/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:16:36,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:16:36,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:16:36,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:16:36,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-09 18:16:36,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-09 18:16:36,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-09 18:16:36,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-09 18:16:36,790 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-09 18:16:36,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-09 18:16:36,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-09 18:16:36,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-09 18:16:36,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-09 18:16:36,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-09 18:16:36,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-09 18:16:36,808 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 [2021-07-09 18:16:36,843 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:16:36,843 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:16:36,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:16:36,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:16:36,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:16:36,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:16:36,846 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:16:36,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:16:36,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:16:36,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:16:36,847 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:16:36,847 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:16:36,847 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:16:36,847 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:16:36,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:16:36,847 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:16:36,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:16:36,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:16:36,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:16:36,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:16:36,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:16:36,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:16:36,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:16:36,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:16:36,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:16:36,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:16:36,849 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:16:36,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:16:36,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:16:36,849 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:16:36,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:16:36,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:16:37,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:16:37,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:16:37,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:16:37,101 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:16:37,102 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:16:37,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2021-07-09 18:16:37,102 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2021-07-09 18:16:37,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:16:37,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:16:37,267 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:16:37,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:16:37,268 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:16:37,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,288 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:16:37,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:16:37,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:16:37,290 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:16:37,295 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/1) ... [2021-07-09 18:16:37,302 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:16:37,303 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:16:37,303 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:16:37,303 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:16:37,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (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 [2021-07-09 18:16:37,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:16:37,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:16:37,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:16:37,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:16:37,349 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:16:37,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:16:37,349 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:16:37,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:16:37,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:16:37,350 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-09 18:16:37,350 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-09 18:16:37,351 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-09 18:16:37,351 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:16:37,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:16:37,720 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-07-09 18:16:37,720 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-09 18:16:37,720 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-07-09 18:16:37,721 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-07-09 18:16:37,722 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:16:37 BoogieIcfgContainer [2021-07-09 18:16:37,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:16:37,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:16:37,723 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:16:37,725 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:16:37,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:37" (1/2) ... [2021-07-09 18:16:37,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@151ebf36 and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:16:37, skipping insertion in model container [2021-07-09 18:16:37,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:16:37" (2/2) ... [2021-07-09 18:16:37,727 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2021-07-09 18:16:37,742 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:16:37,742 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:16:37,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:16:37,742 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:16:37,789 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-09 18:16:37,811 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-09 18:16:37,832 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:16:37,833 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:16:37,833 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:16:37,833 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:16:37,833 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:16:37,833 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:16:37,833 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:16:37,834 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:16:37,842 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 64 flow [2021-07-09 18:16:37,866 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:37,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-07-09 18:16:37,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:37,872 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:37,872 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:37,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:37,877 INFO L82 PathProgramCache]: Analyzing trace with hash -628206710, now seen corresponding path program 1 times [2021-07-09 18:16:37,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:37,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436656132] [2021-07-09 18:16:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:37,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:37,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436656132] [2021-07-09 18:16:37,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436656132] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:37,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:37,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:16:37,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053945811] [2021-07-09 18:16:37,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:16:37,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:37,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:16:37,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:37,986 INFO L87 Difference]: Start difference. First operand has 25 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:38,008 INFO L93 Difference]: Finished difference Result 46 states and 118 transitions. [2021-07-09 18:16:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:38,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-07-09 18:16:38,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:38,015 INFO L225 Difference]: With dead ends: 46 [2021-07-09 18:16:38,015 INFO L226 Difference]: Without dead ends: 42 [2021-07-09 18:16:38,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-07-09 18:16:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-07-09 18:16:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 109 transitions. [2021-07-09 18:16:38,037 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 109 transitions. Word has length 12 [2021-07-09 18:16:38,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:38,038 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 109 transitions. [2021-07-09 18:16:38,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 109 transitions. [2021-07-09 18:16:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 18:16:38,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:38,038 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:38,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:16:38,039 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:38,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 402586222, now seen corresponding path program 1 times [2021-07-09 18:16:38,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:38,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76333521] [2021-07-09 18:16:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:38,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:38,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76333521] [2021-07-09 18:16:38,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76333521] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:38,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:38,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:16:38,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491863141] [2021-07-09 18:16:38,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:16:38,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:38,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:16:38,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:38,089 INFO L87 Difference]: Start difference. First operand 42 states and 109 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:38,099 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2021-07-09 18:16:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:38,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 18:16:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:38,104 INFO L225 Difference]: With dead ends: 59 [2021-07-09 18:16:38,104 INFO L226 Difference]: Without dead ends: 57 [2021-07-09 18:16:38,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-07-09 18:16:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-07-09 18:16:38,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2021-07-09 18:16:38,112 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 13 [2021-07-09 