/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/bench/exp1x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:25:27,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:25:27,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:25:27,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:25:27,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 19:25:27,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 19:25:27,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 19:25:27,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 19:25:27,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 19:25:27,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 19:25:27,603 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 19:25:27,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 19:25:27,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 19:25:27,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 19:25:27,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 19:25:27,612 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 19:25:27,617 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 19:25:27,627 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 19:25:27,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:25:27,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:25:27,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:25:27,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:25:27,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:25:27,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:25:27,657 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:25:27,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:25:27,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:25:27,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:25:27,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:25:27,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:25:27,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:25:27,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:25:27,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:25:27,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:25:27,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:25:27,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:25:27,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:25:27,660 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:25:27,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:25:27,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:25:27,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:25:27,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:25:27,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:25:27,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:25:27,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:25:27,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:25:27,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:25:27,661 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:25:27,661 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:25:27,661 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:25:27,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:25:27,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:25:27,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:25:27,972 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:25:27,973 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:25:27,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl [2021-07-13 19:25:27,973 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl' [2021-07-13 19:25:28,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:25:28,064 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:25:28,065 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:25:28,065 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:25:28,065 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:25:28,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,088 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:25:28,089 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:25:28,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:25:28,090 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:25:28,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,096 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/1) ... [2021-07-13 19:25:28,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:25:28,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:25:28,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:25:28,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:25:28,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (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 19:25:28,175 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:25:28,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:25:28,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:25:28,175 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:25:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:25:28,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:25:28,176 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:25:28,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:25:28,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:25:28,177 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 19:25:28,278 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:25:28,279 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:25:28,280 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:25:28 BoogieIcfgContainer [2021-07-13 19:25:28,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:25:28,281 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:25:28,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:25:28,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:25:28,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:25:28" (1/2) ... [2021-07-13 19:25:28,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf2a50e and model type exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:25:28, skipping insertion in model container [2021-07-13 19:25:28,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:25:28" (2/2) ... [2021-07-13 19:25:28,285 INFO L111 eAbstractionObserver]: Analyzing ICFG exp1x3.wvr.bpl [2021-07-13 19:25:28,288 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:25:28,288 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:25:28,288 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:25:28,289 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:25:28,308 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:25:28,338 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:25:28,374 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:25:28,374 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:25:28,374 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:25:28,374 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:25:28,374 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:25:28,375 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:25:28,375 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:25:28,375 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:25:28,380 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-07-13 19:25:28,401 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) 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 19:25:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) 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 19:25:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:25:28,407 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:28,407 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:28,408 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:28,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:28,413 INFO L82 PathProgramCache]: Analyzing trace with hash -64585232, now seen corresponding path program 1 times [2021-07-13 19:25:28,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:28,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987831467] [2021-07-13 19:25:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:28,530 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 19:25:28,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:28,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987831467] [2021-07-13 19:25:28,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987831467] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:25:28,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:25:28,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:25:28,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151142194] [2021-07-13 19:25:28,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:25:28,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:28,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:25:28,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:25:28,549 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) 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) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 19:25:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:28,592 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-07-13 19:25:28,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:25:28,594 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 19:25:28,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:28,618 INFO L225 Difference]: With dead ends: 54 [2021-07-13 19:25:28,618 INFO L226 Difference]: Without dead ends: 47 [2021-07-13 19:25:28,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:25:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-13 19:25:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-07-13 19:25:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:28,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-07-13 19:25:28,650 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-07-13 19:25:28,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:28,651 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-07-13 19:25:28,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 19:25:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-07-13 19:25:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:25:28,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:28,653 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:28,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:25:28,653 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:28,658 INFO L82 PathProgramCache]: Analyzing trace with hash 732040690, now seen corresponding path program 1 times [2021-07-13 19:25:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:28,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14773828] [2021-07-13 19:25:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:28,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:28,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14773828] [2021-07-13 19:25:28,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14773828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:28,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025263343] [2021-07-13 19:25:28,741 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 19:25:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:28,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-07-13 19:25:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:28,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025263343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:28,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:28,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-07-13 19:25:28,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784719648] [2021-07-13 19:25:28,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:25:28,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:28,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:25:28,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:25:28,862 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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 19:25:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:28,919 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-07-13 19:25:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:25:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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 13 [2021-07-13 19:25:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:28,922 INFO L225 Difference]: With dead ends: 68 [2021-07-13 19:25:28,922 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 19:25:28,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:25:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 19:25:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-07-13 19:25:28,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) 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 19:25:28,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-07-13 19:25:28,934 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-07-13 19:25:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:28,935 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-07-13 19:25:28,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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 19:25:28,935 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-07-13 19:25:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:25:28,936 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:28,937 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:29,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:25:29,153 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:29,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845998, now seen corresponding path program 1 times [2021-07-13 19:25:29,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:29,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861482748] [2021-07-13 19:25:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:29,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:29,179 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 19:25:29,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:29,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861482748] [2021-07-13 19:25:29,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861482748] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:25:29,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:25:29,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:25:29,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612576895] [2021-07-13 19:25:29,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:25:29,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:29,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:25:29,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:25:29,186 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 19:25:29,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:29,209 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2021-07-13 19:25:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:25:29,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 19:25:29,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:29,213 INFO L225 Difference]: With dead ends: 47 [2021-07-13 19:25:29,216 INFO L226 Difference]: Without dead ends: 40 [2021-07-13 19:25:29,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:25:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-07-13 19:25:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-07-13 19:25:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 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 19:25:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 69 transitions. [2021-07-13 19:25:29,224 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 69 transitions. Word has length 13 [2021-07-13 19:25:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:29,225 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 69 transitions. [2021-07-13 19:25:29,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 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 19:25:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 69 transitions. [2021-07-13 19:25:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:25:29,225 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:29,225 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:29,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:25:29,225 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:29,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1306103410, now seen corresponding path program 2 times [2021-07-13 19:25:29,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:29,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333753819] [2021-07-13 19:25:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:29,258 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 19:25:29,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:29,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333753819] [2021-07-13 19:25:29,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333753819] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:25:29,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:25:29,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:25:29,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440604548] [2021-07-13 19:25:29,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:25:29,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:29,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:25:29,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:25:29,262 INFO L87 Difference]: Start difference. First operand 37 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 19:25:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:29,288 INFO L93 Difference]: Finished difference Result 44 states and 83 transitions. [2021-07-13 19:25:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:25:29,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 19:25:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:29,290 INFO L225 Difference]: With dead ends: 44 [2021-07-13 19:25:29,290 INFO L226 Difference]: Without dead ends: 44 [2021-07-13 19:25:29,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:25:29,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-07-13 19:25:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-07-13 19:25:29,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) 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 19:25:29,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-07-13 19:25:29,297 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-07-13 19:25:29,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:29,298 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-07-13 19:25:29,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 19:25:29,298 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-07-13 19:25:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:25:29,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:29,299 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:29,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:25:29,299 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788944, now seen corresponding path program 1 times [2021-07-13 19:25:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:29,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663138124] [2021-07-13 19:25:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:29,389 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 19:25:29,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:29,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663138124] [2021-07-13 19:25:29,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663138124] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:29,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040575348] [2021-07-13 19:25:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:25:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:29,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:29,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:29,522 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 19:25:29,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040575348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:29,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:29,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-07-13 19:25:29,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472624877] [2021-07-13 19:25:29,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:25:29,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:29,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:25:29,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:25:29,523 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:29,565 INFO L93 Difference]: Finished difference Result 97 states and 185 transitions. [2021-07-13 19:25:29,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:25:29,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:25:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:29,567 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:25:29,567 INFO L226 Difference]: Without dead ends: 90 [2021-07-13 19:25:29,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:25:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-07-13 19:25:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-07-13 19:25:29,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-07-13 19:25:29,572 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 15 [2021-07-13 19:25:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:29,573 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-07-13 19:25:29,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-07-13 19:25:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:25:29,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:29,573 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:29,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:29,774 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356592, now seen corresponding path program 2 times [2021-07-13 19:25:29,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:29,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387158613] [2021-07-13 19:25:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:29,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:29,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387158613] [2021-07-13 19:25:29,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387158613] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:25:29,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:25:29,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:25:29,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413244493] [2021-07-13 19:25:29,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 19:25:29,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:29,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 19:25:29,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:25:29,812 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:29,839 INFO L93 Difference]: Finished difference Result 115 states and 230 transitions. [2021-07-13 19:25:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:25:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:25:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:29,840 INFO L225 Difference]: With dead ends: 115 [2021-07-13 19:25:29,840 INFO L226 Difference]: Without dead ends: 108 [2021-07-13 19:25:29,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 19:25:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-07-13 19:25:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-07-13 19:25:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2021-07-13 19:25:29,845 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 15 [2021-07-13 19:25:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:29,845 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2021-07-13 19:25:29,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2021-07-13 19:25:29,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:29,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:29,846 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:29,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:25:29,846 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:29,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:29,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1128288690, now seen corresponding path program 3 times [2021-07-13 19:25:29,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:29,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133394062] [2021-07-13 19:25:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:29,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:29,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133394062] [2021-07-13 19:25:29,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133394062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:29,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041454182] [2021-07-13 19:25:29,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:25:29,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:25:29,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:29,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:29,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:30,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041454182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:30,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:30,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:30,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867589580] [2021-07-13 19:25:30,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:30,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:30,022 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 19:25:30,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:30,289 INFO L93 Difference]: Finished difference Result 164 states and 313 transitions. [2021-07-13 19:25:30,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:30,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 17 [2021-07-13 19:25:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:30,290 INFO L225 Difference]: With dead ends: 164 [2021-07-13 19:25:30,290 INFO L226 Difference]: Without dead ends: 164 [2021-07-13 19:25:30,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-07-13 19:25:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2021-07-13 19:25:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-07-13 19:25:30,295 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 17 [2021-07-13 19:25:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:30,295 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-07-13 19:25:30,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 19:25:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-07-13 19:25:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:30,295 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:30,295 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:30,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:30,509 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:30,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643090, now seen corresponding path program 4 times [2021-07-13 19:25:30,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:30,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628592878] [2021-07-13 19:25:30,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:30,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:30,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628592878] [2021-07-13 19:25:30,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628592878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:30,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049640963] [2021-07-13 19:25:30,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:30,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:30,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:30,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049640963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:30,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:30,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:30,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040836589] [2021-07-13 19:25:30,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:30,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:30,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:30,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:30,629 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 19:25:30,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:30,759 INFO L93 Difference]: Finished difference Result 167 states and 311 transitions. [2021-07-13 19:25:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:25:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 17 [2021-07-13 19:25:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:30,760 INFO L225 Difference]: With dead ends: 167 [2021-07-13 19:25:30,760 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:25:30,760 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:25:30,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:25:30,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-07-13 19:25:30,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 103 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 222 transitions. [2021-07-13 19:25:30,765 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 222 transitions. Word has length 17 [2021-07-13 19:25:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:30,765 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 222 transitions. [2021-07-13 19:25:30,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 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 19:25:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 222 transitions. [2021-07-13 19:25:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:30,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:30,765 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:30,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:30,982 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1781820862, now seen corresponding path program 5 times [2021-07-13 19:25:30,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:30,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470801251] [2021-07-13 19:25:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:31,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:31,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470801251] [2021-07-13 19:25:31,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470801251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:31,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136857738] [2021-07-13 