was 185.1 MB in the beginning and 183.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:02:28,159 INFO L168 Benchmark]: Boogie Preprocessor took 11.84 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 182.8 MB in the end (delta: 924.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 20:02:28,159 INFO L168 Benchmark]: RCFGBuilder took 172.47 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 170.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 20:02:28,159 INFO L168 Benchmark]: TraceAbstraction took 391473.89 ms. Allocated memory was 205.5 MB in the beginning and 587.2 MB in the end (delta: 381.7 MB). Free memory was 170.1 MB in the beginning and 521.9 MB in the end (delta: -351.8 MB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. [2021-07-13 20:02:28,159 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 205.5 MB. Free memory is still 186.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 17.23 ms. Allocated memory is still 205.5 MB. Free memory was 185.1 MB in the beginning and 183.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.84 ms. Allocated memory is still 205.5 MB. Free memory was 183.7 MB in the beginning and 182.8 MB in the end (delta: 924.1 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 172.47 ms. Allocated memory is still 205.5 MB. Free memory was 182.7 MB in the beginning and 170.6 MB in the end (delta: 12.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 391473.89 ms. Allocated memory was 205.5 MB in the beginning and 587.2 MB in the end (delta: 381.7 MB). Free memory was 170.1 MB in the beginning and 521.9 MB in the end (delta: -351.8 MB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...