18:16:38,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:38,112 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2021-07-09 18:16:38,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2021-07-09 18:16:38,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 18:16:38,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:38,113 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:38,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 18:16:38,113 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:38,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1959261122, now seen corresponding path program 1 times [2021-07-09 18:16:38,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:38,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248042148] [2021-07-09 18:16:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:38,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:38,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248042148] [2021-07-09 18:16:38,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248042148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:38,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18178284] [2021-07-09 18:16:38,161 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 [2021-07-09 18:16:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:38,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:16:38,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:38,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18178284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:38,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:38,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-09 18:16:38,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047498921] [2021-07-09 18:16:38,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:16:38,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:38,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:16:38,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:16:38,346 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:38,366 INFO L93 Difference]: Finished difference Result 65 states and 168 transitions. [2021-07-09 18:16:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:38,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:16:38,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:38,368 INFO L225 Difference]: With dead ends: 65 [2021-07-09 18:16:38,368 INFO L226 Difference]: Without dead ends: 59 [2021-07-09 18:16:38,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:16:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-07-09 18:16:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-07-09 18:16:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 52 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 141 transitions. [2021-07-09 18:16:38,374 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 141 transitions. Word has length 13 [2021-07-09 18:16:38,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:38,374 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 141 transitions. [2021-07-09 18:16:38,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,374 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 141 transitions. [2021-07-09 18:16:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-09 18:16:38,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:38,375 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:38,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-07-09 18:16:38,596 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:38,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1085270368, now seen corresponding path program 1 times [2021-07-09 18:16:38,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:38,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054393486] [2021-07-09 18:16:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:38,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:38,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054393486] [2021-07-09 18:16:38,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054393486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:38,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589870991] [2021-07-09 18:16:38,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-09 18:16:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:38,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589870991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:38,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:38,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-07-09 18:16:38,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397351894] [2021-07-09 18:16:38,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 18:16:38,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:38,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 18:16:38,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:16:38,708 INFO L87 Difference]: Start difference. First operand 53 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:38,724 INFO L93 Difference]: Finished difference Result 68 states and 170 transitions. [2021-07-09 18:16:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-09 18:16:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:38,726 INFO L225 Difference]: With dead ends: 68 [2021-07-09 18:16:38,726 INFO L226 Difference]: Without dead ends: 49 [2021-07-09 18:16:38,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-07-09 18:16:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-09 18:16:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-07-09 18:16:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 126 transitions. [2021-07-09 18:16:38,730 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 126 transitions. Word has length 13 [2021-07-09 18:16:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:38,730 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 126 transitions. [2021-07-09 18:16:38,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 126 transitions. [2021-07-09 18:16:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 18:16:38,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:38,731 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:38,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:38,951 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:38,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:38,951 INFO L82 PathProgramCache]: Analyzing trace with hash -242961336, now seen corresponding path program 1 times [2021-07-09 18:16:38,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:38,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481279286] [2021-07-09 18:16:38,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:38,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:38,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:38,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481279286] [2021-07-09 18:16:38,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481279286] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:38,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:38,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 18:16:38,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897458817] [2021-07-09 18:16:38,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:16:38,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:38,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:16:38,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:38,984 INFO L87 Difference]: Start difference. First operand 49 states and 126 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:38,993 INFO L93 Difference]: Finished difference Result 29 states and 63 transitions. [2021-07-09 18:16:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 18:16:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:38,995 INFO L225 Difference]: With dead ends: 29 [2021-07-09 18:16:38,995 INFO L226 Difference]: Without dead ends: 28 [2021-07-09 18:16:38,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-07-09 18:16:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-07-09 18:16:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 62 transitions. [2021-07-09 18:16:38,998 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 62 transitions. Word has length 14 [2021-07-09 18:16:38,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:38,998 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 62 transitions. [2021-07-09 18:16:38,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:38,998 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 62 transitions. [2021-07-09 18:16:38,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 18:16:38,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:38,999 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:38,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:16:38,999 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:38,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:38,999 INFO L82 PathProgramCache]: Analyzing trace with hash -757524308, now seen corresponding path program 1 times [2021-07-09 18:16:38,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:38,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454445830] [2021-07-09 18:16:38,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:39,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:39,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454445830] [2021-07-09 18:16:39,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454445830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:39,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682369114] [2021-07-09 18:16:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:39,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 18:16:39,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:39,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:39,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682369114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:39,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:39,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-09 18:16:39,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053024261] [2021-07-09 18:16:39,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 18:16:39,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:39,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 18:16:39,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-07-09 18:16:39,188 INFO L87 Difference]: Start difference. First operand 28 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:39,215 INFO L93 Difference]: Finished difference Result 47 states and 113 transitions. [2021-07-09 18:16:39,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 18:16:39,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 18:16:39,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:39,216 INFO L225 Difference]: With dead ends: 47 [2021-07-09 18:16:39,216 INFO L226 Difference]: Without dead ends: 43 [2021-07-09 18:16:39,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-07-09 18:16:39,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-07-09 18:16:39,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-07-09 18:16:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 103 transitions. [2021-07-09 18:16:39,221 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 103 transitions. Word has length 14 [2021-07-09 18:16:39,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:39,222 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 103 transitions. [2021-07-09 18:16:39,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 103 transitions. [2021-07-09 18:16:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:16:39,222 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:39,222 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:39,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:39,441 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:39,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1436036254, now seen corresponding path program 1 times [2021-07-09 18:16:39,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:39,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016718139] [2021-07-09 