19:25:31,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:31,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:25:31,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:31,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:31,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:31,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136857738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:31,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:31,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:31,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317299957] [2021-07-13 19:25:31,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:31,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:31,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:31,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:31,110 INFO L87 Difference]: Start difference. First operand 104 states and 222 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:31,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:31,240 INFO L93 Difference]: Finished difference Result 147 states and 286 transitions. [2021-07-13 19:25:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:25:31,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:31,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:31,241 INFO L225 Difference]: With dead ends: 147 [2021-07-13 19:25:31,241 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:25:31,242 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:25:31,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:25:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 103. [2021-07-13 19:25:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 217 transitions. [2021-07-13 19:25:31,256 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 217 transitions. Word has length 17 [2021-07-13 19:25:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:31,257 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 217 transitions. [2021-07-13 19:25:31,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:31,257 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 217 transitions. [2021-07-13 19:25:31,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:31,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:31,259 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:31,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:31,473 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:31,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash 397922780, now seen corresponding path program 6 times [2021-07-13 19:25:31,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:31,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683487957] [2021-07-13 19:25:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:31,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:31,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683487957] [2021-07-13 19:25:31,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683487957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:31,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570310178] [2021-07-13 19:25:31,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:31,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:31,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:31,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:31,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570310178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:31,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:31,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:31,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585307626] [2021-07-13 19:25:31,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:31,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:31,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:31,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:31,594 INFO L87 Difference]: Start difference. First operand 103 states and 217 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:31,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:31,650 INFO L93 Difference]: Finished difference Result 114 states and 233 transitions. [2021-07-13 19:25:31,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:25:31,650 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:31,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:31,651 INFO L225 Difference]: With dead ends: 114 [2021-07-13 19:25:31,651 INFO L226 Difference]: Without dead ends: 112 [2021-07-13 19:25:31,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-07-13 19:25:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-07-13 19:25:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 102 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 216 transitions. [2021-07-13 19:25:31,654 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 216 transitions. Word has length 17 [2021-07-13 19:25:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:31,654 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 216 transitions. [2021-07-13 19:25:31,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 216 transitions. [2021-07-13 19:25:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:31,655 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:31,655 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:31,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:31,869 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash 613173682, now seen corresponding path program 7 times [2021-07-13 19:25:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:31,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190748640] [2021-07-13 19:25:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:31,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190748640] [2021-07-13 19:25:31,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190748640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550143809] [2021-07-13 19:25:31,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:31,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:31,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550143809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:32,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:32,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778780155] [2021-07-13 19:25:32,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:32,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:32,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:32,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:32,008 INFO L87 Difference]: Start difference. First operand 103 states and 216 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 19:25:32,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:32,132 INFO L93 Difference]: Finished difference Result 208 states and 409 transitions. [2021-07-13 19:25:32,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:25:32,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 17 [2021-07-13 19:25:32,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:32,134 INFO L225 Difference]: With dead ends: 208 [2021-07-13 19:25:32,134 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 19:25:32,134 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:25:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 19:25:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 124. [2021-07-13 19:25:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.186991869918699) internal successors, (269), 123 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 269 transitions. [2021-07-13 19:25:32,137 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 269 transitions. Word has length 17 [2021-07-13 19:25:32,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:32,137 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 269 transitions. [2021-07-13 19:25:32,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 19:25:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 269 transitions. [2021-07-13 19:25:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:32,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:32,138 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:32,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:32,345 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:32,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978990, now seen corresponding path program 8 times [2021-07-13 19:25:32,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:32,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128425758] [2021-07-13 19:25:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:32,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128425758] [2021-07-13 19:25:32,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128425758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859632630] [2021-07-13 19:25:32,367 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 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 19:25:32,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:32,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:32,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:32,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859632630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:32,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36854477] [2021-07-13 19:25:32,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:32,439 INFO L87 Difference]: Start difference. First operand 124 states and 269 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:32,525 INFO L93 Difference]: Finished difference Result 145 states and 295 transitions. [2021-07-13 19:25:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:25:32,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:32,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:32,526 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:25:32,526 INFO L226 Difference]: Without dead ends: 142 [2021-07-13 19:25:32,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:25:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-13 19:25:32,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2021-07-13 19:25:32,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.191666666666667) internal successors, (263), 120 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 263 transitions. [2021-07-13 19:25:32,529 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 263 transitions. Word has length 17 [2021-07-13 19:25:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:32,529 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 263 transitions. [2021-07-13 19:25:32,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 263 transitions. [2021-07-13 19:25:32,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:32,530 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:32,530 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:32,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 19:25:32,745 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:32,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash 51051130, now seen corresponding path program 9 times [2021-07-13 19:25:32,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:32,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947936979] [2021-07-13 19:25:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947936979] [2021-07-13 19:25:32,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947936979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918536910] [2021-07-13 19:25:32,770 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 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 19:25:32,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:25:32,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:32,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:32,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:32,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918536910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:32,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:32,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:32,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333146128] [2021-07-13 19:25:32,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:32,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:32,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:32,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:32,861 INFO L87 Difference]: Start difference. First operand 121 states and 263 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:33,015 INFO L93 Difference]: Finished difference Result 165 states and 338 transitions. [2021-07-13 19:25:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:25:33,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:33,016 INFO L225 Difference]: With dead ends: 165 [2021-07-13 19:25:33,016 INFO L226 Difference]: Without dead ends: 165 [2021-07-13 19:25:33,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:25:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-13 19:25:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2021-07-13 19:25:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-07-13 19:25:33,020 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 17 [2021-07-13 19:25:33,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:33,020 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-07-13 19:25:33,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-07-13 19:25:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:33,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:33,020 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:33,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:33,229 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:33,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846952, now seen corresponding path program 10 times [2021-07-13 19:25:33,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:33,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571649417] [2021-07-13 19:25:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:33,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:33,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571649417] [2021-07-13 19:25:33,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571649417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:33,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493683841] [2021-07-13 19:25:33,267 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 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 19:25:33,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:33,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:33,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493683841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:33,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:33,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:33,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540524016] [2021-07-13 19:25:33,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:33,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:33,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:33,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:33,350 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:33,449 INFO L93 Difference]: Finished difference Result 199 states and 385 transitions. [2021-07-13 19:25:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:25:33,449 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:33,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:33,450 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:25:33,450 INFO L226 Difference]: Without dead ends: 197 [2021-07-13 19:25:33,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:25:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-07-13 19:25:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2021-07-13 19:25:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-07-13 19:25:33,453 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 17 [2021-07-13 19:25:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:33,454 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-07-13 19:25:33,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-07-13 19:25:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:33,454 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:33,454 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:33,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:33,665 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:33,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142718, now seen corresponding path program 11 times [2021-07-13 19:25:33,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:33,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373122215] [2021-07-13 19:25:33,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:33,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:33,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:33,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373122215] [2021-07-13 19:25:33,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373122215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:33,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563549328] [2021-07-13 19:25:33,689 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 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 19:25:33,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:25:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:33,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:33,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:33,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563549328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:33,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:33,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:33,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293004183] [2021-07-13 19:25:33,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:33,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:33,765 INFO L87 Difference]: Start difference. First operand 125 states and 270 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:33,965 INFO L93 Difference]: Finished difference Result 174 states and 367 transitions. [2021-07-13 19:25:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:33,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:33,967 INFO L225 Difference]: With dead ends: 174 [2021-07-13 19:25:33,967 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 19:25:33,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:25:33,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 19:25:33,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2021-07-13 19:25:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1769230769230767) internal successors, (283), 130 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 283 transitions. [2021-07-13 19:25:33,970 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 283 transitions. Word has length 17 [2021-07-13 19:25:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:33,970 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 283 transitions. [2021-07-13 19:25:33,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 283 transitions. [2021-07-13 19:25:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:25:33,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:33,971 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:34,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:25:34,188 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:34,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193218, now seen corresponding path program 12 times [2021-07-13 19:25:34,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:34,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770863005] [2021-07-13 19:25:34,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:34,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:34,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770863005] [2021-07-13 19:25:34,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770863005] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:34,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28100402] [2021-07-13 19:25:34,217 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 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 19:25:34,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:25:34,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:34,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-13 19:25:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:34,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28100402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:34,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:34,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 19:25:34,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187243007] [2021-07-13 19:25:34,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:34,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:34,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:34,300 INFO L87 Difference]: Start difference. First operand 131 states and 283 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:34,410 INFO L93 Difference]: Finished difference Result 205 states and 395 transitions. [2021-07-13 19:25:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:25:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:25:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:34,411 INFO L225 Difference]: With dead ends: 205 [2021-07-13 19:25:34,411 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:25:34,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:25:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:25:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 135. [2021-07-13 19:25:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1417910447761193) internal successors, (287), 134 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 287 transitions. [2021-07-13 19:25:34,415 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 287 transitions. Word has length 17 [2021-07-13 19:25:34,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:34,415 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 287 transitions. [2021-07-13 19:25:34,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 287 transitions. [2021-07-13 19:25:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:25:34,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:34,415 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:34,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:25:34,629 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:34,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1030417008, now seen corresponding path program 13 times [2021-07-13 19:25:34,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:34,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822858934] [2021-07-13 19:25:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:34,663 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 19:25:34,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:34,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822858934] [2021-07-13 19:25:34,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822858934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:34,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951996247] [2021-07-13 19:25:34,664 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 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 19:25:34,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:34,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:25:34,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:34,783 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 19:25:34,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951996247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:34,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:34,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:25:34,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473171801] [2021-07-13 19:25:34,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:25:34,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:34,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:25:34,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:25:34,784 INFO L87 Difference]: Start difference. First operand 135 states and 287 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:34,859 INFO L93 Difference]: Finished difference Result 224 states and 457 transitions. [2021-07-13 19:25:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:25:34,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:25:34,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:34,860 INFO L225 Difference]: With dead ends: 224 [2021-07-13 19:25:34,860 INFO L226 Difference]: Without dead ends: 217 [2021-07-13 19:25:34,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:25:34,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-07-13 19:25:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-07-13 19:25:34,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-07-13 19:25:34,864 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 19 [2021-07-13 19:25:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:34,866 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-07-13 19:25:34,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-07-13 19:25:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:25:34,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:34,868 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:35,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:25:35,073 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:35,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:35,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1048749968, now seen corresponding path program 14 times [2021-07-13 19:25:35,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:35,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819724823] [2021-07-13 19:25:35,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:35,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:35,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819724823] [2021-07-13 19:25:35,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819724823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393257088] [2021-07-13 19:25:35,115 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 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 19:25:35,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:35,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:35,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:25:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:35,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393257088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:35,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-07-13 19:25:35,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886559965] [2021-07-13 19:25:35,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:25:35,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:35,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:25:35,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:35,221 INFO L87 Difference]: Start difference. First operand 175 states and 382 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 19:25:35,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:35,301 INFO L93 Difference]: Finished difference Result 276 states and 576 transitions. [2021-07-13 19:25:35,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:25:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 19 [2021-07-13 19:25:35,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:35,303 INFO L225 Difference]: With dead ends: 276 [2021-07-13 19:25:35,303 INFO L226 Difference]: Without dead ends: 262 [2021-07-13 19:25:35,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:25:35,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-07-13 19:25:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-07-13 19:25:35,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2552083333333335) internal successors, (433), 192 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 433 transitions. [2021-07-13 19:25:35,313 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 433 transitions. Word has length 19 [2021-07-13 19:25:35,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:35,313 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 433 transitions. [2021-07-13 19:25:35,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 19:25:35,313 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 433 transitions. [2021-07-13 19:25:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:25:35,313 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:35,314 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:35,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:35,525 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:35,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:35,525 INFO L82 PathProgramCache]: Analyzing trace with hash -588981648, now seen corresponding path program 15 times [2021-07-13 19:25:35,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:35,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560504410] [2021-07-13 19:25:35,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:35,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:35,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560504410] [2021-07-13 19:25:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560504410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424813456] [2021-07-13 19:25:35,552 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 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 19:25:35,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:25:35,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:35,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:25:35,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:35,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424813456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:35,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-07-13 19:25:35,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134192740] [2021-07-13 19:25:35,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:25:35,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:35,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:25:35,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:25:35,662 INFO L87 Difference]: Start difference. First operand 193 states and 433 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:35,729 INFO L93 Difference]: Finished difference Result 276 states and 592 transitions. [2021-07-13 19:25:35,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:25:35,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:25:35,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:35,731 INFO L225 Difference]: With dead ends: 276 [2021-07-13 19:25:35,731 INFO L226 Difference]: Without dead ends: 269 [2021-07-13 19:25:35,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:25:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-07-13 19:25:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2021-07-13 19:25:35,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-07-13 19:25:35,735 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-07-13 19:25:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:35,736 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-07-13 19:25:35,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-07-13 19:25:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:35,736 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:35,736 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:35,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:35,953 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1461933170, now seen corresponding path program 16 times [2021-07-13 19:25:35,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:35,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686867464] [2021-07-13 19:25:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:35,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:35,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686867464] [2021-07-13 19:25:35,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686867464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:35,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279619974] [2021-07-13 19:25:35,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:25:36,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:36,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:36,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:36,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:36,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279619974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:36,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:36,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:25:36,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664195097] [2021-07-13 19:25:36,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:36,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:36,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:36,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:36,100 INFO L87 Difference]: Start difference. First operand 223 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 19:25:36,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:36,803 INFO L93 Difference]: Finished difference Result 437 states and 898 transitions. [2021-07-13 19:25:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:25:36,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 21 [2021-07-13 19:25:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:36,804 INFO L225 Difference]: With dead ends: 437 [2021-07-13 19:25:36,805 INFO L226 Difference]: Without dead ends: 437 [2021-07-13 19:25:36,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:25:36,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-07-13 19:25:36,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 183. [2021-07-13 19:25:36,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2527472527472527) internal successors, (410), 182 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 410 transitions. [2021-07-13 19:25:36,810 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 410 transitions. Word has length 21 [2021-07-13 19:25:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:36,811 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 410 transitions. [2021-07-13 19:25:36,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 19:25:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 410 transitions. [2021-07-13 19:25:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:36,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:36,811 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:37,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:37,025 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1465011118, now seen corresponding path program 17 times [2021-07-13 19:25:37,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:37,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906898942] [2021-07-13 19:25:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:37,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:37,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906898942] [2021-07-13 19:25:37,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906898942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:37,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55563968] [2021-07-13 19:25:37,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:25:37,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:25:37,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:37,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:37,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:37,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55563968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:37,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:37,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:25:37,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393251840] [2021-07-13 19:25:37,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:37,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:37,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:37,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:37,167 INFO L87 Difference]: Start difference. First operand 183 states and 410 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 19:25:37,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:37,553 INFO L93 Difference]: Finished difference Result 414 states and 782 transitions. [2021-07-13 19:25:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:25:37,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 21 [2021-07-13 19:25:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:37,556 INFO L225 Difference]: With dead ends: 414 [2021-07-13 19:25:37,556 INFO L226 Difference]: Without dead ends: 382 [2021-07-13 19:25:37,556 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 255.3ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:25:37,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-07-13 19:25:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 221. [2021-07-13 19:25:37,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2409090909090907) internal successors, (493), 220 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 493 transitions. [2021-07-13 19:25:37,561 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 493 transitions. Word has length 21 [2021-07-13 19:25:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:37,561 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 493 transitions. [2021-07-13 19:25:37,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 19:25:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 493 transitions. [2021-07-13 19:25:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:37,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:37,562 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:37,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:25:37,777 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:37,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:37,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2128550594, now seen corresponding path program 18 times [2021-07-13 19:25:37,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:37,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661914019] [2021-07-13 19:25:37,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:37,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661914019] [2021-07-13 19:25:37,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661914019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:37,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784403743] [2021-07-13 19:25:37,802 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 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 19:25:37,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:37,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:37,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:37,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:37,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784403743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:37,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:37,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:25:37,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393291241] [2021-07-13 19:25:37,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:37,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:37,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:37,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:37,883 INFO L87 Difference]: Start difference. First operand 221 states and 493 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:38,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:38,156 INFO L93 Difference]: Finished difference Result 371 states and 719 transitions. [2021-07-13 19:25:38,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:25:38,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:38,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:38,158 INFO L225 Difference]: With dead ends: 371 [2021-07-13 19:25:38,158 INFO L226 Difference]: Without dead ends: 371 [2021-07-13 19:25:38,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:38,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-07-13 19:25:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 218. [2021-07-13 19:25:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.225806451612903) internal successors, (483), 217 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 483 transitions. [2021-07-13 19:25:38,164 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 483 transitions. Word has length 21 [2021-07-13 19:25:38,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:38,164 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 483 transitions. [2021-07-13 19:25:38,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 483 transitions. [2021-07-13 19:25:38,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:38,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:38,165 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:38,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:25:38,373 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:38,373 INFO L82 PathProgramCache]: Analyzing trace with hash 744652512, now seen corresponding path program 19 times [2021-07-13 19:25:38,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:38,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722936186] [2021-07-13 19:25:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:38,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:38,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722936186] [2021-07-13 19:25:38,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722936186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:38,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116569339] [2021-07-13 19:25:38,402 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 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 19:25:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:38,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116569339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:38,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:38,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:25:38,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529173184] [2021-07-13 19:25:38,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:38,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:38,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:38,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:38,492 INFO L87 Difference]: Start difference. First operand 218 states and 483 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:38,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:38,582 INFO L93 Difference]: Finished difference Result 238 states and 514 transitions. [2021-07-13 19:25:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:25:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:38,583 INFO L225 Difference]: With dead ends: 238 [2021-07-13 19:25:38,583 INFO L226 Difference]: Without dead ends: 236 [2021-07-13 19:25:38,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:25:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-07-13 19:25:38,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-07-13 19:25:38,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2211981566820276) internal successors, (482), 217 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:38,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 482 transitions. [2021-07-13 19:25:38,587 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 482 transitions. Word has length 21 [2021-07-13 19:25:38,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:38,587 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 482 transitions. [2021-07-13 19:25:38,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:38,587 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 482 transitions. [2021-07-13 19:25:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:38,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:38,588 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:38,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:25:38,805 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:38,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -157465486, now seen corresponding path program 20 times [2021-07-13 19:25:38,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:38,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584849070] [2021-07-13 19:25:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:38,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:38,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:38,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584849070] [2021-07-13 19:25:38,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584849070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:38,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565338861] [2021-07-13 19:25:38,835 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 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 19:25:38,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:38,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:38,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:38,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:38,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565338861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:38,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:38,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:25:38,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563062872] [2021-07-13 19:25:38,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:38,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:38,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:38,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:38,927 INFO L87 Difference]: Start difference. First operand 218 states and 482 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 19:25:39,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:39,206 INFO L93 Difference]: Finished difference Result 631 states and 1240 transitions. [2021-07-13 19:25:39,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:25:39,206 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 21 [2021-07-13 19:25:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:39,208 INFO L225 Difference]: With dead ends: 631 [2021-07-13 19:25:39,208 INFO L226 Difference]: Without dead ends: 631 [2021-07-13 19:25:39,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:25:39,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-13 19:25:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 263. [2021-07-13 19:25:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.267175572519084) internal successors, (594), 262 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:39,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 594 transitions. [2021-07-13 19:25:39,216 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 594 transitions. Word has length 21 [2021-07-13 19:25:39,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:39,216 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 594 transitions. [2021-07-13 19:25:39,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 19:25:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 594 transitions. [2021-07-13 19:25:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:39,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:39,216 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:39,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:25:39,433 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:39,434 INFO L82 PathProgramCache]: Analyzing trace with hash 545339822, now seen corresponding path program 21 times [2021-07-13 19:25:39,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:39,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832524169] [2021-07-13 19:25:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:39,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:39,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832524169] [2021-07-13 19:25:39,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832524169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:39,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337741239] [2021-07-13 19:25:39,458 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 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 19:25:39,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:39,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:39,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:39,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:39,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337741239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:39,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:39,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:25:39,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591885023] [2021-07-13 19:25:39,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:39,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:39,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:39,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:39,582 INFO L87 Difference]: Start difference. First operand 263 states and 594 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 19:25:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:39,852 INFO L93 Difference]: Finished difference Result 429 states and 858 transitions. [2021-07-13 19:25:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:25:39,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21 [2021-07-13 19:25:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:39,854 INFO L225 Difference]: With dead ends: 429 [2021-07-13 19:25:39,854 INFO L226 Difference]: Without dead ends: 423 [2021-07-13 19:25:39,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:25:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-07-13 19:25:39,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 263. [2021-07-13 19:25:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.263358778625954) internal successors, (593), 262 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 593 transitions. [2021-07-13 19:25:39,863 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 593 transitions. Word has length 21 [2021-07-13 19:25:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:39,863 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 593 transitions. [2021-07-13 19:25:39,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 19:25:39,864 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 593 transitions. [2021-07-13 19:25:39,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:39,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:39,864 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:40,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:25:40,080 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash -719588038, now seen corresponding path program 22 times [2021-07-13 19:25:40,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:40,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644320796] [2021-07-13 19:25:40,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:40,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:40,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644320796] [2021-07-13 19:25:40,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644320796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:40,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140308336] [2021-07-13 19:25:40,108 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:25:40,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:40,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:40,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:40,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:40,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140308336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:40,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:40,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:25:40,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051888994] [2021-07-13 19:25:40,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:40,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:40,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:40,222 INFO L87 Difference]: Start difference. First operand 263 states and 593 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:40,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:40,543 INFO L93 Difference]: Finished difference Result 520 states and 1042 transitions. [2021-07-13 19:25:40,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:25:40,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:40,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:40,545 INFO L225 Difference]: With dead ends: 520 [2021-07-13 19:25:40,545 INFO L226 Difference]: Without dead ends: 520 [2021-07-13 19:25:40,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:25:40,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-07-13 19:25:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 264. [2021-07-13 19:25:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.2623574144486693) internal successors, (595), 263 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 595 transitions. [2021-07-13 19:25:40,551 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 595 transitions. Word has length 21 [2021-07-13 19:25:40,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:40,551 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 595 transitions. [2021-07-13 19:25:40,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 595 transitions. [2021-07-13 19:25:40,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:40,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:40,552 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:40,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:40,761 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:40,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486120, now seen corresponding path program 23 times [2021-07-13 19:25:40,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:40,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003985846] [2021-07-13 19:25:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:40,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:40,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003985846] [2021-07-13 19:25:40,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003985846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:40,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750925717] [2021-07-13 19:25:40,797 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 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 19:25:40,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:25:40,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:40,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:40,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:40,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750925717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:40,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:40,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:25:40,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307743563] [2021-07-13 19:25:40,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:40,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:40,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:40,903 INFO L87 Difference]: Start difference. First operand 264 states and 595 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:41,097 INFO L93 Difference]: Finished difference Result 475 states and 944 transitions. [2021-07-13 19:25:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:25:41,098 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:41,099 INFO L225 Difference]: With dead ends: 475 [2021-07-13 19:25:41,099 INFO L226 Difference]: Without dead ends: 471 [2021-07-13 19:25:41,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:25:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-07-13 19:25:41,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2021-07-13 19:25:41,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.2528301886792454) internal successors, (597), 265 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 597 transitions. [2021-07-13 19:25:41,105 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 597 transitions. Word has length 21 [2021-07-13 19:25:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:41,105 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 597 transitions. [2021-07-13 19:25:41,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 597 transitions. [2021-07-13 19:25:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:41,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:41,105 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:41,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:25:41,321 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:41,321 INFO L82 PathProgramCache]: Analyzing trace with hash 374503550, now seen corresponding path program 24 times [2021-07-13 19:25:41,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:41,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229982086] [2021-07-13 19:25:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:41,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:41,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229982086] [2021-07-13 19:25:41,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229982086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:41,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230719785] [2021-07-13 19:25:41,351 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 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 19:25:41,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:25:41,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:41,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:41,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230719785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:41,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:41,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:25:41,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703489258] [2021-07-13 19:25:41,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:25:41,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:41,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:25:41,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:25:41,457 INFO L87 Difference]: Start difference. First operand 266 states and 597 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:41,850 INFO L93 Difference]: Finished difference Result 451 states and 913 transitions. [2021-07-13 19:25:41,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:25:41,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:41,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:41,852 INFO L225 Difference]: With dead ends: 451 [2021-07-13 19:25:41,852 INFO L226 Difference]: Without dead ends: 451 [2021-07-13 19:25:41,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 252.3ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:25:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-07-13 19:25:41,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 250. [2021-07-13 19:25:41,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.216867469879518) internal successors, (552), 249 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 552 transitions. [2021-07-13 19:25:41,857 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 552 transitions. Word has length 21 [2021-07-13 19:25:41,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:41,857 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 552 transitions. [2021-07-13 19:25:41,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:41,857 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 552 transitions. [2021-07-13 19:25:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:41,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:41,857 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:42,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:42,065 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:42,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134910, now seen corresponding path program 25 times [2021-07-13 19:25:42,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:42,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799983322] [2021-07-13 19:25:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:42,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:42,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799983322] [2021-07-13 19:25:42,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799983322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:42,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409539878] [2021-07-13 