18:16:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:39,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:39,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016718139] [2021-07-09 18:16:39,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016718139] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:39,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:39,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:16:39,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725747641] [2021-07-09 18:16:39,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 18:16:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 18:16:39,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:16:39,491 INFO L87 Difference]: Start difference. First operand 42 states and 103 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) [2021-07-09 18:16:39,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:39,500 INFO L93 Difference]: Finished difference Result 60 states and 135 transitions. [2021-07-09 18:16:39,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 18:16:39,500 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 [2021-07-09 18:16:39,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:39,501 INFO L225 Difference]: With dead ends: 60 [2021-07-09 18:16:39,501 INFO L226 Difference]: Without dead ends: 58 [2021-07-09 18:16:39,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 18:16:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-07-09 18:16:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-07-09 18:16:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-07-09 18:16:39,506 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2021-07-09 18:16:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:39,506 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-07-09 18:16:39,506 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) [2021-07-09 18:16:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-07-09 18:16:39,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:16:39,507 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:39,507 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:39,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-09 18:16:39,507 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:39,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:39,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2049584416, now seen corresponding path program 2 times [2021-07-09 18:16:39,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:39,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098084425] [2021-07-09 18:16:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:39,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:39,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098084425] [2021-07-09 18:16:39,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098084425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:39,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858379617] [2021-07-09 18:16:39,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:39,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:39,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:16:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:39,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858379617] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:39,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:39,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-09 18:16:39,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489570672] [2021-07-09 18:16:39,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:16:39,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:16:39,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:39,749 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:39,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:39,808 INFO L93 Difference]: Finished difference Result 77 states and 188 transitions. [2021-07-09 18:16:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:16:39,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-07-09 18:16:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:39,810 INFO L225 Difference]: With dead ends: 77 [2021-07-09 18:16:39,811 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 18:16:39,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:16:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 18:16:39,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-07-09 18:16:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:39,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2021-07-09 18:16:39,826 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 15 [2021-07-09 18:16:39,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:39,827 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2021-07-09 18:16:39,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2021-07-09 18:16:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-09 18:16:39,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:39,829 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:40,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:40,030 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:40,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:40,031 INFO L82 PathProgramCache]: Analyzing trace with hash 833536548, now seen corresponding path program 3 times [2021-07-09 18:16:40,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:40,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478633266] [2021-07-09 18:16:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:40,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:40,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:40,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478633266] [2021-07-09 18:16:40,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478633266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:40,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878079087] [2021-07-09 18:16:40,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:40,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-09 18:16:40,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:40,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:16:40,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:40,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878079087] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:40,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:40,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-09 18:16:40,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638581589] [2021-07-09 18:16:40,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:16:40,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:40,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:16:40,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:40,281 INFO L87 Difference]: Start difference. First operand 51 states and 129 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2021-07-09 18:16:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:40,352 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2021-07-09 18:16:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:16:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 15 [2021-07-09 18:16:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:40,353 INFO L225 Difference]: With dead ends: 80 [2021-07-09 18:16:40,353 INFO L226 Difference]: Without dead ends: 71 [2021-07-09 18:16:40,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:16:40,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-07-09 18:16:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-07-09 18:16:40,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.6964285714285716) internal successors, (151), 56 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 151 transitions. [2021-07-09 18:16:40,356 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 151 transitions. Word has length 15 [2021-07-09 18:16:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:40,356 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 151 transitions. [2021-07-09 18:16:40,356 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2021-07-09 18:16:40,356 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 151 transitions. [2021-07-09 18:16:40,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:40,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:40,357 INFO L508 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:40,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:40,573 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:40,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:40,575 INFO L82 PathProgramCache]: Analyzing trace with hash 36878570, now seen corresponding path program 2 times [2021-07-09 18:16:40,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:40,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307182233] [2021-07-09 18:16:40,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:40,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:40,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307182233] [2021-07-09 18:16:40,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307182233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:40,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727044597] [2021-07-09 18:16:40,682 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 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 [2021-07-09 18:16:40,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:40,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:16:40,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:40,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727044597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:40,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:40,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-07-09 18:16:40,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150670954] [2021-07-09 18:16:40,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:16:40,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:40,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:16:40,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:16:40,944 INFO L87 Difference]: Start difference. First operand 57 states and 151 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:41,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:41,101 INFO L93 Difference]: Finished difference Result 118 states and 329 transitions. [2021-07-09 18:16:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:16:41,102 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 18:16:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:41,103 INFO L225 Difference]: With dead ends: 118 [2021-07-09 18:16:41,103 INFO L226 Difference]: Without dead ends: 114 [2021-07-09 18:16:41,103 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:16:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-09 18:16:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2021-07-09 18:16:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 3.0675675675675675) internal successors, (227), 74 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 227 transitions. [2021-07-09 18:16:41,106 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 227 transitions. Word has length 16 [2021-07-09 18:16:41,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:41,107 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 227 transitions. [2021-07-09 18:16:41,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 227 transitions. [2021-07-09 18:16:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:41,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:41,111 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:41,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:41,312 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash 846225196, now seen corresponding path program 4 times [2021-07-09 18:16:41,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:41,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872392840] [2021-07-09 