19:25:42,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:25:42,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:42,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:42,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409539878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:42,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:42,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:25:42,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319101839] [2021-07-13 19:25:42,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:25:42,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:42,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:25:42,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:25:42,199 INFO L87 Difference]: Start difference. First operand 250 states and 552 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:42,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:42,427 INFO L93 Difference]: Finished difference Result 408 states and 804 transitions. [2021-07-13 19:25:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:25:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:42,429 INFO L225 Difference]: With dead ends: 408 [2021-07-13 19:25:42,429 INFO L226 Difference]: Without dead ends: 402 [2021-07-13 19:25:42,429 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:25:42,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-07-13 19:25:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-07-13 19:25:42,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.205533596837945) internal successors, (558), 253 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 558 transitions. [2021-07-13 19:25:42,434 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 558 transitions. Word has length 21 [2021-07-13 19:25:42,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:42,434 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 558 transitions. [2021-07-13 19:25:42,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 558 transitions. [2021-07-13 19:25:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:42,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:42,434 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:42,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:25:42,641 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:42,641 INFO L82 PathProgramCache]: Analyzing trace with hash 19311986, now seen corresponding path program 26 times [2021-07-13 19:25:42,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:42,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209680978] [2021-07-13 19:25:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:42,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:42,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:42,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209680978] [2021-07-13 19:25:42,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209680978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:42,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585665020] [2021-07-13 19:25:42,673 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 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 19:25:42,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:42,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:42,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:42,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:42,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585665020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:42,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:42,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:25:42,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305135402] [2021-07-13 19:25:42,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:25:42,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:42,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:25:42,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:25:42,806 INFO L87 Difference]: Start difference. First operand 254 states and 558 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:43,160 INFO L93 Difference]: Finished difference Result 462 states and 931 transitions. [2021-07-13 19:25:43,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:25:43,161 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:43,162 INFO L225 Difference]: With dead ends: 462 [2021-07-13 19:25:43,162 INFO L226 Difference]: Without dead ends: 462 [2021-07-13 19:25:43,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:25:43,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-07-13 19:25:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 243. [2021-07-13 19:25:43,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1735537190082646) internal successors, (526), 242 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 526 transitions. [2021-07-13 19:25:43,168 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 526 transitions. Word has length 21 [2021-07-13 19:25:43,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:43,168 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 526 transitions. [2021-07-13 19:25:43,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,168 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 526 transitions. [2021-07-13 19:25:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:43,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:43,168 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:43,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:43,375 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:43,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1105347502, now seen corresponding path program 27 times [2021-07-13 19:25:43,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:43,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461827457] [2021-07-13 19:25:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:43,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:43,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:43,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461827457] [2021-07-13 19:25:43,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461827457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:43,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717511180] [2021-07-13 19:25:43,406 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:43,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:25:43,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:43,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:43,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:43,495 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:43,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717511180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:43,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:43,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-07-13 19:25:43,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717796442] [2021-07-13 19:25:43,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:25:43,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:43,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:25:43,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:25:43,496 INFO L87 Difference]: Start difference. First operand 243 states and 526 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 19:25:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:43,760 INFO L93 Difference]: Finished difference Result 331 states and 646 transitions. [2021-07-13 19:25:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:25:43,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 21 [2021-07-13 19:25:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:43,761 INFO L225 Difference]: With dead ends: 331 [2021-07-13 19:25:43,761 INFO L226 Difference]: Without dead ends: 322 [2021-07-13 19:25:43,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:25:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-07-13 19:25:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 228. [2021-07-13 19:25:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.185022026431718) internal successors, (496), 227 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 496 transitions. [2021-07-13 19:25:43,765 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 496 transitions. Word has length 21 [2021-07-13 19:25:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:43,766 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 496 transitions. [2021-07-13 19:25:43,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 19:25:43,766 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 496 transitions. [2021-07-13 19:25:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:43,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:43,766 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:43,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:25:43,981 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:43,981 INFO L82 PathProgramCache]: Analyzing trace with hash -701741454, now seen corresponding path program 28 times [2021-07-13 19:25:43,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:43,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935718241] [2021-07-13 19:25:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:44,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:44,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935718241] [2021-07-13 19:25:44,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935718241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:44,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153104796] [2021-07-13 19:25:44,005 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 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 19:25:44,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:44,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:44,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:44,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:44,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153104796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:44,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:44,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:25:44,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854721956] [2021-07-13 19:25:44,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:44,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:44,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:44,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:44,088 INFO L87 Difference]: Start difference. First operand 228 states and 496 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 19:25:44,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:44,323 INFO L93 Difference]: Finished difference Result 389 states and 758 transitions. [2021-07-13 19:25:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:25:44,323 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 21 [2021-07-13 19:25:44,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:44,325 INFO L225 Difference]: With dead ends: 389 [2021-07-13 19:25:44,325 INFO L226 Difference]: Without dead ends: 389 [2021-07-13 19:25:44,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:25:44,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-13 19:25:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 228. [2021-07-13 19:25:44,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.1806167400881056) internal successors, (495), 227 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 495 transitions. [2021-07-13 19:25:44,341 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 495 transitions. Word has length 21 [2021-07-13 19:25:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:44,341 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 495 transitions. [2021-07-13 19:25:44,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 19:25:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 495 transitions. [2021-07-13 19:25:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:44,342 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:44,342 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:44,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:44,557 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1063854, now seen corresponding path program 29 times [2021-07-13 19:25:44,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:44,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059338293] [2021-07-13 19:25:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:44,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:44,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059338293] [2021-07-13 19:25:44,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059338293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:44,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913276918] [2021-07-13 19:25:44,586 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 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 19:25:44,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:25:44,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:44,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:44,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:44,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913276918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:44,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:44,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:25:44,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180911811] [2021-07-13 19:25:44,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:44,671 INFO L87 Difference]: Start difference. First operand 228 states and 495 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 19:25:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:44,847 INFO L93 Difference]: Finished difference Result 278 states and 563 transitions. [2021-07-13 19:25:44,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:25:44,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 21 [2021-07-13 19:25:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:44,849 INFO L225 Difference]: With dead ends: 278 [2021-07-13 19:25:44,849 INFO L226 Difference]: Without dead ends: 275 [2021-07-13 19:25:44,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:25:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-07-13 19:25:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 225. [2021-07-13 19:25:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1830357142857144) internal successors, (489), 224 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 489 transitions. [2021-07-13 19:25:44,852 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 489 transitions. Word has length 21 [2021-07-13 19:25:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:44,853 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 489 transitions. [2021-07-13 19:25:44,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 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 19:25:44,853 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 489 transitions. [2021-07-13 19:25:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:44,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:44,853 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:45,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:25:45,065 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:45,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:45,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1263864006, now seen corresponding path program 30 times [2021-07-13 19:25:45,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:45,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465588604] [2021-07-13 19:25:45,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:45,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:45,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465588604] [2021-07-13 19:25:45,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465588604] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:45,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020839825] [2021-07-13 19:25:45,093 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 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 19:25:45,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:45,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:45,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:45,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:45,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020839825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:45,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:45,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:25:45,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22809216] [2021-07-13 19:25:45,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:45,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:45,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:45,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:45,191 INFO L87 Difference]: Start difference. First operand 225 states and 489 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:45,475 INFO L93 Difference]: Finished difference Result 315 states and 641 transitions. [2021-07-13 19:25:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:25:45,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:45,476 INFO L225 Difference]: With dead ends: 315 [2021-07-13 19:25:45,476 INFO L226 Difference]: Without dead ends: 315 [2021-07-13 19:25:45,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:25:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-07-13 19:25:45,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 226. [2021-07-13 19:25:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1822222222222223) internal successors, (491), 225 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:45,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 491 transitions. [2021-07-13 19:25:45,480 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 491 transitions. Word has length 21 [2021-07-13 19:25:45,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:45,480 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 491 transitions. [2021-07-13 19:25:45,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:45,480 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 491 transitions. [2021-07-13 19:25:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:45,480 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:45,481 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:45,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:45,696 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1647205208, now seen corresponding path program 31 times [2021-07-13 19:25:45,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:45,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781600527] [2021-07-13 19:25:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:45,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:45,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781600527] [2021-07-13 19:25:45,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781600527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:45,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614883288] [2021-07-13 19:25:45,720 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 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 19:25:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:45,804 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:45,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614883288] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:45,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:45,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:25:45,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995588526] [2021-07-13 19:25:45,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:45,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:45,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:45,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:45,805 INFO L87 Difference]: Start difference. First operand 226 states and 491 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:46,004 INFO L93 Difference]: Finished difference Result 367 states and 714 transitions. [2021-07-13 19:25:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:25:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:46,005 INFO L225 Difference]: With dead ends: 367 [2021-07-13 19:25:46,005 INFO L226 Difference]: Without dead ends: 365 [2021-07-13 19:25:46,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:25:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-07-13 19:25:46,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 226. [2021-07-13 19:25:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1777777777777776) internal successors, (490), 225 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 490 transitions. [2021-07-13 19:25:46,009 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 490 transitions. Word has length 21 [2021-07-13 19:25:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:46,009 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 490 transitions. [2021-07-13 19:25:46,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:46,010 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 490 transitions. [2021-07-13 19:25:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:46,010 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:46,010 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:46,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:25:46,226 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:46,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:46,227 INFO L82 PathProgramCache]: Analyzing trace with hash -169772418, now seen corresponding path program 32 times [2021-07-13 19:25:46,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:46,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626462266] [2021-07-13 19:25:46,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:46,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:46,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626462266] [2021-07-13 19:25:46,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626462266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:46,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893297132] [2021-07-13 19:25:46,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:25:46,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:46,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893297132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:46,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:46,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:25:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413727816] [2021-07-13 19:25:46,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:46,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:46,340 INFO L87 Difference]: Start difference. First operand 226 states and 490 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:47,023 INFO L93 Difference]: Finished difference Result 472 states and 966 transitions. [2021-07-13 19:25:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:25:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:47,025 INFO L225 Difference]: With dead ends: 472 [2021-07-13 19:25:47,025 INFO L226 Difference]: Without dead ends: 472 [2021-07-13 19:25:47,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:25:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-07-13 19:25:47,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 230. [2021-07-13 19:25:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1746724890829694) internal successors, (498), 229 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 19:25:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 498 transitions. [2021-07-13 19:25:47,029 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 498 transitions. Word has length 21 [2021-07-13 19:25:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:47,029 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 498 transitions. [2021-07-13 19:25:47,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 498 transitions. [2021-07-13 19:25:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:47,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:47,030 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:47,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 19:25:47,246 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:47,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1140858942, now seen corresponding path program 33 times [2021-07-13 19:25:47,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:47,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634152356] [2021-07-13 19:25:47,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:47,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:47,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634152356] [2021-07-13 19:25:47,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634152356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:47,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168791652] [2021-07-13 19:25:47,270 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:25:47,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:47,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:47,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:47,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168791652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:47,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:47,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-07-13 19:25:47,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50215803] [2021-07-13 19:25:47,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:47,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:47,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:47,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:47,368 INFO L87 Difference]: Start difference. First operand 230 states and 498 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:47,654 INFO L93 Difference]: Finished difference Result 418 states and 797 transitions. [2021-07-13 19:25:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:25:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:47,655 INFO L225 Difference]: With dead ends: 418 [2021-07-13 19:25:47,655 INFO L226 Difference]: Without dead ends: 398 [2021-07-13 19:25:47,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:25:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-07-13 19:25:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 230. [2021-07-13 19:25:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1572052401746724) internal successors, (494), 229 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 494 transitions. [2021-07-13 19:25:47,660 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 494 transitions. Word has length 21 [2021-07-13 19:25:47,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:47,660 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 494 transitions. [2021-07-13 19:25:47,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 494 transitions. [2021-07-13 19:25:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:47,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:47,660 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:47,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:25:47,881 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1900542150, now seen corresponding path program 34 times [2021-07-13 19:25:47,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:47,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241062872] [2021-07-13 19:25:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:47,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:47,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241062872] [2021-07-13 19:25:47,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241062872] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:47,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906594909] [2021-07-13 19:25:47,910 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 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 19:25:47,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:48,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906594909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:48,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:48,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:25:48,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233120440] [2021-07-13 19:25:48,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:48,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:48,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:48,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:48,001 INFO L87 Difference]: Start difference. First operand 230 states and 494 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:48,638 INFO L93 Difference]: Finished difference Result 394 states and 828 transitions. [2021-07-13 19:25:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:25:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:48,639 INFO L225 Difference]: With dead ends: 394 [2021-07-13 19:25:48,639 INFO L226 Difference]: Without dead ends: 392 [2021-07-13 19:25:48,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:25:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-07-13 19:25:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 227. [2021-07-13 19:25:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1548672566371683) internal successors, (487), 226 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 487 transitions. [2021-07-13 19:25:48,658 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 487 transitions. Word has length 21 [2021-07-13 19:25:48,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:48,658 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 487 transitions. [2021-07-13 19:25:48,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:48,658 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 487 transitions. [2021-07-13 19:25:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:25:48,658 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:48,659 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:48,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:25:48,869 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash 913637562, now seen corresponding path program 35 times [2021-07-13 19:25:48,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:48,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141928363] [2021-07-13 19:25:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:48,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:48,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141928363] [2021-07-13 19:25:48,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141928363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:48,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813449044] [2021-07-13 19:25:48,898 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 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 19:25:48,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:25:48,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:48,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:25:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:48,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:48,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813449044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:48,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:48,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-13 19:25:48,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680833288] [2021-07-13 19:25:48,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:48,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:48,989 INFO L87 Difference]: Start difference. First operand 227 states and 487 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:49,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:49,254 INFO L93 Difference]: Finished difference Result 340 states and 660 transitions. [2021-07-13 19:25:49,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:25:49,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:25:49,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:49,256 INFO L225 Difference]: With dead ends: 340 [2021-07-13 19:25:49,256 INFO L226 Difference]: Without dead ends: 330 [2021-07-13 19:25:49,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:25:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-07-13 19:25:49,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 227. [2021-07-13 19:25:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1371681415929205) internal successors, (483), 226 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 483 transitions. [2021-07-13 19:25:49,259 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 483 transitions. Word has length 21 [2021-07-13 19:25:49,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:49,259 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 483 transitions. [2021-07-13 19:25:49,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 483 transitions. [2021-07-13 19:25:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:25:49,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:49,260 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:49,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:25:49,476 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash -459784912, now seen corresponding path program 36 times [2021-07-13 19:25:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:49,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400616386] [2021-07-13 19:25:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:49,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:49,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400616386] [2021-07-13 19:25:49,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400616386] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:49,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021961307] [2021-07-13 19:25:49,511 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 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 19:25:49,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:25:49,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:49,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:49,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:49,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021961307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:49,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:49,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-07-13 19:25:49,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366986054] [2021-07-13 19:25:49,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:25:49,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:49,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:25:49,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:25:49,639 INFO L87 Difference]: Start difference. First operand 227 states and 483 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:49,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:49,723 INFO L93 Difference]: Finished difference Result 364 states and 746 transitions. [2021-07-13 19:25:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:25:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:25:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:49,724 INFO L225 Difference]: With dead ends: 364 [2021-07-13 19:25:49,724 INFO L226 Difference]: Without dead ends: 357 [2021-07-13 19:25:49,724 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:25:49,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-07-13 19:25:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 296. [2021-07-13 19:25:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.1796610169491526) internal successors, (643), 295 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 643 transitions. [2021-07-13 19:25:49,729 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 643 transitions. Word has length 23 [2021-07-13 19:25:49,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:49,729 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 643 transitions. [2021-07-13 19:25:49,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 643 transitions. [2021-07-13 19:25:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:25:49,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:49,733 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:49,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:25:49,949 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:49,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:49,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1734689328, now seen corresponding path program 37 times [2021-07-13 19:25:49,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:49,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686132629] [2021-07-13 19:25:49,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:49,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:49,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686132629] [2021-07-13 19:25:49,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686132629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:49,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906642598] [2021-07-13 19:25:49,984 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 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 19:25:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:50,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:50,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906642598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:50,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:50,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 9 [2021-07-13 19:25:50,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7123331] [2021-07-13 19:25:50,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:25:50,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:50,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:25:50,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:50,114 INFO L87 Difference]: Start difference. First operand 296 states and 643 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 19:25:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:50,237 INFO L93 Difference]: Finished difference Result 431 states and 902 transitions. [2021-07-13 19:25:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:25:50,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 23 [2021-07-13 19:25:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:50,238 INFO L225 Difference]: With dead ends: 431 [2021-07-13 19:25:50,238 INFO L226 Difference]: Without dead ends: 417 [2021-07-13 19:25:50,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:25:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-07-13 19:25:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 324. [2021-07-13 19:25:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.2321981424148607) internal successors, (721), 323 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 721 transitions. [2021-07-13 19:25:50,242 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 721 transitions. Word has length 23 [2021-07-13 19:25:50,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:50,242 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 721 transitions. [2021-07-13 19:25:50,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 19:25:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 721 transitions. [2021-07-13 19:25:50,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:25:50,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:50,243 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:50,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 19:25:50,457 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:50,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1856120112, now seen corresponding path program 38 times [2021-07-13 19:25:50,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:50,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054574090] [2021-07-13 19:25:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:50,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:50,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054574090] [2021-07-13 19:25:50,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054574090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:50,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288216848] [2021-07-13 19:25:50,491 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 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 19:25:50,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:50,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:50,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:50,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:50,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288216848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:50,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:50,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2021-07-13 19:25:50,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198884297] [2021-07-13 19:25:50,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:25:50,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:25:50,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:50,705 INFO L87 Difference]: Start difference. First operand 324 states and 721 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:50,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:50,886 INFO L93 Difference]: Finished difference Result 495 states and 1049 transitions. [2021-07-13 19:25:50,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:25:50,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-13 19:25:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:50,888 INFO L225 Difference]: With dead ends: 495 [2021-07-13 19:25:50,888 INFO L226 Difference]: Without dead ends: 481 [2021-07-13 19:25:50,889 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:25:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-07-13 19:25:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 356. [2021-07-13 19:25:50,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.267605633802817) internal successors, (805), 355 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 805 transitions. [2021-07-13 19:25:50,893 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 805 transitions. Word has length 23 [2021-07-13 19:25:50,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:50,893 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 805 transitions. [2021-07-13 19:25:50,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:50,893 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 805 transitions. [2021-07-13 19:25:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-13 19:25:50,894 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:50,894 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:51,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:51,095 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1707980752, now seen corresponding path program 39 times [2021-07-13 19:25:51,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:51,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393898148] [2021-07-13 19:25:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:25:51,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:51,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393898148] [2021-07-13 19:25:51,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393898148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:51,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942842024] [2021-07-13 19:25:51,127 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 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 19:25:51,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:25:51,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:51,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:25:51,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:51,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942842024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:51,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:51,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-07-13 19:25:51,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945979343] [2021-07-13 19:25:51,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:25:51,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:51,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:25:51,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:25:51,247 INFO L87 Difference]: Start difference. First operand 356 states and 805 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 19:25:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:51,344 INFO L93 Difference]: Finished difference Result 482 states and 1047 transitions. [2021-07-13 19:25:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:25:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 23 [2021-07-13 19:25:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:51,347 INFO L225 Difference]: With dead ends: 482 [2021-07-13 19:25:51,347 INFO L226 Difference]: Without dead ends: 475 [2021-07-13 19:25:51,347 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:25:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-07-13 19:25:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 404. [2021-07-13 19:25:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2853598014888337) internal successors, (921), 403 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:51,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 921 transitions. [2021-07-13 19:25:51,352 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 921 transitions. Word has length 23 [2021-07-13 19:25:51,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:51,354 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 921 transitions. [2021-07-13 19:25:51,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 19:25:51,354 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 921 transitions. [2021-07-13 19:25:51,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:51,354 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:51,355 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:51,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:51,565 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:51,565 INFO L82 PathProgramCache]: Analyzing trace with hash 942134834, now seen corresponding path program 40 times [2021-07-13 19:25:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:51,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796957843] [2021-07-13 19:25:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:51,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:51,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796957843] [2021-07-13 19:25:51,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796957843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:51,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141327167] [2021-07-13 19:25:51,605 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 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 19:25:51,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:51,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:51,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:51,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:51,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141327167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:51,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:51,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:25:51,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086916358] [2021-07-13 19:25:51,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:25:51,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:51,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:25:51,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:25:51,729 INFO L87 Difference]: Start difference. First operand 404 states and 921 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:53,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:53,282 INFO L93 Difference]: Finished difference Result 869 states and 1808 transitions. [2021-07-13 19:25:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:25:53,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:25:53,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:53,285 INFO L225 Difference]: With dead ends: 869 [2021-07-13 19:25:53,285 INFO L226 Difference]: Without dead ends: 869 [2021-07-13 19:25:53,286 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1096.4ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:25:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-07-13 19:25:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 330. [2021-07-13 19:25:53,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2674772036474162) internal successors, (746), 329 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 746 transitions. [2021-07-13 19:25:53,292 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 746 transitions. Word has length 25 [2021-07-13 19:25:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:53,292 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 746 transitions. [2021-07-13 19:25:53,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 746 transitions. [2021-07-13 19:25:53,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:53,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:53,293 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:53,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:53,506 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:53,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:53,506 INFO L82 PathProgramCache]: Analyzing trace with hash -394924434, now seen corresponding path program 41 times [2021-07-13 19:25:53,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:53,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646807120] [2021-07-13 19:25:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:53,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:53,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:53,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646807120] [2021-07-13 19:25:53,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646807120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:53,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886008732] [2021-07-13 19:25:53,546 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 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 19:25:53,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:25:53,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:53,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:53,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886008732] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:53,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:53,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:25:53,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59678910] [2021-07-13 19:25:53,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:25:53,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:53,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:25:53,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:25:53,655 INFO L87 Difference]: Start difference. First operand 330 states and 746 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:54,360 INFO L93 Difference]: Finished difference Result 766 states and 1462 transitions. [2021-07-13 19:25:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:25:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:25:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:54,363 INFO L225 Difference]: With dead ends: 766 [2021-07-13 19:25:54,363 INFO L226 Difference]: Without dead ends: 710 [2021-07-13 19:25:54,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 573.3ms TimeCoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:25:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-07-13 19:25:54,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 406. [2021-07-13 19:25:54,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.246913580246914) internal successors, (910), 405 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:54,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 910 transitions. [2021-07-13 19:25:54,370 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 910 transitions. Word has length 25 [2021-07-13 19:25:54,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:54,370 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 910 transitions. [2021-07-13 19:25:54,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:54,370 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 910 transitions. [2021-07-13 19:25:54,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:54,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:54,371 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:54,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 19:25:54,587 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1298777542, now seen corresponding path program 42 times [2021-07-13 19:25:54,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:54,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433300406] [2021-07-13 19:25:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:54,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:54,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433300406] [2021-07-13 19:25:54,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433300406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:54,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501752278] [2021-07-13 19:25:54,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:54,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:25:54,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:54,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:54,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:54,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501752278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:54,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:54,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-07-13 19:25:54,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087525934] [2021-07-13 19:25:54,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:25:54,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:54,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:25:54,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:25:54,735 INFO L87 Difference]: Start difference. First operand 406 states and 910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:55,270 INFO L93 Difference]: Finished difference Result 728 states and 1423 transitions. [2021-07-13 19:25:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:25:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:25:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:55,273 INFO L225 Difference]: With dead ends: 728 [2021-07-13 19:25:55,273 INFO L226 Difference]: Without dead ends: 728 [2021-07-13 19:25:55,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 380.5ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:25:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-07-13 19:25:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 402. [2021-07-13 19:25:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2369077306733165) internal successors, (897), 401 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 897 transitions. [2021-07-13 19:25:55,279 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 897 transitions. Word has length 25 [2021-07-13 19:25:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:55,279 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 897 transitions. [2021-07-13 19:25:55,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 897 transitions. [2021-07-13 19:25:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:55,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:55,280 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:55,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:55,481 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:55,481 INFO L82 PathProgramCache]: Analyzing trace with hash -85120540, now seen corresponding path program 43 times [2021-07-13 19:25:55,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:55,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027418274] [2021-07-13 19:25:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:55,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:55,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:55,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027418274] [2021-07-13 19:25:55,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027418274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:55,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48775717] [2021-07-13 19:25:55,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:55,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48775717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:55,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:55,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-07-13 19:25:55,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947352099] [2021-07-13 19:25:55,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:25:55,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:55,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:25:55,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:25:55,620 INFO L87 Difference]: Start difference. First operand 402 states and 897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:55,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:55,739 INFO L93 Difference]: Finished difference Result 437 states and 953 transitions. [2021-07-13 19:25:55,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:25:55,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:25:55,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:55,741 INFO L225 Difference]: With dead ends: 437 [2021-07-13 19:25:55,741 INFO L226 Difference]: Without dead ends: 435 [2021-07-13 19:25:55,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:25:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-07-13 19:25:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 402. [2021-07-13 19:25:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2344139650872816) internal successors, (896), 401 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 896 transitions. [2021-07-13 19:25:55,746 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 896 transitions. Word has length 25 [2021-07-13 19:25:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:55,746 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 896 transitions. [2021-07-13 19:25:55,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 896 transitions. [2021-07-13 19:25:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:55,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:55,747 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:55,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:55,953 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1036927438, now seen corresponding path program 44 times [2021-07-13 19:25:55,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:55,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074197520] [2021-07-13 19:25:55,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:55,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:55,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:55,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074197520] [2021-07-13 19:25:55,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074197520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:55,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965500987] [2021-07-13 19:25:55,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:56,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:25:56,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:56,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:56,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:56,099 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:56,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965500987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:56,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:56,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-07-13 19:25:56,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791220483] [2021-07-13 19:25:56,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:25:56,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:56,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:25:56,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:56,100 INFO L87 Difference]: Start difference. First operand 402 states and 896 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:56,863 INFO L93 Difference]: Finished difference Result 1175 states and 2298 transitions. [2021-07-13 19:25:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-13 19:25:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:25:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:56,867 INFO L225 Difference]: With dead ends: 1175 [2021-07-13 19:25:56,867 INFO L226 Difference]: Without dead ends: 1175 [2021-07-13 19:25:56,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 482.8ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:25:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-07-13 19:25:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 477. [2021-07-13 19:25:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.2668067226890756) internal successors, (1079), 476 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1079 transitions. [2021-07-13 19:25:56,875 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1079 transitions. Word has length 25 [2021-07-13 19:25:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:56,876 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1079 transitions. [2021-07-13 19:25:56,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1079 transitions. [2021-07-13 19:25:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:56,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:56,876 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:57,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:25:57,087 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:57,087 INFO L82 PathProgramCache]: Analyzing trace with hash -334122130, now seen corresponding path program 45 times [2021-07-13 19:25:57,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:57,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225632130] [2021-07-13 19:25:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:57,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:57,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225632130] [2021-07-13 19:25:57,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225632130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:57,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137579796] [2021-07-13 19:25:57,124 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 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 19:25:57,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:25:57,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:57,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137579796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:57,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:57,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-07-13 19:25:57,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467145438] [2021-07-13 19:25:57,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:25:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:25:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:57,244 INFO L87 Difference]: Start difference. First operand 477 states and 1079 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:57,761 INFO L93 Difference]: Finished difference Result 822 states and 1640 transitions. [2021-07-13 19:25:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:25:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:25:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:57,764 INFO L225 Difference]: With dead ends: 822 [2021-07-13 19:25:57,764 INFO L226 Difference]: Without dead ends: 816 [2021-07-13 19:25:57,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:25:57,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-07-13 19:25:57,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 477. [2021-07-13 19:25:57,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.264705882352941) internal successors, (1078), 476 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1078 transitions. [2021-07-13 19:25:57,771 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1078 transitions. Word has length 25 [2021-07-13 19:25:57,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:57,771 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1078 transitions. [2021-07-13 19:25:57,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:57,771 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1078 transitions. [2021-07-13 19:25:57,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:57,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:57,772 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:57,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:25:57,983 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:57,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:57,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1599049990, now seen corresponding path program 46 times [2021-07-13 19:25:57,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:57,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610634409] [2021-07-13 19:25:57,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:58,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:58,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610634409] [2021-07-13 19:25:58,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610634409] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:58,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050369430] [2021-07-13 19:25:58,010 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:25:58,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:25:58,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:25:58,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:58,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:58,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050369430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:58,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:58,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-07-13 19:25:58,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643766815] [2021-07-13 19:25:58,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:25:58,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:58,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:25:58,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:58,129 INFO L87 Difference]: Start difference. First operand 477 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 19:25:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:58,758 INFO L93 Difference]: Finished difference Result 994 states and 1984 transitions. [2021-07-13 19:25:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:25:58,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-07-13 19:25:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:58,761 INFO L225 Difference]: With dead ends: 994 [2021-07-13 19:25:58,761 INFO L226 Difference]: Without dead ends: 994 [2021-07-13 19:25:58,762 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 406.2ms TimeCoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:25:58,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-07-13 19:25:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 478. [2021-07-13 19:25:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.2641509433962264) internal successors, (1080), 477 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1080 transitions. [2021-07-13 19:25:58,769 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1080 transitions. Word has length 25 [2021-07-13 19:25:58,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:58,769 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1080 transitions. [2021-07-13 19:25:58,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 19:25:58,769 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1080 transitions. [2021-07-13 19:25:58,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:58,770 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:58,770 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:58,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:25:58,984 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:58,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:58,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1312019224, now seen corresponding path program 47 times [2021-07-13 19:25:58,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:58,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730816714] [2021-07-13 19:25:58,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:25:59,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:59,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730816714] [2021-07-13 19:25:59,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730816714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:59,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118705223] [2021-07-13 19:25:59,012 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:25:59,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:25:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:59,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:25:59,143 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:59,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118705223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:59,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:25:59,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-07-13 19:25:59,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93784027] [2021-07-13 19:25:59,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:25:59,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:25:59,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:25:59,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:25:59,144 INFO L87 Difference]: Start difference. First operand 478 states and 1080 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 19:25:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:25:59,692 INFO L93 Difference]: Finished difference Result 891 states and 1769 transitions. [2021-07-13 19:25:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:25:59,693 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-07-13 19:25:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:25:59,695 INFO L225 Difference]: With dead ends: 891 [2021-07-13 19:25:59,695 INFO L226 Difference]: Without dead ends: 887 [2021-07-13 19:25:59,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:25:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-07-13 19:25:59,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 480. [2021-07-13 19:25:59,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.258872651356994) internal successors, (1082), 479 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:25:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1082 transitions. [2021-07-13 19:25:59,703 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1082 transitions. Word has length 25 [2021-07-13 19:25:59,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:25:59,703 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1082 transitions. [2021-07-13 19:25:59,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 19:25:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1082 transitions. [2021-07-13 19:25:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:25:59,704 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:25:59,704 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:25:59,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:59,909 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:25:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:25:59,910 INFO L82 PathProgramCache]: Analyzing trace with hash -504958402, now seen corresponding path program 48 times [2021-07-13 19:25:59,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:25:59,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958124190] [2021-07-13 19:25:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:25:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:25:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:25:59,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:25:59,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958124190] [2021-07-13 19:25:59,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958124190] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:25:59,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497219240] [2021-07-13 19:25:59,941 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:25:59,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:25:59,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:25:59,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:25:59,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:00,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497219240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:00,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:00,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:26:00,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876345784] [2021-07-13 19:26:00,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:00,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:00,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:00,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:00,067 INFO L87 Difference]: Start difference. First operand 480 states and 1082 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:00,841 INFO L93 Difference]: Finished difference Result 903 states and 1798 transitions. [2021-07-13 19:26:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-13 19:26:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:00,844 INFO L225 Difference]: With dead ends: 903 [2021-07-13 19:26:00,844 INFO L226 Difference]: Without dead ends: 903 [2021-07-13 19:26:00,844 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 535.9ms TimeCoverageRelationStatistics Valid=513, Invalid=2679, Unknown=0, NotChecked=0, Total=3192 [2021-07-13 19:26:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-07-13 19:26:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 464. [2021-07-13 19:26:00,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.239740820734341) internal successors, (1037), 463 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1037 transitions. [2021-07-13 19:26:00,851 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1037 transitions. Word has length 25 [2021-07-13 19:26:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:00,851 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1037 transitions. [2021-07-13 19:26:00,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1037 transitions. [2021-07-13 19:26:00,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:00,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:00,852 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:01,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:01,056 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:01,056 INFO L82 PathProgramCache]: Analyzing trace with hash 805672958, now seen corresponding path program 49 times [2021-07-13 19:26:01,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:01,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14154224] [2021-07-13 19:26:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:01,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14154224] [2021-07-13 19:26:01,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14154224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:01,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103243186] [2021-07-13 19:26:01,090 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 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 19:26:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:01,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103243186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:01,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:26:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473541370] [2021-07-13 19:26:01,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:01,229 INFO L87 Difference]: Start difference. First operand 464 states and 1037 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:01,798 INFO L93 Difference]: Finished difference Result 827 states and 1634 transitions. [2021-07-13 19:26:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:26:01,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:01,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:01,801 INFO L225 Difference]: With dead ends: 827 [2021-07-13 19:26:01,801 INFO L226 Difference]: Without dead ends: 821 [2021-07-13 19:26:01,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:26:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-07-13 19:26:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 468. [2021-07-13 19:26:01,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.233404710920771) internal successors, (1043), 467 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1043 transitions. [2021-07-13 19:26:01,807 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1043 transitions. Word has length 25 [2021-07-13 19:26:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:01,807 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1043 transitions. [2021-07-13 19:26:01,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:01,807 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1043 transitions. [2021-07-13 19:26:01,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:01,808 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:01,808 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:02,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 19:26:02,008 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:02,009 INFO L82 PathProgramCache]: Analyzing trace with hash -306061006, now seen corresponding path program 50 times [2021-07-13 19:26:02,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:02,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867168205] [2021-07-13 19:26:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:02,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867168205] [2021-07-13 19:26:02,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867168205] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564996930] [2021-07-13 19:26:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:26:02,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:02,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:02,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:02,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564996930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:02,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:02,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 19:26:02,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175769493] [2021-07-13 19:26:02,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:02,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:02,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:02,171 INFO L87 Difference]: Start difference. First operand 468 states and 1043 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 19:26:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:02,860 INFO L93 Difference]: Finished difference Result 1176 states and 2324 transitions. [2021-07-13 19:26:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:26:02,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 25 [2021-07-13 19:26:02,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:02,863 INFO L225 Difference]: With dead ends: 1176 [2021-07-13 19:26:02,863 INFO L226 Difference]: Without dead ends: 1176 [2021-07-13 19:26:02,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 19:26:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-07-13 19:26:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 469. [2021-07-13 19:26:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.232905982905983) internal successors, (1045), 468 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1045 transitions. [2021-07-13 19:26:02,872 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1045 transitions. Word has length 25 [2021-07-13 19:26:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:02,872 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1045 transitions. [2021-07-13 19:26:02,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 19:26:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1045 transitions. [2021-07-13 19:26:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:02,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:02,873 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:03,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:03,077 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash 396744302, now seen corresponding path program 51 times [2021-07-13 19:26:03,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:03,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233601864] [2021-07-13 19:26:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:03,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:03,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233601864] [2021-07-13 19:26:03,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233601864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444217037] [2021-07-13 19:26:03,109 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:03,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-13 19:26:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:03,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:03,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444217037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:03,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:03,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 19:26:03,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386083102] [2021-07-13 19:26:03,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:03,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:03,249 INFO L87 Difference]: Start difference. First operand 469 states and 1045 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:03,854 INFO L93 Difference]: Finished difference Result 823 states and 1624 transitions. [2021-07-13 19:26:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:26:03,854 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:03,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:03,856 INFO L225 Difference]: With dead ends: 823 [2021-07-13 19:26:03,856 INFO L226 Difference]: Without dead ends: 817 [2021-07-13 19:26:03,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:26:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-07-13 19:26:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 469. [2021-07-13 19:26:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.230769230769231) internal successors, (1044), 468 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1044 transitions. [2021-07-13 19:26:03,863 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1044 transitions. Word has length 25 [2021-07-13 19:26:03,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:03,863 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1044 transitions. [2021-07-13 19:26:03,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:03,863 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1044 transitions. [2021-07-13 19:26:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:03,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:03,864 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:04,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:26:04,064 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -868183558, now seen corresponding path program 52 times [2021-07-13 19:26:04,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:04,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56700485] [2021-07-13 19:26:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:04,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:04,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:04,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56700485] [2021-07-13 19:26:04,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56700485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582191240] [2021-07-13 19:26:04,098 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 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 19:26:04,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:04,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:04,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:04,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:04,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582191240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:04,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:04,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 19:26:04,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091218099] [2021-07-13 19:26:04,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:04,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:04,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:04,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:04,251 INFO L87 Difference]: Start difference. First operand 469 states and 1044 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:05,175 INFO L93 Difference]: Finished difference Result 1066 states and 2098 transitions. [2021-07-13 19:26:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:26:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:05,176 INFO L225 Difference]: With dead ends: 1066 [2021-07-13 19:26:05,176 INFO L226 Difference]: Without dead ends: 1066 [2021-07-13 19:26:05,177 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 551.3ms TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2021-07-13 19:26:05,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-07-13 19:26:05,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 470. [2021-07-13 19:26:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.230277185501066) internal successors, (1046), 469 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1046 transitions. [2021-07-13 19:26:05,184 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1046 transitions. Word has length 25 [2021-07-13 19:26:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:05,184 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1046 transitions. [2021-07-13 19:26:05,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1046 transitions. [2021-07-13 19:26:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:05,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:05,185 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:05,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 19:26:05,385 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2042885656, now seen corresponding path program 53 times [2021-07-13 19:26:05,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:05,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556848715] [2021-07-13 19:26:05,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:05,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:05,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556848715] [2021-07-13 19:26:05,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556848715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:05,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141666092] [2021-07-13 19:26:05,421 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 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 19:26:05,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 19:26:05,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:05,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:05,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:05,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141666092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:05,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:05,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-07-13 19:26:05,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231474919] [2021-07-13 19:26:05,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:05,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:05,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:05,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:05,545 INFO L87 Difference]: Start difference. First operand 470 states and 1046 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:06,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:06,107 INFO L93 Difference]: Finished difference Result 912 states and 1823 transitions. [2021-07-13 19:26:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:26:06,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:06,109 INFO L225 Difference]: With dead ends: 912 [2021-07-13 19:26:06,109 INFO L226 Difference]: Without dead ends: 908 [2021-07-13 19:26:06,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 322.9ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:26:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-07-13 19:26:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 470. [2021-07-13 19:26:06,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.228144989339019) internal successors, (1045), 469 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:06,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1045 transitions. [2021-07-13 19:26:06,115 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1045 transitions. Word has length 25 [2021-07-13 19:26:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:06,115 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1045 transitions. [2021-07-13 19:26:06,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:06,116 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1045 transitions. [2021-07-13 19:26:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:06,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:06,116 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:06,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:26:06,317 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash 225908030, now seen corresponding path program 54 times [2021-07-13 19:26:06,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:06,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809428437] [2021-07-13 19:26:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:06,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:06,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809428437] [2021-07-13 19:26:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809428437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:06,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306346706] [2021-07-13 19:26:06,353 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:06,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 19:26:06,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:06,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:06,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306346706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:06,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:06,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:26:06,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121498804] [2021-07-13 