18:16:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:41,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:41,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872392840] [2021-07-09 18:16:41,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872392840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:41,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820912134] [2021-07-09 18:16:41,373 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 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 [2021-07-09 18:16:41,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:41,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:41,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:16:41,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:41,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820912134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:41,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:41,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 18:16:41,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823015122] [2021-07-09 18:16:41,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:16:41,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:16:41,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:16:41,477 INFO L87 Difference]: Start difference. First operand 75 states and 227 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) [2021-07-09 18:16:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:41,513 INFO L93 Difference]: Finished difference Result 80 states and 225 transitions. [2021-07-09 18:16:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:16:41,514 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 16 [2021-07-09 18:16:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:41,514 INFO L225 Difference]: With dead ends: 80 [2021-07-09 18:16:41,514 INFO L226 Difference]: Without dead ends: 77 [2021-07-09 18:16:41,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:16:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-07-09 18:16:41,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2021-07-09 18:16:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.943661971830986) internal successors, (209), 71 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:41,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 209 transitions. [2021-07-09 18:16:41,524 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 209 transitions. Word has length 16 [2021-07-09 18:16:41,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:41,525 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 209 transitions. [2021-07-09 18:16:41,525 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) [2021-07-09 18:16:41,525 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 209 transitions. [2021-07-09 18:16:41,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:16:41,529 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:41,529 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:41,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:16:41,740 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:41,740 INFO L82 PathProgramCache]: Analyzing trace with hash 292721696, now seen corresponding path program 3 times [2021-07-09 18:16:41,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:41,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963354659] [2021-07-09 18:16:41,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:41,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:41,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963354659] [2021-07-09 18:16:41,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963354659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:41,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117500314] [2021-07-09 18:16:41,792 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 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 [2021-07-09 18:16:41,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:16:41,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:41,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:16:41,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:42,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117500314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:42,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:42,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-09 18:16:42,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226263031] [2021-07-09 18:16:42,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 18:16:42,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:42,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 18:16:42,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-07-09 18:16:42,004 INFO L87 Difference]: Start difference. First operand 72 states and 209 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:42,134 INFO L93 Difference]: Finished difference Result 130 states and 354 transitions. [2021-07-09 18:16:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:16:42,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:16:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:42,135 INFO L225 Difference]: With dead ends: 130 [2021-07-09 18:16:42,136 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 18:16:42,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:16:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 18:16:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2021-07-09 18:16:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 3.075) internal successors, (246), 80 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 246 transitions. [2021-07-09 18:16:42,141 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 246 transitions. Word has length 17 [2021-07-09 18:16:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:42,142 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 246 transitions. [2021-07-09 18:16:42,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 246 transitions. [2021-07-09 18:16:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:16:42,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:42,142 INFO L508 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:42,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:16:42,357 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:42,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1102068322, now seen corresponding path program 4 times [2021-07-09 18:16:42,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:42,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769889402] [2021-07-09 18:16:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:42,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:42,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769889402] [2021-07-09 18:16:42,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769889402] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215618014] [2021-07-09 18:16:42,417 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 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 [2021-07-09 18:16:42,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:42,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:42,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:16:42,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:42,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215618014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:42,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:42,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-09 18:16:42,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650063582] [2021-07-09 18:16:42,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:16:42,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:16:42,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:16:42,568 INFO L87 Difference]: Start difference. First operand 81 states and 246 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:42,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:42,701 INFO L93 Difference]: Finished difference Result 94 states and 267 transitions. [2021-07-09 18:16:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:16:42,701 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:16:42,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:42,702 INFO L225 Difference]: With dead ends: 94 [2021-07-09 18:16:42,702 INFO L226 Difference]: Without dead ends: 93 [2021-07-09 18:16:42,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:16:42,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-07-09 18:16:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-07-09 18:16:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 3.049382716049383) internal successors, (247), 81 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 247 transitions. [2021-07-09 18:16:42,705 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 247 transitions. Word has length 17 [2021-07-09 18:16:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:42,705 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 247 transitions. [2021-07-09 18:16:42,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 247 transitions. [2021-07-09 18:16:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 18:16:42,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:42,706 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:42,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:42,917 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:42,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:42,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1878688318, now seen corresponding path program 5 times [2021-07-09 18:16:42,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:42,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133283009] [2021-07-09 18:16:42,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:42,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:42,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133283009] [2021-07-09 18:16:42,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133283009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:42,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868701465] [2021-07-09 18:16:42,963 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 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 [2021-07-09 18:16:43,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:16:43,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:43,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:16:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:43,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868701465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:43,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:43,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 18:16:43,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662956024] [2021-07-09 18:16:43,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:16:43,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:43,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:16:43,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:16:43,090 INFO L87 Difference]: Start difference. First operand 82 states and 247 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:43,110 INFO L93 Difference]: Finished difference Result 110 states and 254 transitions. [2021-07-09 18:16:43,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:16:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 18:16:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:43,111 INFO L225 Difference]: With dead ends: 110 [2021-07-09 18:16:43,111 INFO L226 Difference]: Without dead ends: 98 [2021-07-09 18:16:43,111 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:16:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-09 18:16:43,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2021-07-09 18:16:43,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 68 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:43,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 179 transitions. [2021-07-09 18:16:43,113 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 179 transitions. Word has length 17 [2021-07-09 18:16:43,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:43,114 