19:26:06,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:26:06,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:26:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:06,483 INFO L87 Difference]: Start difference. First operand 470 states and 1045 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:08,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:08,055 INFO L93 Difference]: Finished difference Result 1348 states and 2688 transitions. [2021-07-13 19:26:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 19:26:08,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:08,057 INFO L225 Difference]: With dead ends: 1348 [2021-07-13 19:26:08,057 INFO L226 Difference]: Without dead ends: 1348 [2021-07-13 19:26:08,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 1020.8ms TimeCoverageRelationStatistics Valid=1189, Invalid=5783, Unknown=0, NotChecked=0, Total=6972 [2021-07-13 19:26:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-07-13 19:26:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 472. [2021-07-13 19:26:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2271762208067942) internal successors, (1049), 471 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1049 transitions. [2021-07-13 19:26:08,066 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1049 transitions. Word has length 25 [2021-07-13 19:26:08,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:08,066 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1049 transitions. [2021-07-13 19:26:08,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:08,066 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1049 transitions. [2021-07-13 19:26:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:08,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:08,067 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:08,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:26:08,268 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:08,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:08,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1536539390, now seen corresponding path program 55 times [2021-07-13 19:26:08,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:08,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091628833] [2021-07-13 19:26:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:08,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:08,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091628833] [2021-07-13 19:26:08,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091628833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:08,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331621904] [2021-07-13 19:26:08,313 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 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 19:26:08,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:08,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:08,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331621904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:08,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:08,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-07-13 19:26:08,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271687153] [2021-07-13 19:26:08,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:26:08,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:08,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:26:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:26:08,444 INFO L87 Difference]: Start difference. First operand 472 states and 1049 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:09,031 INFO L93 Difference]: Finished difference Result 861 states and 1700 transitions. [2021-07-13 19:26:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:26:09,031 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:09,033 INFO L225 Difference]: With dead ends: 861 [2021-07-13 19:26:09,033 INFO L226 Difference]: Without dead ends: 841 [2021-07-13 19:26:09,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:26:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-07-13 19:26:09,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 472. [2021-07-13 19:26:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2229299363057327) internal successors, (1047), 471 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1047 transitions. [2021-07-13 19:26:09,040 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1047 transitions. Word has length 25 [2021-07-13 19:26:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:09,040 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1047 transitions. [2021-07-13 19:26:09,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1047 transitions. [2021-07-13 19:26:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:09,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:09,041 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:09,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:09,249 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:09,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:09,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1504861702, now seen corresponding path program 56 times [2021-07-13 19:26:09,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:09,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231307846] [2021-07-13 19:26:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:09,286 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:09,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:09,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231307846] [2021-07-13 19:26:09,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231307846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:09,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597772067] [2021-07-13 19:26:09,286 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 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 19:26:09,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:09,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:09,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:09,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:09,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597772067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:09,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:09,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:26:09,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646290617] [2021-07-13 19:26:09,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:26:09,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:09,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:26:09,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:09,420 INFO L87 Difference]: Start difference. First operand 472 states and 1047 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 19:26:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:10,999 INFO L93 Difference]: Finished difference Result 984 states and 1997 transitions. [2021-07-13 19:26:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-07-13 19:26:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 25 [2021-07-13 19:26:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:11,001 INFO L225 Difference]: With dead ends: 984 [2021-07-13 19:26:11,001 INFO L226 Difference]: Without dead ends: 982 [2021-07-13 19:26:11,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1090.3ms TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2021-07-13 19:26:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-07-13 19:26:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 436. [2021-07-13 19:26:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.197701149425287) internal successors, (956), 435 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 956 transitions. [2021-07-13 19:26:11,008 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 956 transitions. Word has length 25 [2021-07-13 19:26:11,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:11,008 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 956 transitions. [2021-07-13 19:26:11,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 19:26:11,008 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 956 transitions. [2021-07-13 19:26:11,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:11,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:11,009 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:11,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:26:11,217 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:11,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1309318010, now seen corresponding path program 57 times [2021-07-13 19:26:11,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:11,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189799392] [2021-07-13 19:26:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:11,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:11,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189799392] [2021-07-13 19:26:11,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189799392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:11,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550801983] [2021-07-13 19:26:11,260 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:26:11,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 19:26:11,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:11,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:11,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550801983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:11,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:11,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:26:11,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904201541] [2021-07-13 19:26:11,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:26:11,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:11,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:26:11,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:11,403 INFO L87 Difference]: Start difference. First operand 436 states and 956 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 19:26:11,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:11,904 INFO L93 Difference]: Finished difference Result 695 states and 1377 transitions. [2021-07-13 19:26:11,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 19:26:11,904 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 25 [2021-07-13 19:26:11,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:11,912 INFO L225 Difference]: With dead ends: 695 [2021-07-13 19:26:11,912 INFO L226 Difference]: Without dead ends: 685 [2021-07-13 19:26:11,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:26:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-07-13 19:26:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 436. [2021-07-13 19:26:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.193103448275862) internal successors, (954), 435 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 954 transitions. [2021-07-13 19:26:11,918 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 954 transitions. Word has length 25 [2021-07-13 19:26:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:11,918 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 954 transitions. [2021-07-13 19:26:11,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 19:26:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 954 transitions. [2021-07-13 19:26:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:11,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:11,919 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:12,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:12,119 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:12,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1091186638, now seen corresponding path program 58 times [2021-07-13 19:26:12,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:12,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72667026] [2021-07-13 19:26:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:12,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72667026] [2021-07-13 19:26:12,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72667026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:12,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929160091] [2021-07-13 19:26:12,164 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 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 19:26:12,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:12,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:12,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:12,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:12,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929160091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:12,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:12,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:26:12,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204479459] [2021-07-13 19:26:12,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:26:12,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:12,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:26:12,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:12,311 INFO L87 Difference]: Start difference. First operand 436 states and 954 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:13,838 INFO L93 Difference]: Finished difference Result 1039 states and 2080 transitions. [2021-07-13 19:26:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-13 19:26:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:13,840 INFO L225 Difference]: With dead ends: 1039 [2021-07-13 19:26:13,840 INFO L226 Difference]: Without dead ends: 1039 [2021-07-13 19:26:13,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1059.4ms TimeCoverageRelationStatistics Valid=950, Invalid=4306, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:26:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-07-13 19:26:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 402. [2021-07-13 19:26:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.1596009975062342) internal successors, (866), 401 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 866 transitions. [2021-07-13 19:26:13,847 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 866 transitions. Word has length 25 [2021-07-13 19:26:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:13,847 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 866 transitions. [2021-07-13 19:26:13,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 866 transitions. [2021-07-13 19:26:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:13,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:13,848 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:14,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 19:26:14,048 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1088108690, now seen corresponding path program 59 times [2021-07-13 19:26:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:14,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214189913] [2021-07-13 19:26:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:14,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:14,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:14,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214189913] [2021-07-13 19:26:14,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214189913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:14,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265512202] [2021-07-13 19:26:14,093 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 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 19:26:14,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:26:14,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:14,235 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:14,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265512202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:14,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:14,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:26:14,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024610422] [2021-07-13 19:26:14,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:26:14,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:14,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:26:14,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:26:14,236 INFO L87 Difference]: Start difference. First operand 402 states and 866 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:14,855 INFO L93 Difference]: Finished difference Result 548 states and 1068 transitions. [2021-07-13 19:26:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:26:14,855 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:14,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:14,856 INFO L225 Difference]: With dead ends: 548 [2021-07-13 19:26:14,856 INFO L226 Difference]: Without dead ends: 518 [2021-07-13 19:26:14,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=310, Invalid=1582, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:26:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-13 19:26:14,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 381. [2021-07-13 19:26:14,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.168421052631579) internal successors, (824), 380 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 824 transitions. [2021-07-13 19:26:14,861 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 824 transitions. Word has length 25 [2021-07-13 19:26:14,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:14,861 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 824 transitions. [2021-07-13 19:26:14,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:14,861 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 824 transitions. [2021-07-13 19:26:14,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:14,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:14,862 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:15,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:15,065 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1258665422, now seen corresponding path program 60 times [2021-07-13 19:26:15,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:15,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264103849] [2021-07-13 19:26:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:15,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:15,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264103849] [2021-07-13 19:26:15,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264103849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:15,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025101747] [2021-07-13 19:26:15,134 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 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 19:26:15,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:15,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:15,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:15,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:15,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025101747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:15,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:15,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:26:15,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421419854] [2021-07-13 19:26:15,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:15,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:15,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:15,258 INFO L87 Difference]: Start difference. First operand 381 states and 824 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:15,972 INFO L93 Difference]: Finished difference Result 749 states and 1476 transitions. [2021-07-13 19:26:15,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-13 19:26:15,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:15,974 INFO L225 Difference]: With dead ends: 749 [2021-07-13 19:26:15,974 INFO L226 Difference]: Without dead ends: 749 [2021-07-13 19:26:15,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=498, Invalid=2582, Unknown=0, NotChecked=0, Total=3080 [2021-07-13 19:26:15,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-07-13 19:26:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 375. [2021-07-13 19:26:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.1550802139037435) internal successors, (806), 374 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 806 transitions. [2021-07-13 19:26:15,979 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 806 transitions. Word has length 25 [2021-07-13 19:26:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:15,979 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 806 transitions. [2021-07-13 19:26:15,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 806 transitions. [2021-07-13 19:26:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:15,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:15,980 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:16,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 19:26:16,185 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:16,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:16,185 INFO L82 PathProgramCache]: Analyzing trace with hash -172629906, now seen corresponding path program 61 times [2021-07-13 19:26:16,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:16,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170456434] [2021-07-13 19:26:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:16,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:16,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170456434] [2021-07-13 19:26:16,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170456434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:16,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538292126] [2021-07-13 19:26:16,221 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:16,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538292126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:16,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:16,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:26:16,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582201877] [2021-07-13 19:26:16,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:16,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:16,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:16,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:16,343 INFO L87 Difference]: Start difference. First operand 375 states and 806 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 19:26:16,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:16,883 INFO L93 Difference]: Finished difference Result 567 states and 1087 transitions. [2021-07-13 19:26:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:26:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 25 [2021-07-13 19:26:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:16,884 INFO L225 Difference]: With dead ends: 567 [2021-07-13 19:26:16,884 INFO L226 Difference]: Without dead ends: 558 [2021-07-13 19:26:16,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 19:26:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-07-13 19:26:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2021-07-13 19:26:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.161559888579387) internal successors, (776), 359 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:16,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 776 transitions. [2021-07-13 19:26:16,889 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 776 transitions. Word has length 25 [2021-07-13 19:26:16,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:16,889 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 776 transitions. [2021-07-13 19:26:16,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 19:26:16,889 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 776 transitions. [2021-07-13 19:26:16,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:16,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:16,890 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:17,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:17,105 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:17,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1976910898, now seen corresponding path program 62 times [2021-07-13 19:26:17,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:17,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670514664] [2021-07-13 19:26:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:17,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:17,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670514664] [2021-07-13 19:26:17,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670514664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:17,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422700163] [2021-07-13 19:26:17,131 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 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 19:26:17,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:17,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:17,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422700163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:17,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:17,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-07-13 19:26:17,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787018006] [2021-07-13 19:26:17,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:17,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:17,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:17,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:17,237 INFO L87 Difference]: Start difference. First operand 360 states and 776 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:17,708 INFO L93 Difference]: Finished difference Result 680 states and 1310 transitions. [2021-07-13 19:26:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-13 19:26:17,709 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:17,710 INFO L225 Difference]: With dead ends: 680 [2021-07-13 19:26:17,710 INFO L226 Difference]: Without dead ends: 680 [2021-07-13 19:26:17,712 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:26:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-07-13 19:26:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 360. [2021-07-13 19:26:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.1587743732590527) internal successors, (775), 359 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 775 transitions. [2021-07-13 19:26:17,717 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 775 transitions. Word has length 25 [2021-07-13 19:26:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:17,717 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 775 transitions. [2021-07-13 19:26:17,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:17,717 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 775 transitions. [2021-07-13 19:26:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:17,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:17,718 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:17,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:26:17,918 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:17,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1615251090, now seen corresponding path program 63 times [2021-07-13 19:26:17,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:17,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910423515] [2021-07-13 19:26:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:17,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910423515] [2021-07-13 19:26:17,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910423515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:17,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930133953] [2021-07-13 19:26:17,949 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 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 19:26:17,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:26:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:17,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:18,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930133953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:18,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:18,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-07-13 19:26:18,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008905715] [2021-07-13 19:26:18,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:18,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:18,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:18,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:18,051 INFO L87 Difference]: Start difference. First operand 360 states and 775 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 19:26:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:18,364 INFO L93 Difference]: Finished difference Result 441 states and 888 transitions. [2021-07-13 19:26:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:26:18,365 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 25 [2021-07-13 19:26:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:18,366 INFO L225 Difference]: With dead ends: 441 [2021-07-13 19:26:18,366 INFO L226 Difference]: Without dead ends: 438 [2021-07-13 19:26:18,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:26:18,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-07-13 19:26:18,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 357. [2021-07-13 19:26:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.1601123595505616) internal successors, (769), 356 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:18,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 769 transitions. [2021-07-13 19:26:18,369 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 769 transitions. Word has length 25 [2021-07-13 19:26:18,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:18,370 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 769 transitions. [2021-07-13 19:26:18,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 19:26:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 769 transitions. [2021-07-13 19:26:18,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:18,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:18,370 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:18,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:18,571 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:18,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1414788346, now