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 179 transitions. [2021-07-09 18:16:43,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:43,114 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 179 transitions. [2021-07-09 18:16:43,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:16:43,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:43,115 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:43,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:43,325 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash -366075990, now seen corresponding path program 5 times [2021-07-09 18:16:43,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:43,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491548801] [2021-07-09 18:16:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:43,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491548801] [2021-07-09 18:16:43,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491548801] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:43,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471655463] [2021-07-09 18:16:43,372 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 [2021-07-09 18:16:43,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:16:43,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:43,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:16:43,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:43,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471655463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:43,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:43,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-09 18:16:43,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223812596] [2021-07-09 18:16:43,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:16:43,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:43,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:16:43,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:16:43,575 INFO L87 Difference]: Start difference. First operand 69 states and 179 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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) [2021-07-09 18:16:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:43,691 INFO L93 Difference]: Finished difference Result 190 states and 501 transitions. [2021-07-09 18:16:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:16:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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 18 [2021-07-09 18:16:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:43,693 INFO L225 Difference]: With dead ends: 190 [2021-07-09 18:16:43,693 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 18:16:43,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:16:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 18:16:43,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 106. [2021-07-09 18:16:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 3.1333333333333333) internal successors, (329), 105 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 329 transitions. [2021-07-09 18:16:43,697 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 329 transitions. Word has length 18 [2021-07-09 18:16:43,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:43,697 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 329 transitions. [2021-07-09 18:16:43,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 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) [2021-07-09 18:16:43,697 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 329 transitions. [2021-07-09 18:16:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:16:43,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:43,698 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:43,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:16:43,912 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:43,913 INFO L82 PathProgramCache]: Analyzing trace with hash 443270636, now seen corresponding path program 6 times [2021-07-09 18:16:43,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:43,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882657658] [2021-07-09 18:16:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:44,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:44,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882657658] [2021-07-09 18:16:44,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882657658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:44,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044075500] [2021-07-09 18:16:44,021 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 [2021-07-09 18:16:44,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:16:44,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:44,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 18:16:44,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:44,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044075500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:44,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:44,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-09 18:16:44,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197218340] [2021-07-09 18:16:44,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:16:44,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:44,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:16:44,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:16:44,200 INFO L87 Difference]: Start difference. First operand 106 states and 329 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-07-09 18:16:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:44,269 INFO L93 Difference]: Finished difference Result 120 states and 354 transitions. [2021-07-09 18:16:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 18:16:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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 18 [2021-07-09 18:16:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:44,270 INFO L225 Difference]: With dead ends: 120 [2021-07-09 18:16:44,270 INFO L226 Difference]: Without dead ends: 113 [2021-07-09 18:16:44,271 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:16:44,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-09 18:16:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-07-09 18:16:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 3.074074074074074) internal successors, (332), 108 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 332 transitions. [2021-07-09 18:16:44,274 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 332 transitions. Word has length 18 [2021-07-09 18:16:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:44,274 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 332 transitions. [2021-07-09 18:16:44,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 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) [2021-07-09 18:16:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 332 transitions. [2021-07-09 18:16:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:16:44,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:44,274 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:44,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:44,491 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:44,491 INFO L82 PathProgramCache]: Analyzing trace with hash 5973854, now seen corresponding path program 7 times [2021-07-09 18:16:44,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:44,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637719653] [2021-07-09 18:16:44,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:44,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:44,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637719653] [2021-07-09 18:16:44,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637719653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:44,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267416443] [2021-07-09 18:16:44,563 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 [2021-07-09 18:16:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:44,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 18:16:44,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:44,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267416443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:44,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:44,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-09 18:16:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310068960] [2021-07-09 18:16:44,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:16:44,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:44,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:16:44,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:16:44,818 INFO L87 Difference]: Start difference. First operand 109 states and 332 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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) [2021-07-09 18:16:44,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:44,912 INFO L93 Difference]: Finished difference Result 60 states and 141 transitions. [2021-07-09 18:16:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:16:44,913 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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 19 [2021-07-09 18:16:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:44,913 INFO L225 Difference]: With dead ends: 60 [2021-07-09 18:16:44,913 INFO L226 Difference]: Without dead ends: 56 [2021-07-09 18:16:44,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:16:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-07-09 18:16:44,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-07-09 18:16:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.4814814814814814) internal successors, (134), 54 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 134 transitions. [2021-07-09 18:16:44,915 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 134 transitions. Word has length 19 [2021-07-09 18:16:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:44,915 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 134 transitions. [2021-07-09 18:16:44,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 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) [2021-07-09 18:16:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 134 transitions. [2021-07-09 18:16:44,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-09 18:16:44,915 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:44,915 INFO L508 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:45,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:16:45,132 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash 815320480, now seen corresponding path program 8 times [2021-07-09 18:16:45,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:45,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251513275] [2021-07-09 18:16:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:45,212 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:45,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:45,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251513275] [2021-07-09 18:16:45,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251513275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:45,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667513378] [2021-07-09 18:16:45,212 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 [2021-07-09 18:16:45,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:45,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:45,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:16:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:45,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667513378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:45,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:45,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:16:45,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282467007] [2021-07-09 18:16:45,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:16:45,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:45,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:16:45,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:16:45,507 INFO L87 Difference]: Start difference. First operand 55 states and 134 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:45,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:45,658 INFO L93 Difference]: Finished difference Result 71 states and 176 transitions. [2021-07-09 18:16:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:16:45,658 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-09 18:16:45,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:45,658 INFO L225 Difference]: With dead ends: 71 [2021-07-09 18:16:45,658 INFO L226 Difference]: Without dead ends: 67 [2021-07-09 18:16:45,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:16:45,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-09 18:16:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-07-09 18:16:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.564516129032258) internal successors, (159), 62 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:45,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-07-09 18:16:45,660 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 19 [2021-07-09 18:16:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:45,660 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-07-09 18:16:45,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-07-09 18:16:45,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:16:45,661 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:45,661 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:45,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:45,877 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:45,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:45,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1345382870, now seen corresponding path program 9 times [2021-07-09 18:16:45,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:45,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428693077] [2021-07-09 18:16:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:45,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:45,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428693077] [2021-07-09 18:16:45,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428693077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:45,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701223956] [2021-07-09 18:16:45,940 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 [2021-07-09 18:16:45,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:16:45,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:16:45,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:46,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:16:46,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:46,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:16:46,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:46,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:46,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2021-07-09 18:16:46,169 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:81 [2021-07-09 18:16:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:46,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701223956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:46,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:46,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-09 18:16:46,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480402242] [2021-07-09 18:16:46,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:16:46,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:16:46,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:16:46,259 INFO L87 Difference]: Start difference. First operand 63 states and 159 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:46,511 INFO L93 Difference]: Finished difference Result 392 states and 980 transitions. [2021-07-09 18:16:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:16:46,511 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:16:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:46,513 INFO L225 Difference]: With dead ends: 392 [2021-07-09 18:16:46,513 INFO L226 Difference]: Without dead ends: 370 [2021-07-09 18:16:46,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:16:46,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-07-09 18:16:46,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 137. [2021-07-09 18:16:46,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 3.25) internal successors, (442), 136 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 442 transitions. [2021-07-09 18:16:46,518 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 442 transitions. Word has length 20 [2021-07-09 18:16:46,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:46,518 INFO L482 AbstractCegarLoop]: Abstraction has 137 states and 442 transitions. [2021-07-09 18:16:46,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:46,518 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 442 transitions. [2021-07-09 18:16:46,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:16:46,518 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:46,518 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:46,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-09 18:16:46,719 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:46,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:46,719 INFO L82 PathProgramCache]: Analyzing trace with hash -536036244, now seen corresponding path program 10 times [2021-07-09 18:16:46,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:46,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061906571] [2021-07-09 18:16:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:46,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:46,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061906571] [2021-07-09 18:16:46,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061906571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:46,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176695690] [2021-07-09 18:16:46,821 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 [2021-07-09 18:16:46,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 18:16:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:47,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176695690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:47,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:47,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:16:47,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985941569] [2021-07-09 18:16:47,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:16:47,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:47,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:16:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:16:47,134 INFO L87 Difference]: Start difference. First operand 137 states and 442 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:47,240 INFO L93 Difference]: Finished difference Result 96 states and 272 transitions. [2021-07-09 18:16:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:16:47,240 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:16:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:47,240 INFO L225 Difference]: With dead ends: 96 [2021-07-09 18:16:47,241 INFO L226 Difference]: Without dead ends: 86 [2021-07-09 18:16:47,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:16:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-07-09 18:16:47,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-07-09 18:16:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.9529411764705884) internal successors, (251), 85 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 251 transitions. [2021-07-09 18:16:47,243 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 251 transitions. Word has length 20 [2021-07-09 18:16:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:47,243 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 251 transitions. [2021-07-09 18:16:47,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 251 transitions. [2021-07-09 18:16:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:16:47,243 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:47,243 INFO L508 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:47,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:47,444 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1129551998, now seen corresponding path program 11 times [2021-07-09 18:16:47,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:47,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356468435] [2021-07-09 18:16:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:47,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:47,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356468435] [2021-07-09 18:16:47,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356468435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:47,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115654520] [2021-07-09 18:16:47,572 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 [2021-07-09 18:16:47,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:16:47,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:47,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:16:47,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:48,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115654520] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:48,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:48,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-09 18:16:48,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193505670] [2021-07-09 18:16:48,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:16:48,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:48,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:16:48,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:16:48,007 INFO L87 Difference]: Start difference. First operand 86 states and 251 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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) [2021-07-09 18:16:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:48,063 INFO L93 Difference]: Finished difference Result 93 states and 262 transitions. [2021-07-09 18:16:48,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 18:16:48,063 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 [2021-07-09 18:16:48,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:48,064 INFO L225 Difference]: With dead ends: 93 [2021-07-09 18:16:48,064 INFO L226 Difference]: Without dead ends: 91 [2021-07-09 18:16:48,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:16:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-09 18:16:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2021-07-09 18:16:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.929411764705882) internal successors, (249), 85 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 249 transitions. [2021-07-09 18:16:48,066 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 249 transitions. Word has length 21 [2021-07-09 18:16:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:48,066 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 249 transitions. [2021-07-09 18:16:48,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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) [2021-07-09 18:16:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 249 transitions. [2021-07-09 18:16:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-09 18:16:48,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:48,067 INFO L508 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:48,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 18:16:48,277 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2003542752, now seen corresponding path program 12 times [2021-07-09 18:16:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141336219] [2021-07-09 18:16:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:48,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:48,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141336219] [2021-07-09 18:16:48,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141336219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:48,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567110269] [2021-07-09 18:16:48,369 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 [2021-07-09 18:16:48,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:16:48,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:48,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 18:16:48,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:48,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:16:48,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:48,592 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:48,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:16:48,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:48,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:48,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:16:48,638 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-07-09 18:16:48,833 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-07-09 18:16:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:48,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567110269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:48,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:48,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-09 18:16:48,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892498288] [2021-07-09 18:16:48,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:16:48,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:48,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:16:48,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:16:48,867 INFO L87 Difference]: Start difference. First operand 86 states and 249 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-09 18:16:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:48,947 INFO L93 Difference]: Finished difference Result 106 states and 294 transitions. [2021-07-09 18:16:48,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 18:16:48,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 21 [2021-07-09 18:16:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:48,948 INFO L225 Difference]: With dead ends: 106 [2021-07-09 18:16:48,948 INFO L226 Difference]: Without dead ends: 100 [2021-07-09 18:16:48,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:16:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-07-09 18:16:48,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2021-07-09 18:16:48,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.891304347826087) internal successors, (266), 92 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 266 transitions. [2021-07-09 18:16:48,950 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 266 transitions. Word has length 21 [2021-07-09 18:16:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:48,950 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 266 transitions. [2021-07-09 18:16:48,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2021-07-09 18:16:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 266 transitions. [2021-07-09 18:16:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:16:48,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:48,951 INFO L508 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:49,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-09 18:16:49,151 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2021450516, now seen corresponding path program 13 times [2021-07-09 18:16:49,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:49,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89258144] [2021-07-09 18:16:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:49,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:49,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89258144] [2021-07-09 18:16:49,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89258144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:49,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205955250] [2021-07-09 18:16:49,302 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 [2021-07-09 18:16:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:49,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 18:16:49,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:49,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205955250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:49,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:49,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-09 18:16:49,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964535228] [2021-07-09 18:16:49,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:16:49,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:49,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:16:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:16:49,752 INFO L87 Difference]: Start difference. First operand 93 states and 266 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-07-09 18:16:49,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:49,946 INFO L93 Difference]: Finished difference Result 132 states and 353 transitions. [2021-07-09 18:16:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 18:16:49,947 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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 22 [2021-07-09 18:16:49,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:49,947 INFO L225 Difference]: With dead ends: 132 [2021-07-09 18:16:49,947 INFO L226 Difference]: Without dead ends: 126 [2021-07-09 18:16:49,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 530.8ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:16:49,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-09 18:16:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2021-07-09 18:16:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.92) internal successors, (292), 100 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 292 transitions. [2021-07-09 18:16:49,950 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 292 transitions. Word has length 22 [2021-07-09 18:16:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:49,950 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 292 transitions. [2021-07-09 18:16:49,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 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) [2021-07-09 18:16:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 292 transitions. [2021-07-09 18:16:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:16:49,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:49,951 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:50,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:50,151 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:50,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1399526026, now seen corresponding path program 14 times [2021-07-09 18:16:50,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:50,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483627044] [2021-07-09 18:16:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:50,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:50,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483627044] [2021-07-09 18:16:50,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483627044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:50,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774890551] [2021-07-09 18:16:50,222 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 [2021-07-09 18:16:50,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:50,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 18:16:50,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:50,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:16:50,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:50,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:50,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-07-09 18:16:50,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:50,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:50,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-1 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2021-07-09 18:16:50,493 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:99, output treesize:85 [2021-07-09 18:16:50,856 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2021-07-09 18:16:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:16:50,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774890551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:50,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:50,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-09 18:16:50,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747338886] [2021-07-09 18:16:50,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:16:50,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:50,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:16:50,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:16:50,863 INFO L87 Difference]: Start difference. First operand 101 states and 292 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:51,006 INFO L93 Difference]: Finished difference Result 230 states and 668 transitions. [2021-07-09 18:16:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:16:51,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-07-09 18:16:51,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:51,008 INFO L225 Difference]: With dead ends: 230 [2021-07-09 18:16:51,008 INFO L226 Difference]: Without dead ends: 215 [2021-07-09 18:16:51,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:16:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-07-09 18:16:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 149. [2021-07-09 18:16:51,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.324324324324324) internal successors, (492), 148 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 492 transitions. [2021-07-09 18:16:51,011 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 492 transitions. Word has length 22 [2021-07-09 18:16:51,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:51,011 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 492 transitions. [2021-07-09 18:16:51,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 492 transitions. [2021-07-09 18:16:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 18:16:51,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:51,012 INFO L508 BasicCegarLoop]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:51,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-09 18:16:51,222 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1718376096, now seen corresponding path program 15 times [2021-07-09 18:16:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:51,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966808110] [2021-07-09 18:16:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:51,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:51,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966808110] [2021-07-09 18:16:51,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966808110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:51,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855279213] [2021-07-09 18:16:51,387 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 [2021-07-09 18:16:51,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:16:51,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:51,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 18:16:51,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:51,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855279213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:51,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:51,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:16:51,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531941837] [2021-07-09 18:16:51,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:16:51,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:51,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:16:51,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:16:51,886 INFO L87 Difference]: Start difference. First operand 149 states and 492 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:52,165 INFO L93 Difference]: Finished difference Result 197 states and 539 transitions. [2021-07-09 18:16:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:16:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 18:16:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:52,166 INFO L225 Difference]: With dead ends: 197 [2021-07-09 18:16:52,166 INFO L226 Difference]: Without dead ends: 174 [2021-07-09 18:16:52,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:16:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-09 18:16:52,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 119. [2021-07-09 18:16:52,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 3.110169491525424) internal successors, (367), 118 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 367 transitions. [2021-07-09 18:16:52,170 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 367 transitions. Word has length 23 [2021-07-09 18:16:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:52,170 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 367 transitions. [2021-07-09 18:16:52,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 367 transitions. [2021-07-09 18:16:52,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:16:52,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:52,170 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:52,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-09 18:16:52,381 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:52,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:52,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1688884076, now seen corresponding path program 16 times [2021-07-09 18:16:52,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:52,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089317783] [2021-07-09 18:16:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:52,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:52,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089317783] [2021-07-09 18:16:52,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089317783] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:52,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930958951] [2021-07-09 18:16:52,541 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:52,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:16:52,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:52,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 18:16:52,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:53,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930958951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:53,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:53,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-07-09 18:16:53,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685978339] [2021-07-09 18:16:53,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:16:53,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:53,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:16:53,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:16:53,164 INFO L87 Difference]: Start difference. First operand 119 states and 367 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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) [2021-07-09 18:16:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:53,652 INFO L93 Difference]: Finished difference Result 327 states and 811 transitions. [2021-07-09 18:16:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:16:53,652 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:16:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:53,653 INFO L225 Difference]: With dead ends: 327 [2021-07-09 18:16:53,654 INFO L226 Difference]: Without dead ends: 311 [2021-07-09 18:16:53,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 785.1ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:16:53,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-07-09 18:16:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 141. [2021-07-09 18:16:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 3.1285714285714286) internal successors, (438), 140 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 438 transitions. [2021-07-09 18:16:53,660 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 438 transitions. Word has length 24 [2021-07-09 18:16:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:53,660 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 438 transitions. [2021-07-09 18:16:53,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 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) [2021-07-09 18:16:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 438 transitions. [2021-07-09 18:16:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-07-09 18:16:53,660 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:53,660 INFO L508 BasicCegarLoop]: trace histogram [7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:53,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:53,877 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:53,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:53,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1454689826, now seen corresponding path program 17 times [2021-07-09 18:16:53,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:53,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477237523] [2021-07-09 18:16:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:54,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:54,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477237523] [2021-07-09 18:16:54,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477237523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:54,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087085151] [2021-07-09 18:16:54,084 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 [2021-07-09 18:16:54,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:16:54,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:54,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 18:16:54,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:54,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087085151] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:54,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:54,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-07-09 18:16:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963190485] [2021-07-09 18:16:54,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:16:54,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:16:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:16:54,636 INFO L87 Difference]: Start difference. First operand 141 states and 438 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 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) [2021-07-09 18:16:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:54,935 INFO L93 Difference]: Finished difference Result 137 states and 247 transitions. [2021-07-09 18:16:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 18:16:54,936 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 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 [2021-07-09 18:16:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:54,936 INFO L225 Difference]: With dead ends: 137 [2021-07-09 18:16:54,936 INFO L226 Difference]: Without dead ends: 0 [2021-07-09 18:16:54,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 767.6ms TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 18:16:54,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-09 18:16:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-09 18:16:54,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:54,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-09 18:16:54,936 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-07-09 18:16:54,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:54,937 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-09 18:16:54,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 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) [2021-07-09 18:16:54,937 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-09 18:16:54,937 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-09 18:16:55,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-09 18:16:55,139 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-09 18:16:55,140 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.07 06:16:55 BasicIcfg [2021-07-09 18:16:55,140 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-09 18:16:55,141 INFO L168 Benchmark]: Toolchain (without parser) took 17874.26 ms. Allocated memory was 195.0 MB in the beginning and 360.7 MB in the end (delta: 165.7 MB). Free memory was 175.6 MB in the beginning and 136.5 MB in the end (delta: 39.1 MB). Peak memory consumption was 205.3 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:55,141 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-09 18:16:55,141 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.91 ms. Allocated memory is still 195.0 MB. Free memory was 175.4 MB in the beginning and 174.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:55,141 INFO L168 Benchmark]: Boogie Preprocessor took 12.87 ms. Allocated memory is still 195.0 MB. Free memory was 174.0 MB in the beginning and 172.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:55,141 INFO L168 Benchmark]: RCFGBuilder took 419.29 ms. Allocated memory is still 195.0 MB. Free memory was 172.9 MB in the beginning and 144.2 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:55,141 INFO L168 Benchmark]: TraceAbstraction took 17417.38 ms. Allocated memory was 195.0 MB in the beginning and 360.7 MB in the end (delta: 165.7 MB). Free memory was 143.8 MB in the beginning and 136.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 173.8 MB. Max. memory is 8.0 GB. [2021-07-09 18:16:55,141 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 195.0 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.91 ms. Allocated memory is still 195.0 MB. Free memory was 175.4 MB in the beginning and 174.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 12.87 ms. Allocated memory is still 195.0 MB. Free memory was 174.0 MB in the beginning and 172.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 419.29 ms. Allocated memory is still 195.0 MB. Free memory was 172.9 MB in the beginning and 144.2 MB in the end (delta: 28.7 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 17417.38 ms. Allocated memory was 195.0 MB in the beginning and 360.7 MB in the end (delta: 165.7 MB). Free memory was 143.8 MB in the beginning and 136.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 173.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 125]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 27 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17306.7ms, OverallIterations: 27, TraceHistogramMax: 7, EmptinessCheckTime: 20.8ms, AutomataDifference: 3122.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 602 SDtfs, 1120 SDslu, 4572 SDs, 0 SdLazy, 2230 SolverSat, 202 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1160.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 650 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 6500.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=24, InterpolantAutomatonStates: 247, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 116.6ms AutomataMinimizationTime, 27 MinimizatonAttempts, 829 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 140.4ms SsaConstructionTime, 475.9ms SatisfiabilityAnalysisTime, 7707.7ms InterpolantComputationTime, 904 NumberOfCodeBlocks, 904 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 854 ConstructedInterpolants, 23 QuantifiedInterpolants, 9864 SizeOfPredicates, 191 NumberOfNonLiveVariables, 1161 ConjunctsInSsa, 294 ConjunctsInUnsatCore, 50 InterpolantComputations, 4 PerfectInterpolantSequences, 169/656 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...