seen corresponding path program 64 times [2021-07-13 19:26:18,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:18,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825539181] [2021-07-13 19:26:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:18,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:18,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825539181] [2021-07-13 19:26:18,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825539181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553404233] [2021-07-13 19:26:18,598 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 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 19:26:18,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:18,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:18,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:18,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:18,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553404233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:18,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:18,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-07-13 19:26:18,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905183096] [2021-07-13 19:26:18,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:18,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:18,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:18,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:18,709 INFO L87 Difference]: Start difference. First operand 357 states and 769 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:19,217 INFO L93 Difference]: Finished difference Result 498 states and 1005 transitions. [2021-07-13 19:26:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:26:19,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:19,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:19,218 INFO L225 Difference]: With dead ends: 498 [2021-07-13 19:26:19,218 INFO L226 Difference]: Without dead ends: 498 [2021-07-13 19:26:19,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:26:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-07-13 19:26:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 358. [2021-07-13 19:26:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.1596638655462184) internal successors, (771), 357 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 771 transitions. [2021-07-13 19:26:19,222 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 771 transitions. Word has length 25 [2021-07-13 19:26:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:19,222 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 771 transitions. [2021-07-13 19:26:19,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 771 transitions. [2021-07-13 19:26:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:19,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:19,223 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:19,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 19:26:19,441 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:19,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:19,441 INFO L82 PathProgramCache]: Analyzing trace with hash 30890264, now seen corresponding path program 65 times [2021-07-13 19:26:19,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:19,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809007423] [2021-07-13 19:26:19,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:19,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809007423] [2021-07-13 19:26:19,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809007423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625015799] [2021-07-13 19:26:19,468 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 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 19:26:19,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:19,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:19,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625015799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:19,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:19,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-07-13 19:26:19,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8832000] [2021-07-13 19:26:19,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:26:19,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:19,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:26:19,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:26:19,576 INFO L87 Difference]: Start difference. First operand 358 states and 771 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:19,988 INFO L93 Difference]: Finished difference Result 633 states and 1215 transitions. [2021-07-13 19:26:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:26:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:19,989 INFO L225 Difference]: With dead ends: 633 [2021-07-13 19:26:19,989 INFO L226 Difference]: Without dead ends: 631 [2021-07-13 19:26:19,990 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:26:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-07-13 19:26:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 358. [2021-07-13 19:26:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.156862745098039) internal successors, (770), 357 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 770 transitions. [2021-07-13 19:26:19,994 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 770 transitions. Word has length 25 [2021-07-13 19:26:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:19,994 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 770 transitions. [2021-07-13 19:26:19,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 770 transitions. [2021-07-13 19:26:19,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:19,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:19,995 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:20,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:26:20,212 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:20,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1786087362, now seen corresponding path program 66 times [2021-07-13 19:26:20,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:20,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624630698] [2021-07-13 19:26:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:20,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:20,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624630698] [2021-07-13 19:26:20,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624630698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:20,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369407893] [2021-07-13 19:26:20,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:26:20,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:20,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:20,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:20,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369407893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:20,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:20,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-07-13 19:26:20,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234654839] [2021-07-13 19:26:20,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:20,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:20,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:20,350 INFO L87 Difference]: Start difference. First operand 358 states and 770 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 19:26:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:21,671 INFO L93 Difference]: Finished difference Result 741 states and 1512 transitions. [2021-07-13 19:26:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 19:26:21,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-07-13 19:26:21,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:21,672 INFO L225 Difference]: With dead ends: 741 [2021-07-13 19:26:21,672 INFO L226 Difference]: Without dead ends: 741 [2021-07-13 19:26:21,673 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 912.6ms TimeCoverageRelationStatistics Valid=1079, Invalid=5241, Unknown=0, NotChecked=0, Total=6320 [2021-07-13 19:26:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-07-13 19:26:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 362. [2021-07-13 19:26:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-07-13 19:26:21,677 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 25 [2021-07-13 19:26:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:21,677 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-07-13 19:26:21,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 19:26:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-07-13 19:26:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:21,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:21,678 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:21,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:26:21,878 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:21,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:21,879 INFO L82 PathProgramCache]: Analyzing trace with hash -475456002, now seen corresponding path program 67 times [2021-07-13 19:26:21,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:21,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807208928] [2021-07-13 19:26:21,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:21,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:21,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807208928] [2021-07-13 19:26:21,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807208928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:21,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344485295] [2021-07-13 19:26:21,914 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 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 19:26:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:21,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:22,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344485295] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:22,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:22,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-07-13 19:26:22,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293430326] [2021-07-13 19:26:22,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:26:22,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:22,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:26:22,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:26:22,024 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 19:26:22,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:22,657 INFO L93 Difference]: Finished difference Result 727 states and 1360 transitions. [2021-07-13 19:26:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-13 19:26:22,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-07-13 19:26:22,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:22,658 INFO L225 Difference]: With dead ends: 727 [2021-07-13 19:26:22,658 INFO L226 Difference]: Without dead ends: 707 [2021-07-13 19:26:22,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2021-07-13 19:26:22,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-07-13 19:26:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 362. [2021-07-13 19:26:22,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.14404432132964) internal successors, (774), 361 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 774 transitions. [2021-07-13 19:26:22,663 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 774 transitions. Word has length 25 [2021-07-13 19:26:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:22,663 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 774 transitions. [2021-07-13 19:26:22,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 19:26:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 774 transitions. [2021-07-13 19:26:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:22,664 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:22,664 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:22,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:22,865 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash 778110202, now seen corresponding path program 68 times [2021-07-13 19:26:22,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:22,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822622299] [2021-07-13 19:26:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:22,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:22,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822622299] [2021-07-13 19:26:22,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822622299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:22,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426247460] [2021-07-13 19:26:22,910 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:26:22,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:26:22,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:22,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:22,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:23,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426247460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:23,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:23,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:26:23,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081910852] [2021-07-13 19:26:23,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:23,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:23,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:23,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:23,026 INFO L87 Difference]: Start difference. First operand 362 states and 774 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:24,999 INFO L93 Difference]: Finished difference Result 856 states and 1795 transitions. [2021-07-13 19:26:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-13 19:26:24,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:24,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:25,001 INFO L225 Difference]: With dead ends: 856 [2021-07-13 19:26:25,001 INFO L226 Difference]: Without dead ends: 852 [2021-07-13 19:26:25,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 1485.4ms TimeCoverageRelationStatistics Valid=1807, Invalid=7895, Unknown=0, NotChecked=0, Total=9702 [2021-07-13 19:26:25,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-07-13 19:26:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 366. [2021-07-13 19:26:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.1424657534246574) internal successors, (782), 365 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 782 transitions. [2021-07-13 19:26:25,007 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 782 transitions. Word has length 25 [2021-07-13 19:26:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:25,008 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 782 transitions. [2021-07-13 19:26:25,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 782 transitions. [2021-07-13 19:26:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:25,008 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:25,008 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:25,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:25,225 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:25,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:25,225 INFO L82 PathProgramCache]: Analyzing trace with hash -702677382, now seen corresponding path program 69 times [2021-07-13 19:26:25,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:25,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432721705] [2021-07-13 19:26:25,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:25,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:26:25,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:25,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432721705] [2021-07-13 19:26:25,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432721705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:25,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921302306] [2021-07-13 19:26:25,262 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 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 19:26:25,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:26:25,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:25,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:25,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:25,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:25,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921302306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:25,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:25,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-07-13 19:26:25,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371276984] [2021-07-13 19:26:25,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:25,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:25,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:25,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:25,372 INFO L87 Difference]: Start difference. First operand 366 states and 782 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:26,106 INFO L93 Difference]: Finished difference Result 718 states and 1344 transitions. [2021-07-13 19:26:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-13 19:26:26,107 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:26,108 INFO L225 Difference]: With dead ends: 718 [2021-07-13 19:26:26,108 INFO L226 Difference]: Without dead ends: 688 [2021-07-13 19:26:26,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 581.5ms TimeCoverageRelationStatistics Valid=555, Invalid=2751, Unknown=0, NotChecked=0, Total=3306 [2021-07-13 19:26:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-07-13 19:26:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 368. [2021-07-13 19:26:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.128065395095368) internal successors, (781), 367 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 781 transitions. [2021-07-13 19:26:26,114 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 781 transitions. Word has length 25 [2021-07-13 19:26:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:26,114 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 781 transitions. [2021-07-13 19:26:26,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 781 transitions. [2021-07-13 19:26:26,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:26,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:26,115 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:26,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:26,331 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:26,331 INFO L82 PathProgramCache]: Analyzing trace with hash -339258698, now seen corresponding path program 70 times [2021-07-13 19:26:26,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:26,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808923861] [2021-07-13 19:26:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:26,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808923861] [2021-07-13 19:26:26,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808923861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852207367] [2021-07-13 19:26:26,368 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 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 19:26:26,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:26:26,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:26,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:26,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:26,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852207367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:26,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:26,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:26:26,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260976257] [2021-07-13 19:26:26,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:26,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:26,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:26,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:26,490 INFO L87 Difference]: Start difference. First operand 368 states and 781 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:28,027 INFO L93 Difference]: Finished difference Result 714 states and 1495 transitions. [2021-07-13 19:26:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-13 19:26:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:28,029 INFO L225 Difference]: With dead ends: 714 [2021-07-13 19:26:28,029 INFO L226 Difference]: Without dead ends: 704 [2021-07-13 19:26:28,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1111.2ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-07-13 19:26:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-07-13 19:26:28,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 355. [2021-07-13 19:26:28,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.132768361581921) internal successors, (755), 354 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 755 transitions. [2021-07-13 19:26:28,034 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 755 transitions. Word has length 25 [2021-07-13 19:26:28,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:28,034 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 755 transitions. [2021-07-13 19:26:28,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,035 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 755 transitions. [2021-07-13 19:26:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-13 19:26:28,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:28,035 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:28,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 19:26:28,246 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash -19091466, now seen corresponding path program 71 times [2021-07-13 19:26:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:28,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690192238] [2021-07-13 19:26:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:28,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:28,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690192238] [2021-07-13 19:26:28,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690192238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:28,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918444888] [2021-07-13 19:26:28,291 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 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 19:26:28,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:26:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:28,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:26:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:26:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:28,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918444888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:28,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:26:28,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-13 19:26:28,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825835148] [2021-07-13 19:26:28,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:26:28,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:26:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:26:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:26:28,399 INFO L87 Difference]: Start difference. First operand 355 states and 755 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:26:28,851 INFO L93 Difference]: Finished difference Result 532 states and 1030 transitions. [2021-07-13 19:26:28,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:26:28,851 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-07-13 19:26:28,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:26:28,852 INFO L225 Difference]: With dead ends: 532 [2021-07-13 19:26:28,852 INFO L226 Difference]: Without dead ends: 518 [2021-07-13 19:26:28,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 392.0ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:26:28,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-07-13 19:26:28,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 355. [2021-07-13 19:26:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.121468926553672) internal successors, (751), 354 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 751 transitions. [2021-07-13 19:26:28,857 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 751 transitions. Word has length 25 [2021-07-13 19:26:28,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:26:28,857 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 751 transitions. [2021-07-13 19:26:28,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:26:28,857 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 751 transitions. [2021-07-13 19:26:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:26:28,857 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:26:28,857 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:26:29,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:26:29,073 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:26:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:26:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1769779472, now seen corresponding path program 72 times [2021-07-13 19:26:29,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:26:29,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767214062] [2021-07-13 19:26:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:26:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:26:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:26:29,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:26:29,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767214062] [2021-07-13 19:26:29,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767214062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:26:29,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674726752] [2021-07-13 19:26:29,119 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 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 19:26:29,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:26:29,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:26:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 19:26:29,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-07-13 19:39:47,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:39:47,120 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 19:39:47,122 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:39:47,123 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 19:39:47,123 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:39:47 BasicIcfg [2021-07-13 19:39:47,123 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:39:47,124 INFO L168 Benchmark]: Toolchain (without parser) took 859059.78 ms. Allocated memory was 207.6 MB in the beginning and 1.2 GB in the end (delta: 952.1 MB). Free memory was 186.6 MB in the beginning and 387.7 MB in the end (delta: -201.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-07-13 19:39:47,124 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 207.6 MB. Free memory is still 187.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:39:47,124 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.43 ms. Allocated memory is still 207.6 MB. Free memory was 186.6 MB in the beginning and 185.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:39:47,124 INFO L168 Benchmark]: Boogie Preprocessor took 11.49 ms. Allocated memory is still 207.6 MB. Free memory was 185.1 MB in the beginning and 184.2 MB in the end (delta: 918.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:39:47,124 INFO L168 Benchmark]: RCFGBuilder took 177.94 ms. Allocated memory is still 207.6 MB. Free memory was 184.2 MB in the beginning and 174.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-07-13 19:39:47,124 INFO L168 Benchmark]: TraceAbstraction took 858842.22 ms. Allocated memory was 207.6 MB in the beginning and 1.2 GB in the end (delta: 952.1 MB). Free memory was 174.2 MB in the beginning and 387.7 MB in the end (delta: -213.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-07-13 19:39:47,124 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 0.10 ms. Allocated memory is still 207.6 MB. Free memory is still 187.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.43 ms. Allocated memory is still 207.6 MB. Free memory was 186.6 MB in the beginning and 185.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.49 ms. Allocated memory is still 207.6 MB. Free memory was 185.1 MB in the beginning and 184.2 MB in the end (delta: 918.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 177.94 ms. Allocated memory is still 207.6 MB. Free memory was 184.2 MB in the beginning and 174.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 858842.22 ms. Allocated memory was 207.6 MB in the beginning and 1.2 GB in the end (delta: 952.1 MB). Free memory was 174.2 MB in the beginning and 387.7 MB in the end (delta: -213.5 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 443 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 858763.0ms, OverallIterations: 76, TraceHistogramMax: 4, EmptinessCheckTime: 52.3ms, AutomataDifference: 34524.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 26.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2402 SDtfs, 8301 SDslu, 13273 SDs, 0 SdLazy, 25434 SolverSat, 1675 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11557.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3731 GetRequests, 1218 SyntacticMatches, 152 SemanticMatches, 2361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32165 ImplicationChecksByTransitivity, 23490.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=480occurred in iteration=51, InterpolantAutomatonStates: 2266, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 436.9ms AutomataMinimizationTime, 75 MinimizatonAttempts, 16752 StatesRemovedByMinimization, 75 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 135.6ms SsaConstructionTime, 525.1ms SatisfiabilityAnalysisTime, 8487.5ms InterpolantComputationTime, 3186 NumberOfCodeBlocks, 3186 NumberOfCodeBlocksAsserted, 280 NumberOfCheckSat, 3040 ConstructedInterpolants, 0 QuantifiedInterpolants, 16506 SizeOfPredicates, 203 NumberOfNonLiveVariables, 2812 ConjunctsInSsa, 581 ConjunctsInUnsatCore, 146 InterpolantComputations, 4 PerfectInterpolantSequences, 648/2422 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown