/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 15:12:41,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 15:12:41,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 15:12:41,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 15:12:41,663 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 15:12:41,664 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 15:12:41,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 15:12:41,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 15:12:41,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 15:12:41,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 15:12:41,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 15:12:41,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 15:12:41,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 15:12:41,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 15:12:41,674 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 15:12:41,675 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 15:12:41,676 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 15:12:41,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 15:12:41,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 15:12:41,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 15:12:41,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 15:12:41,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 15:12:41,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 15:12:41,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 15:12:41,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-27 15:12:41,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 15:12:41,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 15:12:41,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 15:12:41,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 15:12:41,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 15:12:41,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 15:12:41,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 15:12:41,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 15:12:41,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 15:12:41,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 15:12:41,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 15:12:41,700 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-SemanticLbe-MCR.epf [2019-12-27 15:12:41,722 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 15:12:41,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 15:12:41,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 15:12:41,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 15:12:41,725 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 15:12:41,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 15:12:41,726 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 15:12:41,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 15:12:41,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 15:12:41,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 15:12:41,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 15:12:41,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 15:12:41,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 15:12:41,728 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 15:12:41,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 15:12:41,729 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 15:12:41,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 15:12:41,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 15:12:41,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 15:12:41,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 15:12:41,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 15:12:41,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 15:12:41,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 15:12:41,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 15:12:41,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 15:12:41,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 15:12:41,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 15:12:41,731 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 15:12:41,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 15:12:41,732 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 15:12:41,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 15:12:42,044 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 15:12:42,062 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 15:12:42,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 15:12:42,066 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 15:12:42,067 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 15:12:42,067 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-27 15:12:42,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c04b6ed/7af9bb9691bb458b8363f80263251ab1/FLAG1e7c8e6cb [2019-12-27 15:12:42,640 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 15:12:42,641 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-27 15:12:42,661 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c04b6ed/7af9bb9691bb458b8363f80263251ab1/FLAG1e7c8e6cb [2019-12-27 15:12:42,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45c04b6ed/7af9bb9691bb458b8363f80263251ab1 [2019-12-27 15:12:42,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 15:12:42,970 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 15:12:42,971 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 15:12:42,971 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 15:12:42,975 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 15:12:42,976 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:12:42" (1/1) ... [2019-12-27 15:12:42,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@398e727f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:42, skipping insertion in model container [2019-12-27 15:12:42,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 03:12:42" (1/1) ... [2019-12-27 15:12:42,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 15:12:43,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 15:12:43,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:12:43,490 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 15:12:43,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 15:12:43,632 INFO L208 MainTranslator]: Completed translation [2019-12-27 15:12:43,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43 WrapperNode [2019-12-27 15:12:43,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 15:12:43,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 15:12:43,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 15:12:43,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 15:12:43,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,688 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 15:12:43,689 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 15:12:43,689 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 15:12:43,689 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 15:12:43,698 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (1/1) ... [2019-12-27 15:12:43,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 15:12:43,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 15:12:43,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 15:12:43,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 15:12:43,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (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 [2019-12-27 15:12:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 15:12:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 15:12:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 15:12:43,780 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 15:12:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 15:12:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 15:12:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 15:12:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 15:12:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 15:12:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 15:12:43,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 15:12:43,783 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-27 15:12:44,147 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 15:12:44,147 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 15:12:44,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:12:44 BoogieIcfgContainer [2019-12-27 15:12:44,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 15:12:44,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 15:12:44,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 15:12:44,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 15:12:44,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 03:12:42" (1/3) ... [2019-12-27 15:12:44,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b885c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:12:44, skipping insertion in model container [2019-12-27 15:12:44,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 03:12:43" (2/3) ... [2019-12-27 15:12:44,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b885c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 03:12:44, skipping insertion in model container [2019-12-27 15:12:44,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 03:12:44" (3/3) ... [2019-12-27 15:12:44,157 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2019-12-27 15:12:44,167 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 15:12:44,168 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 15:12:44,174 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 15:12:44,175 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 15:12:44,201 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,201 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,201 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,202 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,202 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,202 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,203 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,203 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,203 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,203 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,203 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,204 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,204 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,204 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,204 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,205 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,205 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,205 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,205 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,206 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,206 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,206 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,207 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,207 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,207 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,208 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,208 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,208 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,212 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,212 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,213 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,213 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,213 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,213 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,222 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,222 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,223 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,223 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,223 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,223 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 15:12:44,239 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 15:12:44,259 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 15:12:44,260 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 15:12:44,260 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 15:12:44,260 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 15:12:44,260 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 15:12:44,260 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 15:12:44,260 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 15:12:44,261 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 15:12:44,273 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-27 15:12:44,275 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 15:12:44,317 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 15:12:44,317 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:12:44,324 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-27 15:12:44,327 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 15:12:44,346 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 15:12:44,346 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 15:12:44,348 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs. 0/43 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-12-27 15:12:44,350 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-27 15:12:44,351 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-12-27 15:12:45,469 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-27 15:12:45,609 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-27 15:12:45,610 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-27 15:12:45,614 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 15:12:45,622 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 15:12:45,624 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 15:12:45,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 15:12:45,629 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:45,630 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 15:12:45,631 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-27 15:12:45,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:45,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985532537] [2019-12-27 15:12:45,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:45,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:45,945 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985532537] [2019-12-27 15:12:45,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:12:45,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 15:12:45,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1270475874] [2019-12-27 15:12:45,951 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:45,956 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:45,966 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 15:12:45,966 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:45,969 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 15:12:45,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 15:12:45,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 15:12:45,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:12:45,984 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 15:12:46,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:46,019 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-27 15:12:46,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:12:46,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 15:12:46,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:46,062 INFO L225 Difference]: With dead ends: 48 [2019-12-27 15:12:46,063 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 15:12:46,066 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 15:12:46,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 15:12:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 15:12:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 15:12:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-27 15:12:46,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-27 15:12:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:46,119 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-27 15:12:46,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 15:12:46,127 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-27 15:12:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 15:12:46,127 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:46,127 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:46,129 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:46,129 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-27 15:12:46,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:46,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607773337] [2019-12-27 15:12:46,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:46,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607773337] [2019-12-27 15:12:46,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:12:46,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 15:12:46,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [158857090] [2019-12-27 15:12:46,240 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:46,242 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:46,246 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 15:12:46,246 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:46,254 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:46,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 15:12:46,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 15:12:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:12:46,258 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-27 15:12:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:46,281 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 15:12:46,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 15:12:46,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 15:12:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:46,285 INFO L225 Difference]: With dead ends: 34 [2019-12-27 15:12:46,285 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 15:12:46,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 15:12:46,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 15:12:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 15:12:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 15:12:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 15:12:46,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-27 15:12:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:46,293 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 15:12:46,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 15:12:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 15:12:46,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:12:46,294 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:46,294 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:46,294 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-27 15:12:46,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:46,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546082721] [2019-12-27 15:12:46,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:46,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:46,388 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546082721] [2019-12-27 15:12:46,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:12:46,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:12:46,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [418042597] [2019-12-27 15:12:46,389 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:46,390 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:46,394 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 15:12:46,394 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:46,396 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:46,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:12:46,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:46,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:12:46,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:12:46,397 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-27 15:12:46,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:46,435 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 15:12:46,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 15:12:46,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:12:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:46,437 INFO L225 Difference]: With dead ends: 34 [2019-12-27 15:12:46,437 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 15:12:46,438 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-27 15:12:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 15:12:46,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-27 15:12:46,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 15:12:46,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 15:12:46,442 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-27 15:12:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:46,443 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 15:12:46,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:12:46,443 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 15:12:46,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 15:12:46,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:46,444 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:46,444 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:46,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:46,444 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-27 15:12:46,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:46,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297581035] [2019-12-27 15:12:46,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:46,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:46,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297581035] [2019-12-27 15:12:46,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 15:12:46,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 15:12:46,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [661854217] [2019-12-27 15:12:46,498 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:46,499 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:46,501 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 15:12:46,501 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:46,503 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:46,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 15:12:46,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:46,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 15:12:46,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 15:12:46,505 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-27 15:12:46,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:46,538 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 15:12:46,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:12:46,539 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 15:12:46,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:46,539 INFO L225 Difference]: With dead ends: 32 [2019-12-27 15:12:46,539 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 15:12:46,540 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-12-27 15:12:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 15:12:46,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 15:12:46,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 15:12:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 15:12:46,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-27 15:12:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:46,545 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 15:12:46,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 15:12:46,545 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 15:12:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:12:46,546 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:46,546 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:46,546 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:46,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-27 15:12:46,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:46,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806260328] [2019-12-27 15:12:46,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:46,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806260328] [2019-12-27 15:12:46,605 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450362870] [2019-12-27 15:12:46,605 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-27 15:12:46,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 15:12:46,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:46,662 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:12:46,667 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:46,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:46,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 15:12:46,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [354990846] [2019-12-27 15:12:46,693 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:46,694 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:46,696 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 15:12:46,696 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:46,698 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:46,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:12:46,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:12:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 15:12:46,699 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 6 states. [2019-12-27 15:12:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:46,764 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 15:12:46,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 15:12:46,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:12:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:46,766 INFO L225 Difference]: With dead ends: 32 [2019-12-27 15:12:46,766 INFO L226 Difference]: Without dead ends: 29 [2019-12-27 15:12:46,766 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:12:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-27 15:12:46,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-27 15:12:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 15:12:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 15:12:46,771 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-27 15:12:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:46,771 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 15:12:46,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:12:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 15:12:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 15:12:46,772 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:46,772 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:46,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:46,974 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-27 15:12:46,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:46,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767615777] [2019-12-27 15:12:46,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:47,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767615777] [2019-12-27 15:12:47,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667463288] [2019-12-27 15:12:47,041 INFO L92 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 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 [2019-12-27 15:12:47,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:12:47,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:47,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 15:12:47,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:47,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:47,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 15:12:47,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [34374914] [2019-12-27 15:12:47,134 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:47,135 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:47,137 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 15:12:47,138 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:47,142 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:47,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 15:12:47,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:47,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 15:12:47,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 15:12:47,144 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 6 states. [2019-12-27 15:12:47,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:47,212 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-27 15:12:47,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:12:47,213 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 15:12:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:47,213 INFO L225 Difference]: With dead ends: 33 [2019-12-27 15:12:47,214 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 15:12:47,214 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:12:47,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 15:12:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 15:12:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 15:12:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 15:12:47,218 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-27 15:12:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:47,219 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 15:12:47,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 15:12:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 15:12:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:12:47,220 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:47,220 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:47,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:47,421 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:47,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-27 15:12:47,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:47,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293266269] [2019-12-27 15:12:47,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:47,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:47,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293266269] [2019-12-27 15:12:47,495 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136686002] [2019-12-27 15:12:47,495 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:47,557 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:47,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:47,561 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:12:47,563 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:47,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:47,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 15:12:47,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [339063868] [2019-12-27 15:12:47,591 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:47,592 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:47,596 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 15:12:47,596 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:47,598 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:47,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:12:47,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:47,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:12:47,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:12:47,601 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 7 states. [2019-12-27 15:12:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:47,667 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 15:12:47,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 15:12:47,668 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:12:47,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:47,668 INFO L225 Difference]: With dead ends: 34 [2019-12-27 15:12:47,668 INFO L226 Difference]: Without dead ends: 31 [2019-12-27 15:12:47,669 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:12:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-27 15:12:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-27 15:12:47,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-27 15:12:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-27 15:12:47,674 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-27 15:12:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:47,674 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-27 15:12:47,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:12:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-27 15:12:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 15:12:47,677 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:47,677 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:47,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:47,880 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-27 15:12:47,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:47,882 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124936166] [2019-12-27 15:12:47,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:47,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124936166] [2019-12-27 15:12:47,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802806950] [2019-12-27 15:12:47,955 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-27 15:12:48,012 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 15:12:48,013 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:48,013 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 15:12:48,015 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:48,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:48,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 15:12:48,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1913839322] [2019-12-27 15:12:48,047 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:48,048 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:48,050 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 15:12:48,051 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:48,052 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:48,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 15:12:48,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 15:12:48,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 15:12:48,053 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 7 states. [2019-12-27 15:12:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:48,145 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-27 15:12:48,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:12:48,146 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 15:12:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:48,146 INFO L225 Difference]: With dead ends: 35 [2019-12-27 15:12:48,146 INFO L226 Difference]: Without dead ends: 32 [2019-12-27 15:12:48,147 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:12:48,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-27 15:12:48,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-27 15:12:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 15:12:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 15:12:48,154 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-27 15:12:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:48,154 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 15:12:48,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 15:12:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 15:12:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:12:48,155 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:48,155 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:48,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:48,356 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:48,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:48,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-27 15:12:48,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:48,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820874749] [2019-12-27 15:12:48,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:48,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:48,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820874749] [2019-12-27 15:12:48,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112558161] [2019-12-27 15:12:48,420 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-27 15:12:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:48,470 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:12:48,471 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:48,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:48,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 15:12:48,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1262019645] [2019-12-27 15:12:48,486 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:48,487 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:48,490 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 15:12:48,490 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:48,492 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:48,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:12:48,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:48,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:12:48,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:12:48,493 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 8 states. [2019-12-27 15:12:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:48,570 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-27 15:12:48,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 15:12:48,571 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:12:48,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:48,571 INFO L225 Difference]: With dead ends: 36 [2019-12-27 15:12:48,571 INFO L226 Difference]: Without dead ends: 33 [2019-12-27 15:12:48,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:12:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-27 15:12:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-27 15:12:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-27 15:12:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-27 15:12:48,577 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-27 15:12:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:48,577 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-27 15:12:48,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:12:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-27 15:12:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 15:12:48,578 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:48,578 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:48,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:48,781 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:48,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:48,782 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-27 15:12:48,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:48,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559290660] [2019-12-27 15:12:48,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:48,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559290660] [2019-12-27 15:12:48,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636736341] [2019-12-27 15:12:48,862 INFO L92 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 [2019-12-27 15:12:48,909 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:48,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:48,911 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 15:12:48,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:48,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:48,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 15:12:48,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1622807077] [2019-12-27 15:12:48,943 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:48,944 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:48,947 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 15:12:48,947 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:48,948 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:48,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 15:12:48,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:48,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 15:12:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 15:12:48,949 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 8 states. [2019-12-27 15:12:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:49,084 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-27 15:12:49,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:12:49,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 15:12:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:49,085 INFO L225 Difference]: With dead ends: 37 [2019-12-27 15:12:49,085 INFO L226 Difference]: Without dead ends: 34 [2019-12-27 15:12:49,086 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:12:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-27 15:12:49,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-27 15:12:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 15:12:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 15:12:49,095 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-27 15:12:49,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:49,096 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 15:12:49,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 15:12:49,096 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 15:12:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:12:49,097 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:49,098 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:49,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:49,301 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-27 15:12:49,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:49,302 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756132949] [2019-12-27 15:12:49,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:49,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756132949] [2019-12-27 15:12:49,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735470030] [2019-12-27 15:12:49,380 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-27 15:12:49,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 15:12:49,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:49,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:12:49,445 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:49,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:49,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 15:12:49,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2116582986] [2019-12-27 15:12:49,467 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:49,471 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:49,476 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 15:12:49,476 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:49,478 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:49,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:12:49,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:49,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:12:49,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:12:49,479 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 9 states. [2019-12-27 15:12:49,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:49,588 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-27 15:12:49,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 15:12:49,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:12:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:49,590 INFO L225 Difference]: With dead ends: 38 [2019-12-27 15:12:49,591 INFO L226 Difference]: Without dead ends: 35 [2019-12-27 15:12:49,591 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:12:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-27 15:12:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-27 15:12:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-27 15:12:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-27 15:12:49,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-27 15:12:49,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:49,597 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-27 15:12:49,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:12:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-27 15:12:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 15:12:49,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:49,599 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:49,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:49,803 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:49,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-27 15:12:49,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:49,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175730443] [2019-12-27 15:12:49,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:49,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:49,896 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175730443] [2019-12-27 15:12:49,897 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628936180] [2019-12-27 15:12:49,897 INFO L92 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 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 [2019-12-27 15:12:49,942 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:12:49,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:49,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 15:12:49,945 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:49,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:49,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 15:12:49,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150941061] [2019-12-27 15:12:49,983 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:49,984 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:49,986 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 15:12:49,986 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:49,987 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:49,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 15:12:49,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 15:12:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 15:12:49,988 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 9 states. [2019-12-27 15:12:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:50,109 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-27 15:12:50,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:12:50,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 15:12:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:50,110 INFO L225 Difference]: With dead ends: 39 [2019-12-27 15:12:50,111 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 15:12:50,111 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:12:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 15:12:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 15:12:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 15:12:50,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 15:12:50,115 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-27 15:12:50,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:50,115 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 15:12:50,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 15:12:50,115 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 15:12:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:50,116 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:50,116 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:50,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:50,317 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:50,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:50,318 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-27 15:12:50,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:50,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093216507] [2019-12-27 15:12:50,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:50,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093216507] [2019-12-27 15:12:50,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093635517] [2019-12-27 15:12:50,385 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:50,442 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 15:12:50,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:50,443 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:12:50,444 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:50,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:50,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 15:12:50,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [3387236] [2019-12-27 15:12:50,462 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:50,463 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:50,466 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 15:12:50,467 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:50,468 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:50,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:50,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:50,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:50,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:12:50,469 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 10 states. [2019-12-27 15:12:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:50,602 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-27 15:12:50,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 15:12:50,603 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:50,603 INFO L225 Difference]: With dead ends: 40 [2019-12-27 15:12:50,604 INFO L226 Difference]: Without dead ends: 37 [2019-12-27 15:12:50,604 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:12:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-27 15:12:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-27 15:12:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-27 15:12:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-27 15:12:50,607 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-27 15:12:50,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:50,608 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-27 15:12:50,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-27 15:12:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 15:12:50,609 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:50,609 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:50,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:50,812 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-27 15:12:50,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:50,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146246640] [2019-12-27 15:12:50,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:50,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146246640] [2019-12-27 15:12:50,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028920196] [2019-12-27 15:12:50,880 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-27 15:12:50,943 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 15:12:50,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:50,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 15:12:50,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:50,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:50,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 15:12:50,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1103916672] [2019-12-27 15:12:50,983 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:50,985 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:50,987 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 15:12:50,987 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:50,988 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:50,988 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 15:12:50,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 15:12:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 15:12:50,989 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 10 states. [2019-12-27 15:12:51,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:51,133 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-27 15:12:51,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:51,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 15:12:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:51,134 INFO L225 Difference]: With dead ends: 41 [2019-12-27 15:12:51,134 INFO L226 Difference]: Without dead ends: 38 [2019-12-27 15:12:51,135 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:12:51,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-27 15:12:51,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-27 15:12:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 15:12:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 15:12:51,138 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-27 15:12:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:51,138 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 15:12:51,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 15:12:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 15:12:51,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 15:12:51,139 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:51,139 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:51,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:51,347 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:51,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-27 15:12:51,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:51,349 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126120066] [2019-12-27 15:12:51,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:51,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126120066] [2019-12-27 15:12:51,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248422814] [2019-12-27 15:12:51,453 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-27 15:12:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:51,525 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:51,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:51,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:51,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 15:12:51,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1610739623] [2019-12-27 15:12:51,567 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:51,568 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:51,574 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 15:12:51,574 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:51,576 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:51,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 15:12:51,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:51,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 15:12:51,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:12:51,578 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 11 states. [2019-12-27 15:12:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:51,741 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-27 15:12:51,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 15:12:51,742 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-27 15:12:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:51,743 INFO L225 Difference]: With dead ends: 42 [2019-12-27 15:12:51,743 INFO L226 Difference]: Without dead ends: 39 [2019-12-27 15:12:51,743 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:12:51,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-27 15:12:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-27 15:12:51,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-27 15:12:51,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-27 15:12:51,749 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-27 15:12:51,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:51,749 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-27 15:12:51,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 15:12:51,749 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-27 15:12:51,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 15:12:51,750 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:51,750 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:51,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:51,955 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-27 15:12:51,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:51,956 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000944188] [2019-12-27 15:12:51,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:52,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000944188] [2019-12-27 15:12:52,043 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898404819] [2019-12-27 15:12:52,043 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:52,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:52,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:52,114 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 15:12:52,115 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:52,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:52,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 15:12:52,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1155561005] [2019-12-27 15:12:52,140 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:52,141 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:52,144 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 23 transitions. [2019-12-27 15:12:52,144 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:52,145 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:52,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 15:12:52,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:52,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 15:12:52,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 15:12:52,146 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 11 states. [2019-12-27 15:12:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:52,361 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-27 15:12:52,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:12:52,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-27 15:12:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:52,362 INFO L225 Difference]: With dead ends: 43 [2019-12-27 15:12:52,363 INFO L226 Difference]: Without dead ends: 40 [2019-12-27 15:12:52,363 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:12:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-27 15:12:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-27 15:12:52,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 15:12:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-27 15:12:52,367 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-27 15:12:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:52,367 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-27 15:12:52,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 15:12:52,367 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-27 15:12:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 15:12:52,368 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:52,368 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:52,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:52,577 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:52,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-27 15:12:52,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:52,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646394875] [2019-12-27 15:12:52,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:52,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646394875] [2019-12-27 15:12:52,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610691667] [2019-12-27 15:12:52,667 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-27 15:12:52,724 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 15:12:52,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:52,725 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:12:52,727 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:52,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:52,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 15:12:52,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [830977822] [2019-12-27 15:12:52,748 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:52,750 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:52,752 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 15:12:52,753 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:52,754 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:52,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 15:12:52,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 15:12:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:12:52,756 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 12 states. [2019-12-27 15:12:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:52,967 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-27 15:12:52,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 15:12:52,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-27 15:12:52,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:52,969 INFO L225 Difference]: With dead ends: 44 [2019-12-27 15:12:52,969 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 15:12:52,970 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:12:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 15:12:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-27 15:12:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 15:12:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 15:12:52,976 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-27 15:12:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:52,976 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 15:12:52,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 15:12:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 15:12:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 15:12:52,979 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:52,980 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:53,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:53,188 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:53,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-27 15:12:53,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:53,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588344537] [2019-12-27 15:12:53,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:53,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588344537] [2019-12-27 15:12:53,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639060790] [2019-12-27 15:12:53,290 INFO L92 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 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 [2019-12-27 15:12:53,356 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:12:53,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:53,357 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 15:12:53,359 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:53,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:53,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 15:12:53,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [364221641] [2019-12-27 15:12:53,403 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:53,404 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:53,406 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 24 transitions. [2019-12-27 15:12:53,406 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:53,407 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:53,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 15:12:53,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:53,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 15:12:53,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 15:12:53,408 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 12 states. [2019-12-27 15:12:53,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:53,612 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-27 15:12:53,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:12:53,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-27 15:12:53,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:53,619 INFO L225 Difference]: With dead ends: 45 [2019-12-27 15:12:53,619 INFO L226 Difference]: Without dead ends: 42 [2019-12-27 15:12:53,619 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:12:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-27 15:12:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-27 15:12:53,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 15:12:53,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-27 15:12:53,622 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-27 15:12:53,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:53,623 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-27 15:12:53,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 15:12:53,623 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-27 15:12:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 15:12:53,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:53,624 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:53,828 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:53,829 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:53,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:53,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-27 15:12:53,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:53,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611894073] [2019-12-27 15:12:53,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:53,949 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611894073] [2019-12-27 15:12:53,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247919644] [2019-12-27 15:12:53,950 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:54,039 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 15:12:54,040 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:54,041 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 15:12:54,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:54,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:54,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 15:12:54,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1031598935] [2019-12-27 15:12:54,062 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:54,064 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:54,068 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 15:12:54,068 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:54,070 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:54,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 15:12:54,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:54,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 15:12:54,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:12:54,072 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 13 states. [2019-12-27 15:12:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:54,252 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-27 15:12:54,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 15:12:54,258 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-27 15:12:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:54,259 INFO L225 Difference]: With dead ends: 46 [2019-12-27 15:12:54,259 INFO L226 Difference]: Without dead ends: 43 [2019-12-27 15:12:54,259 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:12:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-27 15:12:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-27 15:12:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-27 15:12:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-27 15:12:54,262 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-27 15:12:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:54,262 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-27 15:12:54,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 15:12:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-27 15:12:54,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 15:12:54,263 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:54,263 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:54,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:54,469 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:54,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:54,470 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-27 15:12:54,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:54,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520999079] [2019-12-27 15:12:54,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:54,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:54,623 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520999079] [2019-12-27 15:12:54,624 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167131592] [2019-12-27 15:12:54,624 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-27 15:12:54,684 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 15:12:54,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:54,685 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 15:12:54,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:54,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:54,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 15:12:54,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1671275947] [2019-12-27 15:12:54,714 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:54,716 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:54,718 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 15:12:54,719 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:54,720 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:54,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 15:12:54,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:54,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 15:12:54,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 15:12:54,721 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 13 states. [2019-12-27 15:12:54,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:54,926 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-27 15:12:54,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:12:54,927 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-27 15:12:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:54,927 INFO L225 Difference]: With dead ends: 47 [2019-12-27 15:12:54,928 INFO L226 Difference]: Without dead ends: 44 [2019-12-27 15:12:54,928 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:12:54,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-27 15:12:54,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-27 15:12:54,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-27 15:12:54,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-27 15:12:54,931 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-27 15:12:54,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:54,931 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-27 15:12:54,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 15:12:54,932 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-27 15:12:54,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 15:12:54,932 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:54,932 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:55,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:55,139 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:55,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-27 15:12:55,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:55,140 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658062999] [2019-12-27 15:12:55,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:55,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658062999] [2019-12-27 15:12:55,241 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475771582] [2019-12-27 15:12:55,241 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-27 15:12:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:55,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 15:12:55,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:55,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:55,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 15:12:55,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1639875260] [2019-12-27 15:12:55,326 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:55,328 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:55,332 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 15:12:55,332 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:55,338 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:55,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 15:12:55,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:55,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 15:12:55,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:12:55,340 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 14 states. [2019-12-27 15:12:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:55,565 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-12-27 15:12:55,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 15:12:55,570 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-12-27 15:12:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:55,571 INFO L225 Difference]: With dead ends: 48 [2019-12-27 15:12:55,571 INFO L226 Difference]: Without dead ends: 45 [2019-12-27 15:12:55,571 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:12:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-27 15:12:55,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2019-12-27 15:12:55,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 15:12:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 15:12:55,574 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-12-27 15:12:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:55,574 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 15:12:55,574 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 15:12:55,575 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 15:12:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 15:12:55,575 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:55,575 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:55,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:55,778 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:55,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:55,779 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-27 15:12:55,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:55,780 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569417929] [2019-12-27 15:12:55,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:55,894 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569417929] [2019-12-27 15:12:55,895 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138616399] [2019-12-27 15:12:55,895 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:55,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:12:55,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:55,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 15:12:55,944 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:55,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:55,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 15:12:55,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1470093786] [2019-12-27 15:12:55,970 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:55,974 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:55,977 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 15:12:55,977 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:55,979 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:55,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 15:12:55,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:55,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 15:12:55,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-27 15:12:55,980 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 14 states. [2019-12-27 15:12:56,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:56,180 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-27 15:12:56,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 15:12:56,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-12-27 15:12:56,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:56,186 INFO L225 Difference]: With dead ends: 49 [2019-12-27 15:12:56,186 INFO L226 Difference]: Without dead ends: 46 [2019-12-27 15:12:56,186 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:12:56,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-27 15:12:56,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-27 15:12:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-27 15:12:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-27 15:12:56,189 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 18 [2019-12-27 15:12:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:56,189 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-27 15:12:56,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 15:12:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-27 15:12:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 15:12:56,190 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:56,190 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:56,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:56,399 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:56,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 21 times [2019-12-27 15:12:56,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:56,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061613172] [2019-12-27 15:12:56,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:56,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:56,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061613172] [2019-12-27 15:12:56,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234319981] [2019-12-27 15:12:56,504 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-27 15:12:56,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-27 15:12:56,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:56,573 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 15:12:56,574 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:56,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:56,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:56,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 15:12:56,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1511999332] [2019-12-27 15:12:56,599 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:56,601 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:56,605 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 15:12:56,606 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:56,607 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:56,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 15:12:56,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:56,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 15:12:56,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:12:56,608 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 15 states. [2019-12-27 15:12:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:56,885 INFO L93 Difference]: Finished difference Result 50 states and 102 transitions. [2019-12-27 15:12:56,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 15:12:56,885 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2019-12-27 15:12:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:56,886 INFO L225 Difference]: With dead ends: 50 [2019-12-27 15:12:56,886 INFO L226 Difference]: Without dead ends: 47 [2019-12-27 15:12:56,887 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:12:56,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-27 15:12:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-27 15:12:56,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-27 15:12:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-27 15:12:56,890 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 19 [2019-12-27 15:12:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:56,890 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-27 15:12:56,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 15:12:56,890 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-27 15:12:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 15:12:56,893 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:56,894 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:57,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:57,100 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121454, now seen corresponding path program 22 times [2019-12-27 15:12:57,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:57,101 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33841600] [2019-12-27 15:12:57,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:57,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33841600] [2019-12-27 15:12:57,242 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313440915] [2019-12-27 15:12:57,242 INFO L92 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 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 [2019-12-27 15:12:57,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:12:57,289 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:57,290 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 15:12:57,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:57,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:57,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 15:12:57,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1851282717] [2019-12-27 15:12:57,319 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:57,321 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:57,324 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 15:12:57,324 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:57,325 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:57,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 15:12:57,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 15:12:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 15:12:57,326 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 15 states. [2019-12-27 15:12:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:57,564 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-27 15:12:57,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 15:12:57,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2019-12-27 15:12:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:57,573 INFO L225 Difference]: With dead ends: 51 [2019-12-27 15:12:57,573 INFO L226 Difference]: Without dead ends: 48 [2019-12-27 15:12:57,573 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2019-12-27 15:12:57,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-27 15:12:57,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-12-27 15:12:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-27 15:12:57,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-27 15:12:57,576 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 19 [2019-12-27 15:12:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:57,576 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-27 15:12:57,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 15:12:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-27 15:12:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 15:12:57,577 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:57,577 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:57,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:57,781 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:57,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:57,782 INFO L82 PathProgramCache]: Analyzing trace with hash -65021205, now seen corresponding path program 23 times [2019-12-27 15:12:57,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:57,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391927977] [2019-12-27 15:12:57,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:57,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:57,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391927977] [2019-12-27 15:12:57,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584256324] [2019-12-27 15:12:57,918 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:57,968 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-27 15:12:57,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:57,969 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 15:12:57,970 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:58,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:58,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 15:12:58,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [194663678] [2019-12-27 15:12:58,001 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:58,003 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:58,007 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 32 transitions. [2019-12-27 15:12:58,007 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:58,008 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:58,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 15:12:58,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:58,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 15:12:58,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:12:58,009 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 16 states. [2019-12-27 15:12:58,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:58,285 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-27 15:12:58,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 15:12:58,286 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-12-27 15:12:58,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:58,286 INFO L225 Difference]: With dead ends: 52 [2019-12-27 15:12:58,286 INFO L226 Difference]: Without dead ends: 49 [2019-12-27 15:12:58,287 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2019-12-27 15:12:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-27 15:12:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2019-12-27 15:12:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 15:12:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 15:12:58,290 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 20 [2019-12-27 15:12:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:58,290 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 15:12:58,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 15:12:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 15:12:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 15:12:58,291 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:58,291 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:58,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:58,494 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:58,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 24 times [2019-12-27 15:12:58,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:58,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645388643] [2019-12-27 15:12:58,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:58,625 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:58,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645388643] [2019-12-27 15:12:58,626 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904636682] [2019-12-27 15:12:58,626 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-27 15:12:58,696 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-27 15:12:58,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:12:58,698 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 15:12:58,698 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:58,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:58,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 15:12:58,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1247776257] [2019-12-27 15:12:58,718 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:58,720 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:58,724 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 28 transitions. [2019-12-27 15:12:58,724 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:58,725 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:12:58,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 15:12:58,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:58,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 15:12:58,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-27 15:12:58,726 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 16 states. [2019-12-27 15:12:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:58,993 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-27 15:12:58,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 15:12:58,994 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-12-27 15:12:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:58,995 INFO L225 Difference]: With dead ends: 53 [2019-12-27 15:12:58,995 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 15:12:58,995 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2019-12-27 15:12:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 15:12:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-27 15:12:58,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 15:12:58,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-27 15:12:58,999 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 20 [2019-12-27 15:12:58,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:58,999 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-27 15:12:58,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 15:12:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-27 15:12:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 15:12:59,000 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:59,000 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:59,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:59,202 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:59,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:59,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 25 times [2019-12-27 15:12:59,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:59,204 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783204481] [2019-12-27 15:12:59,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:59,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783204481] [2019-12-27 15:12:59,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867999053] [2019-12-27 15:12:59,322 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-27 15:12:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:12:59,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 15:12:59,373 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:12:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:12:59,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:12:59,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 15:12:59,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1072044247] [2019-12-27 15:12:59,392 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:12:59,394 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:12:59,397 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 33 transitions. [2019-12-27 15:12:59,397 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:12:59,398 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:12:59,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 15:12:59,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:12:59,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 15:12:59,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:12:59,399 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 17 states. [2019-12-27 15:12:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:12:59,727 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-27 15:12:59,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 15:12:59,731 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-27 15:12:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:12:59,732 INFO L225 Difference]: With dead ends: 54 [2019-12-27 15:12:59,732 INFO L226 Difference]: Without dead ends: 51 [2019-12-27 15:12:59,732 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2019-12-27 15:12:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-27 15:12:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-12-27 15:12:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-27 15:12:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2019-12-27 15:12:59,735 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 21 [2019-12-27 15:12:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:12:59,735 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2019-12-27 15:12:59,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 15:12:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2019-12-27 15:12:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 15:12:59,737 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:12:59,737 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:12:59,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:12:59,941 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:12:59,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:12:59,942 INFO L82 PathProgramCache]: Analyzing trace with hash -177481222, now seen corresponding path program 26 times [2019-12-27 15:12:59,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:12:59,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448395695] [2019-12-27 15:12:59,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:12:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:00,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448395695] [2019-12-27 15:13:00,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85792965] [2019-12-27 15:13:00,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:00,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:13:00,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:00,156 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 15:13:00,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:00,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:00,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:00,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 15:13:00,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [470192210] [2019-12-27 15:13:00,186 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:00,214 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:00,218 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 29 transitions. [2019-12-27 15:13:00,218 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:00,219 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:00,219 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 15:13:00,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 15:13:00,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 15:13:00,220 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand 17 states. [2019-12-27 15:13:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:00,501 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-27 15:13:00,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 15:13:00,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-27 15:13:00,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:00,503 INFO L225 Difference]: With dead ends: 55 [2019-12-27 15:13:00,503 INFO L226 Difference]: Without dead ends: 52 [2019-12-27 15:13:00,504 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=665, Unknown=0, NotChecked=0, Total=992 [2019-12-27 15:13:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-27 15:13:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-27 15:13:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 15:13:00,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 15:13:00,507 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 21 [2019-12-27 15:13:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:00,507 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 15:13:00,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 15:13:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 15:13:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 15:13:00,508 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:00,508 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:00,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:00,712 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:00,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1939140947, now seen corresponding path program 27 times [2019-12-27 15:13:00,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:00,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967630123] [2019-12-27 15:13:00,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:00,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967630123] [2019-12-27 15:13:00,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601927595] [2019-12-27 15:13:00,848 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:00,901 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-27 15:13:00,902 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:00,902 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 15:13:00,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:00,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:00,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 15:13:00,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1539496519] [2019-12-27 15:13:00,945 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:00,946 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:00,950 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 34 transitions. [2019-12-27 15:13:00,950 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:00,951 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:00,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 15:13:00,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:00,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 15:13:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:13:00,952 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 18 states. [2019-12-27 15:13:01,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:01,259 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2019-12-27 15:13:01,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 15:13:01,259 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-12-27 15:13:01,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:01,260 INFO L225 Difference]: With dead ends: 56 [2019-12-27 15:13:01,260 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 15:13:01,261 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 15:13:01,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 15:13:01,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-27 15:13:01,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 15:13:01,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 15:13:01,264 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 22 [2019-12-27 15:13:01,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:01,264 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 15:13:01,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 15:13:01,264 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 15:13:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 15:13:01,265 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:01,265 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:01,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:01,468 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 28 times [2019-12-27 15:13:01,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:01,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587248592] [2019-12-27 15:13:01,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:01,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587248592] [2019-12-27 15:13:01,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478324183] [2019-12-27 15:13:01,629 INFO L92 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:01,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:13:01,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:01,678 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 15:13:01,679 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:01,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:01,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 15:13:01,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1273552386] [2019-12-27 15:13:01,711 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:01,713 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:01,731 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 30 transitions. [2019-12-27 15:13:01,731 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:01,732 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:01,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 15:13:01,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:01,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 15:13:01,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-27 15:13:01,732 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 18 states. [2019-12-27 15:13:02,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:02,047 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-27 15:13:02,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 15:13:02,047 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-12-27 15:13:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:02,048 INFO L225 Difference]: With dead ends: 57 [2019-12-27 15:13:02,048 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 15:13:02,049 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 15:13:02,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 15:13:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 15:13:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 15:13:02,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-27 15:13:02,052 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 22 [2019-12-27 15:13:02,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:02,053 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-27 15:13:02,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 15:13:02,053 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-27 15:13:02,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 15:13:02,053 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:02,053 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:02,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:02,257 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:02,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:02,257 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 29 times [2019-12-27 15:13:02,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:02,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708635882] [2019-12-27 15:13:02,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:02,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708635882] [2019-12-27 15:13:02,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22601288] [2019-12-27 15:13:02,399 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:02,454 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-27 15:13:02,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:02,455 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 15:13:02,456 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:02,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:02,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 15:13:02,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1695631338] [2019-12-27 15:13:02,477 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:02,479 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:02,483 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 35 transitions. [2019-12-27 15:13:02,483 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:02,484 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:02,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 15:13:02,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:02,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 15:13:02,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:13:02,485 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 19 states. [2019-12-27 15:13:02,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:02,851 INFO L93 Difference]: Finished difference Result 58 states and 118 transitions. [2019-12-27 15:13:02,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 15:13:02,852 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2019-12-27 15:13:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:02,852 INFO L225 Difference]: With dead ends: 58 [2019-12-27 15:13:02,853 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 15:13:02,853 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=809, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 15:13:02,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 15:13:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2019-12-27 15:13:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-27 15:13:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-27 15:13:02,855 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 23 [2019-12-27 15:13:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:02,856 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-27 15:13:02,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 15:13:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-27 15:13:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 15:13:02,856 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:02,856 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:03,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:03,057 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1239247010, now seen corresponding path program 30 times [2019-12-27 15:13:03,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:03,058 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907012735] [2019-12-27 15:13:03,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:03,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907012735] [2019-12-27 15:13:03,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772579216] [2019-12-27 15:13:03,208 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:03,266 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-27 15:13:03,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:03,267 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 15:13:03,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:03,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:03,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 15:13:03,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1903236393] [2019-12-27 15:13:03,298 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:03,301 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:03,305 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 31 transitions. [2019-12-27 15:13:03,305 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:03,306 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:03,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 15:13:03,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:03,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 15:13:03,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-27 15:13:03,307 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 19 states. [2019-12-27 15:13:03,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:03,688 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-27 15:13:03,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 15:13:03,689 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2019-12-27 15:13:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:03,690 INFO L225 Difference]: With dead ends: 59 [2019-12-27 15:13:03,690 INFO L226 Difference]: Without dead ends: 56 [2019-12-27 15:13:03,691 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=413, Invalid=847, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 15:13:03,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-27 15:13:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-27 15:13:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 15:13:03,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-27 15:13:03,692 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 23 [2019-12-27 15:13:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:03,693 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-27 15:13:03,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 15:13:03,693 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-27 15:13:03,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 15:13:03,693 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:03,694 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:03,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:03,897 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:03,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:03,898 INFO L82 PathProgramCache]: Analyzing trace with hash -501346885, now seen corresponding path program 31 times [2019-12-27 15:13:03,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:03,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297868134] [2019-12-27 15:13:03,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:04,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297868134] [2019-12-27 15:13:04,261 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141626235] [2019-12-27 15:13:04,261 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:04,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 15:13:04,338 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:04,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:04,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 15:13:04,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [508863464] [2019-12-27 15:13:04,368 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:04,373 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:04,382 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 36 transitions. [2019-12-27 15:13:04,382 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:04,385 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:04,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 15:13:04,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:04,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 15:13:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:13:04,387 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 20 states. [2019-12-27 15:13:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:04,777 INFO L93 Difference]: Finished difference Result 60 states and 122 transitions. [2019-12-27 15:13:04,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 15:13:04,777 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-12-27 15:13:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:04,778 INFO L225 Difference]: With dead ends: 60 [2019-12-27 15:13:04,778 INFO L226 Difference]: Without dead ends: 57 [2019-12-27 15:13:04,779 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=426, Invalid=906, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 15:13:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-27 15:13:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-12-27 15:13:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 15:13:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 15:13:04,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 24 [2019-12-27 15:13:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:04,784 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 15:13:04,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 15:13:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 15:13:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 15:13:04,785 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:04,785 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:04,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:04,989 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:04,990 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 32 times [2019-12-27 15:13:04,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:04,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715644615] [2019-12-27 15:13:04,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:05,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715644615] [2019-12-27 15:13:05,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574788233] [2019-12-27 15:13:05,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:05,220 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:13:05,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:05,221 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 15:13:05,222 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:05,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:05,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 15:13:05,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1930944099] [2019-12-27 15:13:05,276 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:05,278 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:05,282 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 32 transitions. [2019-12-27 15:13:05,282 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:05,283 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:05,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 15:13:05,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:05,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 15:13:05,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-27 15:13:05,284 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 20 states. [2019-12-27 15:13:05,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:05,659 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-27 15:13:05,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 15:13:05,660 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-12-27 15:13:05,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:05,661 INFO L225 Difference]: With dead ends: 61 [2019-12-27 15:13:05,661 INFO L226 Difference]: Without dead ends: 58 [2019-12-27 15:13:05,662 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=460, Invalid=946, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 15:13:05,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-27 15:13:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-27 15:13:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 15:13:05,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-27 15:13:05,665 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 24 [2019-12-27 15:13:05,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:05,665 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-27 15:13:05,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 15:13:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-27 15:13:05,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 15:13:05,666 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:05,666 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:05,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:05,870 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:05,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:05,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1638116054, now seen corresponding path program 33 times [2019-12-27 15:13:05,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:05,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939759859] [2019-12-27 15:13:05,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:06,066 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:06,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939759859] [2019-12-27 15:13:06,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567708926] [2019-12-27 15:13:06,066 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:06,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-27 15:13:06,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:06,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 15:13:06,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:06,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:06,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 15:13:06,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1811184817] [2019-12-27 15:13:06,157 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:06,159 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:06,166 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 37 transitions. [2019-12-27 15:13:06,166 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:06,167 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:06,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 15:13:06,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:06,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 15:13:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:13:06,168 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 21 states. [2019-12-27 15:13:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:06,618 INFO L93 Difference]: Finished difference Result 62 states and 126 transitions. [2019-12-27 15:13:06,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 15:13:06,618 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-12-27 15:13:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:06,619 INFO L225 Difference]: With dead ends: 62 [2019-12-27 15:13:06,619 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 15:13:06,620 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=473, Invalid=1009, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 15:13:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 15:13:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2019-12-27 15:13:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-27 15:13:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-27 15:13:06,623 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 25 [2019-12-27 15:13:06,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:06,623 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-27 15:13:06,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 15:13:06,623 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-27 15:13:06,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 15:13:06,624 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:06,624 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:06,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:06,825 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:06,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:06,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1210445130, now seen corresponding path program 34 times [2019-12-27 15:13:06,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:06,826 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154012404] [2019-12-27 15:13:06,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:07,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154012404] [2019-12-27 15:13:07,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999510166] [2019-12-27 15:13:07,019 INFO L92 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:07,079 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:13:07,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:07,080 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 15:13:07,082 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:07,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:07,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 15:13:07,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [437405594] [2019-12-27 15:13:07,105 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:07,107 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:07,111 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 33 transitions. [2019-12-27 15:13:07,111 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:07,112 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:07,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 15:13:07,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:07,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 15:13:07,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 15:13:07,113 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 21 states. [2019-12-27 15:13:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:07,525 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-27 15:13:07,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 15:13:07,525 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-12-27 15:13:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:07,526 INFO L225 Difference]: With dead ends: 63 [2019-12-27 15:13:07,526 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 15:13:07,527 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=509, Invalid=1051, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 15:13:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 15:13:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 15:13:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 15:13:07,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2019-12-27 15:13:07,530 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 25 [2019-12-27 15:13:07,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:07,531 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2019-12-27 15:13:07,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 15:13:07,531 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2019-12-27 15:13:07,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 15:13:07,531 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:07,531 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:07,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:07,735 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 35 times [2019-12-27 15:13:07,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:07,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185857726] [2019-12-27 15:13:07,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:07,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185857726] [2019-12-27 15:13:07,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722652914] [2019-12-27 15:13:07,937 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:07,994 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-27 15:13:07,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:07,995 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 15:13:07,996 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:08,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:08,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 15:13:08,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [737761591] [2019-12-27 15:13:08,018 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:08,020 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:08,025 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 38 transitions. [2019-12-27 15:13:08,025 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:08,026 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:08,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 15:13:08,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 15:13:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:13:08,027 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand 22 states. [2019-12-27 15:13:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:08,464 INFO L93 Difference]: Finished difference Result 64 states and 130 transitions. [2019-12-27 15:13:08,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 15:13:08,464 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-12-27 15:13:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:08,465 INFO L225 Difference]: With dead ends: 64 [2019-12-27 15:13:08,465 INFO L226 Difference]: Without dead ends: 61 [2019-12-27 15:13:08,467 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1117, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 15:13:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-27 15:13:08,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2019-12-27 15:13:08,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 15:13:08,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 15:13:08,469 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 26 [2019-12-27 15:13:08,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:08,469 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 15:13:08,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 15:13:08,469 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 15:13:08,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 15:13:08,470 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:08,470 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:08,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:08,672 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:08,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906329, now seen corresponding path program 36 times [2019-12-27 15:13:08,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:08,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418298422] [2019-12-27 15:13:08,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:08,960 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:08,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418298422] [2019-12-27 15:13:08,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968696221] [2019-12-27 15:13:08,961 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:09,050 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-27 15:13:09,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:09,053 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 15:13:09,054 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:09,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:09,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 15:13:09,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [961281903] [2019-12-27 15:13:09,089 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:09,095 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:09,104 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 34 transitions. [2019-12-27 15:13:09,104 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:09,105 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:09,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 15:13:09,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 15:13:09,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-27 15:13:09,107 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 22 states. [2019-12-27 15:13:09,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:09,555 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-27 15:13:09,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 15:13:09,555 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-12-27 15:13:09,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:09,556 INFO L225 Difference]: With dead ends: 65 [2019-12-27 15:13:09,556 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 15:13:09,557 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 15:13:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 15:13:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-27 15:13:09,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 15:13:09,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2019-12-27 15:13:09,559 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 26 [2019-12-27 15:13:09,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:09,559 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2019-12-27 15:13:09,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 15:13:09,560 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2019-12-27 15:13:09,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 15:13:09,561 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:09,561 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:09,764 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:09,765 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:09,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:09,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2023467666, now seen corresponding path program 37 times [2019-12-27 15:13:09,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:09,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17537708] [2019-12-27 15:13:09,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:09,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17537708] [2019-12-27 15:13:09,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442125395] [2019-12-27 15:13:09,984 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:10,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 15:13:10,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:10,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:10,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 15:13:10,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [561650400] [2019-12-27 15:13:10,064 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:10,067 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:10,075 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 39 transitions. [2019-12-27 15:13:10,075 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:10,076 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:10,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 15:13:10,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 15:13:10,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:13:10,077 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand 23 states. [2019-12-27 15:13:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:10,557 INFO L93 Difference]: Finished difference Result 66 states and 134 transitions. [2019-12-27 15:13:10,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 15:13:10,558 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2019-12-27 15:13:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:10,558 INFO L225 Difference]: With dead ends: 66 [2019-12-27 15:13:10,559 INFO L226 Difference]: Without dead ends: 63 [2019-12-27 15:13:10,560 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=575, Invalid=1231, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 15:13:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-27 15:13:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-12-27 15:13:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 15:13:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 80 transitions. [2019-12-27 15:13:10,562 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 80 transitions. Word has length 27 [2019-12-27 15:13:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:10,562 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 80 transitions. [2019-12-27 15:13:10,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 15:13:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 80 transitions. [2019-12-27 15:13:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 15:13:10,562 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:10,562 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:10,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:10,763 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:10,764 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 38 times [2019-12-27 15:13:10,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:10,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613805512] [2019-12-27 15:13:10,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:10,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613805512] [2019-12-27 15:13:10,970 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001689230] [2019-12-27 15:13:10,971 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:11,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:13:11,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:11,027 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 15:13:11,028 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:11,046 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:11,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:11,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 15:13:11,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [287755961] [2019-12-27 15:13:11,047 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:11,050 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:11,055 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 35 transitions. [2019-12-27 15:13:11,055 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:11,056 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:11,056 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 15:13:11,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:11,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 15:13:11,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:13:11,057 INFO L87 Difference]: Start difference. First operand 39 states and 80 transitions. Second operand 23 states. [2019-12-27 15:13:11,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:11,510 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-27 15:13:11,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 15:13:11,511 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2019-12-27 15:13:11,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:11,512 INFO L225 Difference]: With dead ends: 67 [2019-12-27 15:13:11,512 INFO L226 Difference]: Without dead ends: 64 [2019-12-27 15:13:11,513 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=615, Invalid=1277, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 15:13:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-27 15:13:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-27 15:13:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 15:13:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2019-12-27 15:13:11,515 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 27 [2019-12-27 15:13:11,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:11,516 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2019-12-27 15:13:11,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 15:13:11,516 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2019-12-27 15:13:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 15:13:11,516 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:11,517 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:11,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:11,720 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:11,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 39 times [2019-12-27 15:13:11,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:11,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855894870] [2019-12-27 15:13:11,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:11,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855894870] [2019-12-27 15:13:11,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383076969] [2019-12-27 15:13:11,935 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:11,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-27 15:13:11,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:12,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-27 15:13:12,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:12,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:12,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 15:13:12,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1134801109] [2019-12-27 15:13:12,041 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:12,043 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:12,049 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 35 states and 40 transitions. [2019-12-27 15:13:12,049 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:12,050 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:12,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 15:13:12,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:12,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 15:13:12,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:13:12,051 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand 24 states. [2019-12-27 15:13:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:12,541 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2019-12-27 15:13:12,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 15:13:12,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2019-12-27 15:13:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:12,542 INFO L225 Difference]: With dead ends: 68 [2019-12-27 15:13:12,542 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 15:13:12,543 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=1350, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 15:13:12,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 15:13:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2019-12-27 15:13:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 15:13:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-27 15:13:12,546 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 28 [2019-12-27 15:13:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:12,546 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-27 15:13:12,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 15:13:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-27 15:13:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 15:13:12,546 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:12,546 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:12,747 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:12,747 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:12,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:12,748 INFO L82 PathProgramCache]: Analyzing trace with hash -174254209, now seen corresponding path program 40 times [2019-12-27 15:13:12,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:12,749 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582695796] [2019-12-27 15:13:12,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:12,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582695796] [2019-12-27 15:13:12,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959904449] [2019-12-27 15:13:12,944 INFO L92 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:12,997 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:13:12,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:12,998 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-27 15:13:12,999 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:13,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:13,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 15:13:13,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1984143027] [2019-12-27 15:13:13,038 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:13,040 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:13,046 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 36 transitions. [2019-12-27 15:13:13,046 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:13,046 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:13,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 15:13:13,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:13,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 15:13:13,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2019-12-27 15:13:13,047 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 24 states. [2019-12-27 15:13:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:13,529 INFO L93 Difference]: Finished difference Result 69 states and 140 transitions. [2019-12-27 15:13:13,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 15:13:13,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2019-12-27 15:13:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:13,530 INFO L225 Difference]: With dead ends: 69 [2019-12-27 15:13:13,531 INFO L226 Difference]: Without dead ends: 66 [2019-12-27 15:13:13,532 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=672, Invalid=1398, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 15:13:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-27 15:13:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-12-27 15:13:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-27 15:13:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 134 transitions. [2019-12-27 15:13:13,535 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 134 transitions. Word has length 28 [2019-12-27 15:13:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:13,535 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 134 transitions. [2019-12-27 15:13:13,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 15:13:13,535 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 134 transitions. [2019-12-27 15:13:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 15:13:13,536 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:13,536 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:13,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:13,739 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:13,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1067760134, now seen corresponding path program 41 times [2019-12-27 15:13:13,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:13,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243429811] [2019-12-27 15:13:13,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:14,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243429811] [2019-12-27 15:13:14,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850485306] [2019-12-27 15:13:14,030 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:14,098 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-27 15:13:14,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:14,100 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 15:13:14,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:14,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:14,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 15:13:14,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [720110519] [2019-12-27 15:13:14,132 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:14,135 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:14,143 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 41 transitions. [2019-12-27 15:13:14,143 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:14,144 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:14,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 15:13:14,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:14,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 15:13:14,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:13:14,146 INFO L87 Difference]: Start difference. First operand 66 states and 134 transitions. Second operand 25 states. [2019-12-27 15:13:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:14,666 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2019-12-27 15:13:14,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 15:13:14,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2019-12-27 15:13:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:14,667 INFO L225 Difference]: With dead ends: 70 [2019-12-27 15:13:14,667 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 15:13:14,668 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=687, Invalid=1475, Unknown=0, NotChecked=0, Total=2162 [2019-12-27 15:13:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 15:13:14,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2019-12-27 15:13:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-27 15:13:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-12-27 15:13:14,671 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 29 [2019-12-27 15:13:14,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:14,671 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-12-27 15:13:14,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 15:13:14,672 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-12-27 15:13:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 15:13:14,672 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:14,672 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:14,875 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:14,876 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:14,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:14,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1106913126, now seen corresponding path program 42 times [2019-12-27 15:13:14,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:14,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151902311] [2019-12-27 15:13:14,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:15,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151902311] [2019-12-27 15:13:15,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489136139] [2019-12-27 15:13:15,108 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:15,166 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-27 15:13:15,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:15,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 15:13:15,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:15,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:15,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 15:13:15,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [14461089] [2019-12-27 15:13:15,201 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:15,204 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:15,210 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 37 transitions. [2019-12-27 15:13:15,210 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:15,210 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:15,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 15:13:15,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 15:13:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-12-27 15:13:15,212 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 25 states. [2019-12-27 15:13:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:15,792 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2019-12-27 15:13:15,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 15:13:15,793 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2019-12-27 15:13:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:15,794 INFO L225 Difference]: With dead ends: 71 [2019-12-27 15:13:15,794 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 15:13:15,796 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=731, Invalid=1525, Unknown=0, NotChecked=0, Total=2256 [2019-12-27 15:13:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 15:13:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-27 15:13:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-27 15:13:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 138 transitions. [2019-12-27 15:13:15,803 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 138 transitions. Word has length 29 [2019-12-27 15:13:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:15,803 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 138 transitions. [2019-12-27 15:13:15,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 15:13:15,803 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 138 transitions. [2019-12-27 15:13:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 15:13:15,804 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:15,804 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:16,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:16,009 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:16,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1259174157, now seen corresponding path program 43 times [2019-12-27 15:13:16,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:16,010 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277654483] [2019-12-27 15:13:16,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:16,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277654483] [2019-12-27 15:13:16,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140315233] [2019-12-27 15:13:16,339 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:16,408 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 15:13:16,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:16,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:16,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 15:13:16,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [436261252] [2019-12-27 15:13:16,437 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:16,442 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:16,450 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 37 states and 42 transitions. [2019-12-27 15:13:16,451 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:16,451 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:16,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 15:13:16,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:16,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 15:13:16,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:13:16,453 INFO L87 Difference]: Start difference. First operand 68 states and 138 transitions. Second operand 26 states. [2019-12-27 15:13:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:16,988 INFO L93 Difference]: Finished difference Result 72 states and 146 transitions. [2019-12-27 15:13:16,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 15:13:16,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-12-27 15:13:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:16,990 INFO L225 Difference]: With dead ends: 72 [2019-12-27 15:13:16,990 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 15:13:16,991 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=747, Invalid=1605, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 15:13:16,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 15:13:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2019-12-27 15:13:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 15:13:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-27 15:13:16,994 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 30 [2019-12-27 15:13:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:16,994 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-27 15:13:16,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 15:13:16,994 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-27 15:13:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 15:13:16,995 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:16,995 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:17,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:17,198 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:17,198 INFO L82 PathProgramCache]: Analyzing trace with hash 45431767, now seen corresponding path program 44 times [2019-12-27 15:13:17,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:17,199 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186373745] [2019-12-27 15:13:17,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:17,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186373745] [2019-12-27 15:13:17,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478793165] [2019-12-27 15:13:17,427 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:17,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:13:17,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:17,498 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 15:13:17,499 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:17,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:17,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 15:13:17,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1860216880] [2019-12-27 15:13:17,521 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:17,524 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:17,532 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 35 states and 38 transitions. [2019-12-27 15:13:17,532 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:17,533 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:17,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 15:13:17,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:17,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 15:13:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-12-27 15:13:17,534 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 26 states. [2019-12-27 15:13:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:18,089 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2019-12-27 15:13:18,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 15:13:18,090 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-12-27 15:13:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:18,091 INFO L225 Difference]: With dead ends: 73 [2019-12-27 15:13:18,091 INFO L226 Difference]: Without dead ends: 70 [2019-12-27 15:13:18,092 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=793, Invalid=1657, Unknown=0, NotChecked=0, Total=2450 [2019-12-27 15:13:18,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-27 15:13:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-27 15:13:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 15:13:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2019-12-27 15:13:18,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 30 [2019-12-27 15:13:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:18,095 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2019-12-27 15:13:18,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 15:13:18,096 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2019-12-27 15:13:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 15:13:18,096 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:18,096 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:18,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:18,299 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:18,300 INFO L82 PathProgramCache]: Analyzing trace with hash -379692898, now seen corresponding path program 45 times [2019-12-27 15:13:18,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:18,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278995639] [2019-12-27 15:13:18,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:18,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278995639] [2019-12-27 15:13:18,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847132121] [2019-12-27 15:13:18,541 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:18,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-27 15:13:18,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:18,603 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 15:13:18,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:18,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:18,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 15:13:18,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [895740668] [2019-12-27 15:13:18,624 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:18,627 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:18,635 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 38 states and 43 transitions. [2019-12-27 15:13:18,635 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:18,636 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:18,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 15:13:18,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 15:13:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2019-12-27 15:13:18,636 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand 27 states. [2019-12-27 15:13:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:19,328 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-27 15:13:19,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 15:13:19,329 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2019-12-27 15:13:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:19,329 INFO L225 Difference]: With dead ends: 74 [2019-12-27 15:13:19,329 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 15:13:19,330 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=809, Invalid=1741, Unknown=0, NotChecked=0, Total=2550 [2019-12-27 15:13:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 15:13:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2019-12-27 15:13:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-27 15:13:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2019-12-27 15:13:19,332 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 31 [2019-12-27 15:13:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:19,333 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2019-12-27 15:13:19,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 15:13:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2019-12-27 15:13:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 15:13:19,333 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:19,333 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:19,534 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:19,534 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:19,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1408384834, now seen corresponding path program 46 times [2019-12-27 15:13:19,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:19,536 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796636545] [2019-12-27 15:13:19,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:19,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796636545] [2019-12-27 15:13:19,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965479378] [2019-12-27 15:13:19,824 INFO L92 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:19,882 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:13:19,882 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:19,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 15:13:19,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:19,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:19,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 15:13:19,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [868043082] [2019-12-27 15:13:19,906 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:19,910 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:19,920 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 39 transitions. [2019-12-27 15:13:19,920 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:19,921 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:19,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 15:13:19,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 15:13:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2019-12-27 15:13:19,922 INFO L87 Difference]: Start difference. First operand 43 states and 88 transitions. Second operand 27 states. [2019-12-27 15:13:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:20,518 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2019-12-27 15:13:20,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 15:13:20,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2019-12-27 15:13:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:20,526 INFO L225 Difference]: With dead ends: 75 [2019-12-27 15:13:20,526 INFO L226 Difference]: Without dead ends: 72 [2019-12-27 15:13:20,527 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=857, Invalid=1795, Unknown=0, NotChecked=0, Total=2652 [2019-12-27 15:13:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-27 15:13:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-27 15:13:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 15:13:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 146 transitions. [2019-12-27 15:13:20,529 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 146 transitions. Word has length 31 [2019-12-27 15:13:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:20,529 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 146 transitions. [2019-12-27 15:13:20,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 15:13:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 146 transitions. [2019-12-27 15:13:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 15:13:20,530 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:20,530 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:20,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:20,731 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1114422107, now seen corresponding path program 47 times [2019-12-27 15:13:20,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:20,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611816951] [2019-12-27 15:13:20,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:21,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611816951] [2019-12-27 15:13:21,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936145518] [2019-12-27 15:13:21,003 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:21,072 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-12-27 15:13:21,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:21,074 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 15:13:21,075 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:21,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:21,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 15:13:21,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [75324151] [2019-12-27 15:13:21,100 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:21,105 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:21,116 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 39 states and 44 transitions. [2019-12-27 15:13:21,116 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:21,117 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:21,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 15:13:21,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:21,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 15:13:21,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-27 15:13:21,119 INFO L87 Difference]: Start difference. First operand 72 states and 146 transitions. Second operand 28 states. [2019-12-27 15:13:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:21,734 INFO L93 Difference]: Finished difference Result 76 states and 154 transitions. [2019-12-27 15:13:21,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 15:13:21,735 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2019-12-27 15:13:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:21,735 INFO L225 Difference]: With dead ends: 76 [2019-12-27 15:13:21,736 INFO L226 Difference]: Without dead ends: 73 [2019-12-27 15:13:21,736 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=874, Invalid=1882, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 15:13:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-27 15:13:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2019-12-27 15:13:21,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-27 15:13:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-27 15:13:21,738 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 32 [2019-12-27 15:13:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:21,739 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-27 15:13:21,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 15:13:21,739 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-27 15:13:21,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 15:13:21,739 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:21,739 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:21,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:21,943 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:21,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:21,943 INFO L82 PathProgramCache]: Analyzing trace with hash 710257199, now seen corresponding path program 48 times [2019-12-27 15:13:21,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:21,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478226128] [2019-12-27 15:13:21,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:22,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478226128] [2019-12-27 15:13:22,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131371704] [2019-12-27 15:13:22,215 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:22,281 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-27 15:13:22,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:22,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 15:13:22,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:22,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:22,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 15:13:22,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1801231681] [2019-12-27 15:13:22,322 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:22,326 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:22,336 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 37 states and 40 transitions. [2019-12-27 15:13:22,336 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:22,337 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:22,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 15:13:22,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:22,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 15:13:22,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-27 15:13:22,338 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 28 states. [2019-12-27 15:13:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:22,949 INFO L93 Difference]: Finished difference Result 77 states and 156 transitions. [2019-12-27 15:13:22,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 15:13:22,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2019-12-27 15:13:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:22,951 INFO L225 Difference]: With dead ends: 77 [2019-12-27 15:13:22,951 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 15:13:22,951 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=924, Invalid=1938, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 15:13:22,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 15:13:22,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-27 15:13:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 15:13:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2019-12-27 15:13:22,954 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 32 [2019-12-27 15:13:22,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:22,954 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2019-12-27 15:13:22,954 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 15:13:22,954 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2019-12-27 15:13:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 15:13:22,954 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:22,955 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:23,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:23,155 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:23,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:23,156 INFO L82 PathProgramCache]: Analyzing trace with hash 187347254, now seen corresponding path program 49 times [2019-12-27 15:13:23,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:23,157 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764068326] [2019-12-27 15:13:23,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:23,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764068326] [2019-12-27 15:13:23,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653217424] [2019-12-27 15:13:23,468 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:23,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 15:13:23,523 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:23,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:23,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 15:13:23,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [937262280] [2019-12-27 15:13:23,563 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:23,566 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:23,573 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 40 states and 45 transitions. [2019-12-27 15:13:23,574 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:23,574 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:23,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 15:13:23,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 15:13:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-12-27 15:13:23,575 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand 29 states. [2019-12-27 15:13:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:24,232 INFO L93 Difference]: Finished difference Result 78 states and 158 transitions. [2019-12-27 15:13:24,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 15:13:24,232 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2019-12-27 15:13:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:24,234 INFO L225 Difference]: With dead ends: 78 [2019-12-27 15:13:24,234 INFO L226 Difference]: Without dead ends: 75 [2019-12-27 15:13:24,234 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=941, Invalid=2029, Unknown=0, NotChecked=0, Total=2970 [2019-12-27 15:13:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-27 15:13:24,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2019-12-27 15:13:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-27 15:13:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 92 transitions. [2019-12-27 15:13:24,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 92 transitions. Word has length 33 [2019-12-27 15:13:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:24,238 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 92 transitions. [2019-12-27 15:13:24,238 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 15:13:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 92 transitions. [2019-12-27 15:13:24,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 15:13:24,239 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:24,239 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:24,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:24,440 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:24,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:24,441 INFO L82 PathProgramCache]: Analyzing trace with hash 543136746, now seen corresponding path program 50 times [2019-12-27 15:13:24,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:24,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827851923] [2019-12-27 15:13:24,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:24,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827851923] [2019-12-27 15:13:24,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548640475] [2019-12-27 15:13:24,742 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:24,797 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:13:24,797 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:24,799 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 15:13:24,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:24,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:24,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 15:13:24,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1426769058] [2019-12-27 15:13:24,847 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:24,849 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:24,858 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 38 states and 41 transitions. [2019-12-27 15:13:24,858 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:24,859 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:24,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 15:13:24,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:24,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 15:13:24,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-12-27 15:13:24,860 INFO L87 Difference]: Start difference. First operand 45 states and 92 transitions. Second operand 29 states. [2019-12-27 15:13:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:25,505 INFO L93 Difference]: Finished difference Result 79 states and 160 transitions. [2019-12-27 15:13:25,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 15:13:25,506 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2019-12-27 15:13:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:25,507 INFO L225 Difference]: With dead ends: 79 [2019-12-27 15:13:25,507 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 15:13:25,507 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=993, Invalid=2087, Unknown=0, NotChecked=0, Total=3080 [2019-12-27 15:13:25,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 15:13:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-12-27 15:13:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 15:13:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2019-12-27 15:13:25,512 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 33 [2019-12-27 15:13:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:25,512 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2019-12-27 15:13:25,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 15:13:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2019-12-27 15:13:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 15:13:25,514 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:25,514 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:25,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:25,717 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1512797635, now seen corresponding path program 51 times [2019-12-27 15:13:25,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:25,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033064560] [2019-12-27 15:13:25,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:26,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033064560] [2019-12-27 15:13:26,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771835171] [2019-12-27 15:13:26,046 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:26,114 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-27 15:13:26,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:26,116 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 15:13:26,118 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:26,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:26,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 15:13:26,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [723820758] [2019-12-27 15:13:26,151 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:26,154 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:26,162 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 41 states and 46 transitions. [2019-12-27 15:13:26,162 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:26,163 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:26,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 15:13:26,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:26,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 15:13:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-12-27 15:13:26,164 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand 30 states. [2019-12-27 15:13:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:26,844 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2019-12-27 15:13:26,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 15:13:26,845 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2019-12-27 15:13:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:26,846 INFO L225 Difference]: With dead ends: 80 [2019-12-27 15:13:26,846 INFO L226 Difference]: Without dead ends: 77 [2019-12-27 15:13:26,847 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1011, Invalid=2181, Unknown=0, NotChecked=0, Total=3192 [2019-12-27 15:13:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-27 15:13:26,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2019-12-27 15:13:26,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-27 15:13:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-27 15:13:26,850 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 34 [2019-12-27 15:13:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:26,850 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-27 15:13:26,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 15:13:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-27 15:13:26,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 15:13:26,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:26,850 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:27,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:27,051 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:27,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:27,052 INFO L82 PathProgramCache]: Analyzing trace with hash -342629753, now seen corresponding path program 52 times [2019-12-27 15:13:27,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:27,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867335813] [2019-12-27 15:13:27,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:27,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867335813] [2019-12-27 15:13:27,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167285911] [2019-12-27 15:13:27,353 INFO L92 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:27,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:13:27,408 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:27,409 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 15:13:27,410 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:27,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:27,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 15:13:27,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1590869380] [2019-12-27 15:13:27,445 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:27,449 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:27,457 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 39 states and 42 transitions. [2019-12-27 15:13:27,457 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:27,458 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:27,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 15:13:27,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:27,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 15:13:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-12-27 15:13:27,459 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 30 states. [2019-12-27 15:13:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:28,160 INFO L93 Difference]: Finished difference Result 81 states and 164 transitions. [2019-12-27 15:13:28,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 15:13:28,161 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2019-12-27 15:13:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:28,162 INFO L225 Difference]: With dead ends: 81 [2019-12-27 15:13:28,162 INFO L226 Difference]: Without dead ends: 78 [2019-12-27 15:13:28,163 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1065, Invalid=2241, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 15:13:28,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-27 15:13:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-27 15:13:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-27 15:13:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2019-12-27 15:13:28,166 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 34 [2019-12-27 15:13:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:28,166 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2019-12-27 15:13:28,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 15:13:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2019-12-27 15:13:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 15:13:28,167 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:28,167 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:28,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:28,370 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash -347913266, now seen corresponding path program 53 times [2019-12-27 15:13:28,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:28,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628012194] [2019-12-27 15:13:28,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:28,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:28,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628012194] [2019-12-27 15:13:28,687 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007106968] [2019-12-27 15:13:28,687 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:28,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-12-27 15:13:28,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:28,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 15:13:28,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:28,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:28,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 15:13:28,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [675903357] [2019-12-27 15:13:28,795 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:28,800 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:28,813 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 42 states and 47 transitions. [2019-12-27 15:13:28,813 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:28,814 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:28,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 15:13:28,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:28,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 15:13:28,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-27 15:13:28,816 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand 31 states. [2019-12-27 15:13:29,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:29,549 INFO L93 Difference]: Finished difference Result 82 states and 166 transitions. [2019-12-27 15:13:29,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 15:13:29,550 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2019-12-27 15:13:29,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:29,550 INFO L225 Difference]: With dead ends: 82 [2019-12-27 15:13:29,551 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 15:13:29,551 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1083, Invalid=2339, Unknown=0, NotChecked=0, Total=3422 [2019-12-27 15:13:29,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 15:13:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2019-12-27 15:13:29,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 15:13:29,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 96 transitions. [2019-12-27 15:13:29,553 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 96 transitions. Word has length 35 [2019-12-27 15:13:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:29,554 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 96 transitions. [2019-12-27 15:13:29,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 15:13:29,554 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 96 transitions. [2019-12-27 15:13:29,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 15:13:29,554 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:29,554 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:29,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:29,756 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:29,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2031587694, now seen corresponding path program 54 times [2019-12-27 15:13:29,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:29,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233372164] [2019-12-27 15:13:29,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:30,067 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233372164] [2019-12-27 15:13:30,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549631755] [2019-12-27 15:13:30,068 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:30,135 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-12-27 15:13:30,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:30,137 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 15:13:30,137 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:30,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:30,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 15:13:30,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [903311477] [2019-12-27 15:13:30,160 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:30,163 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:30,172 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 40 states and 43 transitions. [2019-12-27 15:13:30,172 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:30,173 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:30,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 15:13:30,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:30,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 15:13:30,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-27 15:13:30,173 INFO L87 Difference]: Start difference. First operand 47 states and 96 transitions. Second operand 31 states. [2019-12-27 15:13:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:30,900 INFO L93 Difference]: Finished difference Result 83 states and 168 transitions. [2019-12-27 15:13:30,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 15:13:30,900 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2019-12-27 15:13:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:30,901 INFO L225 Difference]: With dead ends: 83 [2019-12-27 15:13:30,902 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 15:13:30,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1139, Invalid=2401, Unknown=0, NotChecked=0, Total=3540 [2019-12-27 15:13:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 15:13:30,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-27 15:13:30,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 15:13:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2019-12-27 15:13:30,905 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 35 [2019-12-27 15:13:30,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:30,905 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2019-12-27 15:13:30,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 15:13:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2019-12-27 15:13:30,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 15:13:30,906 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:30,906 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:31,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:31,107 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:31,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:31,107 INFO L82 PathProgramCache]: Analyzing trace with hash 2099590699, now seen corresponding path program 55 times [2019-12-27 15:13:31,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:31,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355628926] [2019-12-27 15:13:31,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:31,448 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355628926] [2019-12-27 15:13:31,449 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102467135] [2019-12-27 15:13:31,449 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:31,503 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 15:13:31,504 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:31,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:31,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 15:13:31,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1144044332] [2019-12-27 15:13:31,529 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:31,533 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:31,542 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 43 states and 48 transitions. [2019-12-27 15:13:31,543 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:31,543 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:31,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 15:13:31,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:31,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 15:13:31,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 15:13:31,544 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 32 states. [2019-12-27 15:13:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:32,310 INFO L93 Difference]: Finished difference Result 84 states and 170 transitions. [2019-12-27 15:13:32,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 15:13:32,310 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2019-12-27 15:13:32,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:32,312 INFO L225 Difference]: With dead ends: 84 [2019-12-27 15:13:32,312 INFO L226 Difference]: Without dead ends: 81 [2019-12-27 15:13:32,313 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1158, Invalid=2502, Unknown=0, NotChecked=0, Total=3660 [2019-12-27 15:13:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-27 15:13:32,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2019-12-27 15:13:32,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-27 15:13:32,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-27 15:13:32,314 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 36 [2019-12-27 15:13:32,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:32,315 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-27 15:13:32,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 15:13:32,315 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-27 15:13:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 15:13:32,315 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:32,315 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:32,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:32,516 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:32,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:32,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1445291231, now seen corresponding path program 56 times [2019-12-27 15:13:32,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:32,518 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537813212] [2019-12-27 15:13:32,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:32,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537813212] [2019-12-27 15:13:32,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667481439] [2019-12-27 15:13:32,844 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:32,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:13:32,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:32,905 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 15:13:32,906 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:32,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:32,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 15:13:32,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1564872391] [2019-12-27 15:13:32,951 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:32,955 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:32,988 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 41 states and 44 transitions. [2019-12-27 15:13:32,988 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:32,989 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:32,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 15:13:32,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 15:13:32,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 15:13:32,990 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 32 states. [2019-12-27 15:13:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:34,012 INFO L93 Difference]: Finished difference Result 85 states and 172 transitions. [2019-12-27 15:13:34,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 15:13:34,013 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2019-12-27 15:13:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:34,013 INFO L225 Difference]: With dead ends: 85 [2019-12-27 15:13:34,014 INFO L226 Difference]: Without dead ends: 82 [2019-12-27 15:13:34,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1216, Invalid=2566, Unknown=0, NotChecked=0, Total=3782 [2019-12-27 15:13:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-27 15:13:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-12-27 15:13:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-27 15:13:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2019-12-27 15:13:34,017 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 36 [2019-12-27 15:13:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:34,017 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2019-12-27 15:13:34,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 15:13:34,018 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2019-12-27 15:13:34,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 15:13:34,018 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:34,018 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:34,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:34,222 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:34,223 INFO L82 PathProgramCache]: Analyzing trace with hash 662802534, now seen corresponding path program 57 times [2019-12-27 15:13:34,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:34,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985919836] [2019-12-27 15:13:34,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:34,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985919836] [2019-12-27 15:13:34,573 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257545858] [2019-12-27 15:13:34,573 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:34,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-27 15:13:34,644 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:34,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 15:13:34,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:34,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:34,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 15:13:34,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [367718638] [2019-12-27 15:13:34,672 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:34,676 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:34,687 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 44 states and 49 transitions. [2019-12-27 15:13:34,687 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:34,688 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:34,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 15:13:34,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 15:13:34,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 15:13:34,689 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand 33 states. [2019-12-27 15:13:35,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:35,495 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2019-12-27 15:13:35,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 15:13:35,495 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2019-12-27 15:13:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:35,496 INFO L225 Difference]: With dead ends: 86 [2019-12-27 15:13:35,496 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 15:13:35,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1235, Invalid=2671, Unknown=0, NotChecked=0, Total=3906 [2019-12-27 15:13:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 15:13:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2019-12-27 15:13:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-27 15:13:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 100 transitions. [2019-12-27 15:13:35,500 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 100 transitions. Word has length 37 [2019-12-27 15:13:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:35,500 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 100 transitions. [2019-12-27 15:13:35,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 15:13:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 100 transitions. [2019-12-27 15:13:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 15:13:35,501 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:35,501 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:35,704 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:35,705 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:35,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1854355258, now seen corresponding path program 58 times [2019-12-27 15:13:35,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:35,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076108552] [2019-12-27 15:13:35,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:36,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076108552] [2019-12-27 15:13:36,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75306678] [2019-12-27 15:13:36,156 INFO L92 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:36,254 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:13:36,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:36,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 15:13:36,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:36,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:36,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 15:13:36,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323401418] [2019-12-27 15:13:36,313 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:36,323 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:36,342 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 42 states and 45 transitions. [2019-12-27 15:13:36,343 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:36,344 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:36,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 15:13:36,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:36,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 15:13:36,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 15:13:36,345 INFO L87 Difference]: Start difference. First operand 49 states and 100 transitions. Second operand 33 states. [2019-12-27 15:13:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:37,246 INFO L93 Difference]: Finished difference Result 87 states and 176 transitions. [2019-12-27 15:13:37,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 15:13:37,246 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2019-12-27 15:13:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:37,247 INFO L225 Difference]: With dead ends: 87 [2019-12-27 15:13:37,247 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 15:13:37,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1295, Invalid=2737, Unknown=0, NotChecked=0, Total=4032 [2019-12-27 15:13:37,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 15:13:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-27 15:13:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 15:13:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2019-12-27 15:13:37,252 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 37 [2019-12-27 15:13:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:37,252 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2019-12-27 15:13:37,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 15:13:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2019-12-27 15:13:37,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 15:13:37,253 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:37,253 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:37,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:37,457 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -927957869, now seen corresponding path program 59 times [2019-12-27 15:13:37,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:37,457 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113921412] [2019-12-27 15:13:37,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:37,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113921412] [2019-12-27 15:13:37,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570953503] [2019-12-27 15:13:37,852 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:37,920 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-12-27 15:13:37,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:37,921 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 15:13:37,922 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:37,965 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:37,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:37,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 15:13:37,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [32063206] [2019-12-27 15:13:37,966 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:37,971 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:37,982 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 45 states and 50 transitions. [2019-12-27 15:13:37,982 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:37,983 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:37,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 15:13:37,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:37,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 15:13:37,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 15:13:37,983 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand 34 states. [2019-12-27 15:13:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:38,815 INFO L93 Difference]: Finished difference Result 88 states and 178 transitions. [2019-12-27 15:13:38,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 15:13:38,816 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2019-12-27 15:13:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:38,817 INFO L225 Difference]: With dead ends: 88 [2019-12-27 15:13:38,817 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 15:13:38,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1315, Invalid=2845, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 15:13:38,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 15:13:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2019-12-27 15:13:38,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 15:13:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-27 15:13:38,821 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 38 [2019-12-27 15:13:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:38,821 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-27 15:13:38,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 15:13:38,821 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-27 15:13:38,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 15:13:38,822 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:38,822 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:39,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:39,025 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:39,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:39,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1650438455, now seen corresponding path program 60 times [2019-12-27 15:13:39,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:39,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629048118] [2019-12-27 15:13:39,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:39,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629048118] [2019-12-27 15:13:39,363 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529215055] [2019-12-27 15:13:39,364 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:39,442 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-12-27 15:13:39,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:39,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 15:13:39,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:39,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:39,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 15:13:39,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1249777950] [2019-12-27 15:13:39,472 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:39,478 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:39,493 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 43 states and 46 transitions. [2019-12-27 15:13:39,493 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:39,494 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:39,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 15:13:39,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:39,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 15:13:39,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 15:13:39,495 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 34 states. [2019-12-27 15:13:40,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:40,872 INFO L93 Difference]: Finished difference Result 89 states and 180 transitions. [2019-12-27 15:13:40,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 15:13:40,873 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2019-12-27 15:13:40,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:40,873 INFO L225 Difference]: With dead ends: 89 [2019-12-27 15:13:40,874 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 15:13:40,874 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1377, Invalid=2913, Unknown=0, NotChecked=0, Total=4290 [2019-12-27 15:13:40,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 15:13:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-27 15:13:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 15:13:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 174 transitions. [2019-12-27 15:13:40,876 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 174 transitions. Word has length 38 [2019-12-27 15:13:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:40,877 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 174 transitions. [2019-12-27 15:13:40,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 15:13:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 174 transitions. [2019-12-27 15:13:40,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 15:13:40,877 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:40,878 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:41,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:41,081 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:41,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1298077438, now seen corresponding path program 61 times [2019-12-27 15:13:41,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:41,082 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826693732] [2019-12-27 15:13:41,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:41,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826693732] [2019-12-27 15:13:41,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90187884] [2019-12-27 15:13:41,590 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:41,659 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 15:13:41,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:41,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:41,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 15:13:41,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1316805510] [2019-12-27 15:13:41,692 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:41,697 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:41,712 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 46 states and 51 transitions. [2019-12-27 15:13:41,713 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:41,714 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:41,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 15:13:41,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 15:13:41,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 15:13:41,715 INFO L87 Difference]: Start difference. First operand 86 states and 174 transitions. Second operand 35 states. [2019-12-27 15:13:42,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:42,605 INFO L93 Difference]: Finished difference Result 90 states and 182 transitions. [2019-12-27 15:13:42,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 15:13:42,605 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2019-12-27 15:13:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:42,606 INFO L225 Difference]: With dead ends: 90 [2019-12-27 15:13:42,606 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 15:13:42,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1397, Invalid=3025, Unknown=0, NotChecked=0, Total=4422 [2019-12-27 15:13:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 15:13:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2019-12-27 15:13:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-27 15:13:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 104 transitions. [2019-12-27 15:13:42,610 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 104 transitions. Word has length 39 [2019-12-27 15:13:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:42,610 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 104 transitions. [2019-12-27 15:13:42,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 15:13:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 104 transitions. [2019-12-27 15:13:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 15:13:42,611 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:42,611 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:42,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:42,812 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash -376015390, now seen corresponding path program 62 times [2019-12-27 15:13:42,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:42,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310401436] [2019-12-27 15:13:42,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:43,199 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:43,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310401436] [2019-12-27 15:13:43,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552971642] [2019-12-27 15:13:43,200 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:43,254 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:13:43,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:43,256 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 15:13:43,257 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:43,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:43,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 15:13:43,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [590658727] [2019-12-27 15:13:43,282 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:43,288 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:43,303 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 44 states and 47 transitions. [2019-12-27 15:13:43,304 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:43,305 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:43,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 15:13:43,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:43,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 15:13:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 15:13:43,306 INFO L87 Difference]: Start difference. First operand 51 states and 104 transitions. Second operand 35 states. [2019-12-27 15:13:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:44,633 INFO L93 Difference]: Finished difference Result 91 states and 184 transitions. [2019-12-27 15:13:44,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 15:13:44,633 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2019-12-27 15:13:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:44,634 INFO L225 Difference]: With dead ends: 91 [2019-12-27 15:13:44,634 INFO L226 Difference]: Without dead ends: 88 [2019-12-27 15:13:44,635 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1461, Invalid=3095, Unknown=0, NotChecked=0, Total=4556 [2019-12-27 15:13:44,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-27 15:13:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-27 15:13:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 15:13:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 178 transitions. [2019-12-27 15:13:44,639 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 178 transitions. Word has length 39 [2019-12-27 15:13:44,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:44,639 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 178 transitions. [2019-12-27 15:13:44,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 15:13:44,640 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 178 transitions. [2019-12-27 15:13:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 15:13:44,640 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:44,640 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:44,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:44,844 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:44,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1585694971, now seen corresponding path program 63 times [2019-12-27 15:13:44,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:44,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888903376] [2019-12-27 15:13:44,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:45,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888903376] [2019-12-27 15:13:45,338 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728779616] [2019-12-27 15:13:45,338 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:45,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-12-27 15:13:45,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:45,423 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 15:13:45,424 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:45,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:45,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 15:13:45,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1604135371] [2019-12-27 15:13:45,457 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:45,463 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:45,480 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 47 states and 52 transitions. [2019-12-27 15:13:45,480 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:45,481 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:45,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 15:13:45,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:45,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 15:13:45,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 15:13:45,483 INFO L87 Difference]: Start difference. First operand 88 states and 178 transitions. Second operand 36 states. [2019-12-27 15:13:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:46,387 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2019-12-27 15:13:46,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 15:13:46,388 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2019-12-27 15:13:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:46,389 INFO L225 Difference]: With dead ends: 92 [2019-12-27 15:13:46,389 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 15:13:46,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1482, Invalid=3210, Unknown=0, NotChecked=0, Total=4692 [2019-12-27 15:13:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 15:13:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 52. [2019-12-27 15:13:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 15:13:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 15:13:46,392 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 40 [2019-12-27 15:13:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:46,392 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 15:13:46,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 15:13:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 15:13:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 15:13:46,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:46,393 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:46,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:46,594 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:46,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1228425103, now seen corresponding path program 64 times [2019-12-27 15:13:46,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:46,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866799640] [2019-12-27 15:13:46,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:47,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866799640] [2019-12-27 15:13:47,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308946915] [2019-12-27 15:13:47,085 INFO L92 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:47,152 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:13:47,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:47,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 15:13:47,166 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:47,194 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:47,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:47,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 15:13:47,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [974928419] [2019-12-27 15:13:47,195 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:47,199 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:47,211 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 45 states and 48 transitions. [2019-12-27 15:13:47,211 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:47,211 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:47,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 15:13:47,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 15:13:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 15:13:47,212 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 36 states. [2019-12-27 15:13:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:48,128 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2019-12-27 15:13:48,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 15:13:48,129 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2019-12-27 15:13:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:48,130 INFO L225 Difference]: With dead ends: 93 [2019-12-27 15:13:48,130 INFO L226 Difference]: Without dead ends: 90 [2019-12-27 15:13:48,131 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1548, Invalid=3282, Unknown=0, NotChecked=0, Total=4830 [2019-12-27 15:13:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-27 15:13:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-27 15:13:48,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-27 15:13:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 182 transitions. [2019-12-27 15:13:48,134 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 182 transitions. Word has length 40 [2019-12-27 15:13:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:48,134 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 182 transitions. [2019-12-27 15:13:48,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 15:13:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 182 transitions. [2019-12-27 15:13:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 15:13:48,134 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:48,134 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:48,335 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:48,335 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:48,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1911904150, now seen corresponding path program 65 times [2019-12-27 15:13:48,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:48,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657110905] [2019-12-27 15:13:48,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:48,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657110905] [2019-12-27 15:13:48,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176951602] [2019-12-27 15:13:48,907 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:48,982 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-27 15:13:48,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:48,984 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 15:13:48,985 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:49,014 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:49,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:49,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 15:13:49,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [191830964] [2019-12-27 15:13:49,015 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:49,024 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:49,072 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 48 states and 53 transitions. [2019-12-27 15:13:49,072 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:49,073 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:49,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 15:13:49,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:49,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 15:13:49,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 15:13:49,074 INFO L87 Difference]: Start difference. First operand 90 states and 182 transitions. Second operand 37 states. [2019-12-27 15:13:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:50,209 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2019-12-27 15:13:50,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 15:13:50,210 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2019-12-27 15:13:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:50,211 INFO L225 Difference]: With dead ends: 94 [2019-12-27 15:13:50,211 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 15:13:50,212 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1569, Invalid=3401, Unknown=0, NotChecked=0, Total=4970 [2019-12-27 15:13:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 15:13:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 53. [2019-12-27 15:13:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 15:13:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-27 15:13:50,214 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 41 [2019-12-27 15:13:50,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:50,214 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-27 15:13:50,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 15:13:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-27 15:13:50,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 15:13:50,215 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:50,216 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:50,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:50,419 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:50,419 INFO L82 PathProgramCache]: Analyzing trace with hash -573527414, now seen corresponding path program 66 times [2019-12-27 15:13:50,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:50,421 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7688566] [2019-12-27 15:13:50,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:50,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7688566] [2019-12-27 15:13:50,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726961834] [2019-12-27 15:13:50,851 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:50,930 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-12-27 15:13:50,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:50,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 15:13:50,933 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:50,959 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:50,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:50,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 15:13:50,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [369484402] [2019-12-27 15:13:50,960 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:50,963 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:51,008 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 46 states and 49 transitions. [2019-12-27 15:13:51,008 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:51,009 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:51,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 15:13:51,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:51,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 15:13:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 15:13:51,009 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 37 states. [2019-12-27 15:13:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:51,974 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2019-12-27 15:13:51,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 15:13:51,975 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2019-12-27 15:13:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:51,976 INFO L225 Difference]: With dead ends: 95 [2019-12-27 15:13:51,976 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 15:13:51,977 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1637, Invalid=3475, Unknown=0, NotChecked=0, Total=5112 [2019-12-27 15:13:51,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 15:13:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-12-27 15:13:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-27 15:13:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 186 transitions. [2019-12-27 15:13:51,980 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 186 transitions. Word has length 41 [2019-12-27 15:13:51,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:51,980 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 186 transitions. [2019-12-27 15:13:51,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 15:13:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 186 transitions. [2019-12-27 15:13:51,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 15:13:51,981 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:51,981 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:52,184 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:52,185 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash -860513437, now seen corresponding path program 67 times [2019-12-27 15:13:52,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:52,185 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739617914] [2019-12-27 15:13:52,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:52,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739617914] [2019-12-27 15:13:52,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463135697] [2019-12-27 15:13:52,668 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:52,734 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-27 15:13:52,735 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:52,771 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:52,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:52,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 15:13:52,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1635264808] [2019-12-27 15:13:52,772 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:52,777 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:52,800 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 49 states and 54 transitions. [2019-12-27 15:13:52,800 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:52,802 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:52,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 15:13:52,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:52,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 15:13:52,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 15:13:52,805 INFO L87 Difference]: Start difference. First operand 92 states and 186 transitions. Second operand 38 states. [2019-12-27 15:13:53,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:53,843 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2019-12-27 15:13:53,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 15:13:53,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2019-12-27 15:13:53,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:53,845 INFO L225 Difference]: With dead ends: 96 [2019-12-27 15:13:53,845 INFO L226 Difference]: Without dead ends: 93 [2019-12-27 15:13:53,845 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1659, Invalid=3597, Unknown=0, NotChecked=0, Total=5256 [2019-12-27 15:13:53,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-27 15:13:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2019-12-27 15:13:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 15:13:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-27 15:13:53,849 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 42 [2019-12-27 15:13:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:53,849 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-27 15:13:53,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 15:13:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-27 15:13:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 15:13:53,850 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:53,850 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:54,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:54,053 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash -599480345, now seen corresponding path program 68 times [2019-12-27 15:13:54,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:54,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786728336] [2019-12-27 15:13:54,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:54,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786728336] [2019-12-27 15:13:54,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899458077] [2019-12-27 15:13:54,492 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:54,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:13:54,552 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:54,553 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 15:13:54,554 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:54,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:54,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 15:13:54,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [36313638] [2019-12-27 15:13:54,591 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:54,593 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:54,607 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 47 states and 50 transitions. [2019-12-27 15:13:54,607 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:54,607 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:54,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 15:13:54,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:54,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 15:13:54,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 15:13:54,608 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 38 states. [2019-12-27 15:13:55,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:55,631 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2019-12-27 15:13:55,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 15:13:55,631 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2019-12-27 15:13:55,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:55,632 INFO L225 Difference]: With dead ends: 97 [2019-12-27 15:13:55,632 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 15:13:55,633 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1729, Invalid=3673, Unknown=0, NotChecked=0, Total=5402 [2019-12-27 15:13:55,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 15:13:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-12-27 15:13:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-27 15:13:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 190 transitions. [2019-12-27 15:13:55,635 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 190 transitions. Word has length 42 [2019-12-27 15:13:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:55,635 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 190 transitions. [2019-12-27 15:13:55,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 15:13:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 190 transitions. [2019-12-27 15:13:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 15:13:55,636 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:55,636 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:55,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:55,839 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:55,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash -906112466, now seen corresponding path program 69 times [2019-12-27 15:13:55,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:55,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953676979] [2019-12-27 15:13:55,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:55,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:56,317 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:56,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953676979] [2019-12-27 15:13:56,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625564734] [2019-12-27 15:13:56,318 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:56,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-27 15:13:56,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:56,396 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 15:13:56,397 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:56,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:56,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 15:13:56,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [152860931] [2019-12-27 15:13:56,424 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:56,427 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:56,441 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 50 states and 55 transitions. [2019-12-27 15:13:56,441 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:56,442 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:13:56,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 15:13:56,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:56,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 15:13:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 15:13:56,443 INFO L87 Difference]: Start difference. First operand 94 states and 190 transitions. Second operand 39 states. [2019-12-27 15:13:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:57,537 INFO L93 Difference]: Finished difference Result 98 states and 198 transitions. [2019-12-27 15:13:57,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 15:13:57,537 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2019-12-27 15:13:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:57,538 INFO L225 Difference]: With dead ends: 98 [2019-12-27 15:13:57,538 INFO L226 Difference]: Without dead ends: 95 [2019-12-27 15:13:57,539 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1751, Invalid=3799, Unknown=0, NotChecked=0, Total=5550 [2019-12-27 15:13:57,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-27 15:13:57,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 55. [2019-12-27 15:13:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 15:13:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 112 transitions. [2019-12-27 15:13:57,541 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 112 transitions. Word has length 43 [2019-12-27 15:13:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:57,542 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 112 transitions. [2019-12-27 15:13:57,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 15:13:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 112 transitions. [2019-12-27 15:13:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 15:13:57,542 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:57,542 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:57,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:57,743 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:57,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1404021454, now seen corresponding path program 70 times [2019-12-27 15:13:57,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:57,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709956006] [2019-12-27 15:13:57,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:13:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:58,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709956006] [2019-12-27 15:13:58,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110802239] [2019-12-27 15:13:58,211 INFO L92 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:58,274 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:13:58,274 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:13:58,275 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 15:13:58,276 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:13:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:13:58,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:13:58,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 15:13:58,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [521764908] [2019-12-27 15:13:58,302 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:13:58,305 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:13:58,319 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 48 states and 51 transitions. [2019-12-27 15:13:58,319 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:13:58,320 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:13:58,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 15:13:58,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:13:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 15:13:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 15:13:58,320 INFO L87 Difference]: Start difference. First operand 55 states and 112 transitions. Second operand 39 states. [2019-12-27 15:13:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:13:59,387 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2019-12-27 15:13:59,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 15:13:59,388 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2019-12-27 15:13:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:13:59,389 INFO L225 Difference]: With dead ends: 99 [2019-12-27 15:13:59,389 INFO L226 Difference]: Without dead ends: 96 [2019-12-27 15:13:59,389 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1823, Invalid=3877, Unknown=0, NotChecked=0, Total=5700 [2019-12-27 15:13:59,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-27 15:13:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-12-27 15:13:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 15:13:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 194 transitions. [2019-12-27 15:13:59,391 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 194 transitions. Word has length 43 [2019-12-27 15:13:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:13:59,392 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 194 transitions. [2019-12-27 15:13:59,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 15:13:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 194 transitions. [2019-12-27 15:13:59,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 15:13:59,392 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:13:59,392 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:13:59,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:13:59,593 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:13:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:13:59,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1975284683, now seen corresponding path program 71 times [2019-12-27 15:13:59,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:13:59,595 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352785230] [2019-12-27 15:13:59,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:13:59,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:00,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352785230] [2019-12-27 15:14:00,088 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559402429] [2019-12-27 15:14:00,088 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:00,160 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-12-27 15:14:00,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:14:00,163 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-27 15:14:00,164 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:00,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:14:00,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 15:14:00,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [766852117] [2019-12-27 15:14:00,191 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:00,194 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:00,210 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 51 states and 56 transitions. [2019-12-27 15:14:00,210 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:00,211 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:14:00,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 15:14:00,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:00,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 15:14:00,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 15:14:00,212 INFO L87 Difference]: Start difference. First operand 96 states and 194 transitions. Second operand 40 states. [2019-12-27 15:14:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:01,319 INFO L93 Difference]: Finished difference Result 100 states and 202 transitions. [2019-12-27 15:14:01,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 15:14:01,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2019-12-27 15:14:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:01,320 INFO L225 Difference]: With dead ends: 100 [2019-12-27 15:14:01,321 INFO L226 Difference]: Without dead ends: 97 [2019-12-27 15:14:01,321 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1846, Invalid=4006, Unknown=0, NotChecked=0, Total=5852 [2019-12-27 15:14:01,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-27 15:14:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 56. [2019-12-27 15:14:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 15:14:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-27 15:14:01,323 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 44 [2019-12-27 15:14:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:01,324 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-27 15:14:01,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 15:14:01,324 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-27 15:14:01,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 15:14:01,325 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:01,325 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:01,528 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:01,528 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:01,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:01,529 INFO L82 PathProgramCache]: Analyzing trace with hash -574991809, now seen corresponding path program 72 times [2019-12-27 15:14:01,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:01,530 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552188773] [2019-12-27 15:14:01,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:02,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552188773] [2019-12-27 15:14:02,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285416674] [2019-12-27 15:14:02,003 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:02,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-27 15:14:02,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:14:02,088 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-27 15:14:02,089 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:02,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:14:02,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 15:14:02,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [276691701] [2019-12-27 15:14:02,127 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:02,131 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:02,153 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 49 states and 52 transitions. [2019-12-27 15:14:02,153 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:02,154 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:14:02,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 15:14:02,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:02,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 15:14:02,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 15:14:02,155 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 40 states. [2019-12-27 15:14:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:03,502 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2019-12-27 15:14:03,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 15:14:03,503 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2019-12-27 15:14:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:03,504 INFO L225 Difference]: With dead ends: 101 [2019-12-27 15:14:03,504 INFO L226 Difference]: Without dead ends: 98 [2019-12-27 15:14:03,505 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1920, Invalid=4086, Unknown=0, NotChecked=0, Total=6006 [2019-12-27 15:14:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-12-27 15:14:03,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-12-27 15:14:03,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 15:14:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2019-12-27 15:14:03,507 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 44 [2019-12-27 15:14:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:03,508 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2019-12-27 15:14:03,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 15:14:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2019-12-27 15:14:03,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 15:14:03,508 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:03,508 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:03,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:03,709 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:03,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:03,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1104283334, now seen corresponding path program 73 times [2019-12-27 15:14:03,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:03,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527823051] [2019-12-27 15:14:03,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:04,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527823051] [2019-12-27 15:14:04,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747281619] [2019-12-27 15:14:04,206 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:04,269 INFO L264 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-27 15:14:04,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:04,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:14:04,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 15:14:04,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [842232084] [2019-12-27 15:14:04,312 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:04,315 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:04,331 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 52 states and 57 transitions. [2019-12-27 15:14:04,331 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:04,332 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:14:04,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 15:14:04,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:04,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 15:14:04,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 15:14:04,333 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand 41 states. [2019-12-27 15:14:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:05,512 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2019-12-27 15:14:05,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 15:14:05,513 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2019-12-27 15:14:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:05,514 INFO L225 Difference]: With dead ends: 102 [2019-12-27 15:14:05,514 INFO L226 Difference]: Without dead ends: 99 [2019-12-27 15:14:05,515 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1943, Invalid=4219, Unknown=0, NotChecked=0, Total=6162 [2019-12-27 15:14:05,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-27 15:14:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 57. [2019-12-27 15:14:05,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-27 15:14:05,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2019-12-27 15:14:05,517 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 45 [2019-12-27 15:14:05,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:05,517 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2019-12-27 15:14:05,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 15:14:05,518 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2019-12-27 15:14:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 15:14:05,518 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:05,518 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:05,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:05,720 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:05,720 INFO L82 PathProgramCache]: Analyzing trace with hash -644876838, now seen corresponding path program 74 times [2019-12-27 15:14:05,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:05,721 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585855039] [2019-12-27 15:14:05,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:05,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:06,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585855039] [2019-12-27 15:14:06,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111633320] [2019-12-27 15:14:06,206 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:06,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:14:06,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:14:06,271 INFO L264 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-27 15:14:06,271 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:06,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:14:06,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 15:14:06,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1357477173] [2019-12-27 15:14:06,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:06,303 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:06,319 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 50 states and 53 transitions. [2019-12-27 15:14:06,319 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:06,320 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:14:06,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 15:14:06,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 15:14:06,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 15:14:06,321 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand 41 states. [2019-12-27 15:14:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:07,478 INFO L93 Difference]: Finished difference Result 103 states and 208 transitions. [2019-12-27 15:14:07,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 15:14:07,478 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2019-12-27 15:14:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:07,479 INFO L225 Difference]: With dead ends: 103 [2019-12-27 15:14:07,480 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 15:14:07,480 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2019, Invalid=4301, Unknown=0, NotChecked=0, Total=6320 [2019-12-27 15:14:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 15:14:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-12-27 15:14:07,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 15:14:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 202 transitions. [2019-12-27 15:14:07,483 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 202 transitions. Word has length 45 [2019-12-27 15:14:07,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:07,484 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 202 transitions. [2019-12-27 15:14:07,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 15:14:07,484 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 202 transitions. [2019-12-27 15:14:07,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 15:14:07,484 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:07,484 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:07,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:07,685 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash -126954957, now seen corresponding path program 75 times [2019-12-27 15:14:07,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:07,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571195431] [2019-12-27 15:14:07,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:08,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571195431] [2019-12-27 15:14:08,244 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672841322] [2019-12-27 15:14:08,244 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:08,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-27 15:14:08,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:14:08,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 15:14:08,332 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:08,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:14:08,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 15:14:08,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224021848] [2019-12-27 15:14:08,377 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:08,382 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:08,404 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 53 states and 58 transitions. [2019-12-27 15:14:08,404 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:08,405 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:14:08,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 15:14:08,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:08,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 15:14:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 15:14:08,406 INFO L87 Difference]: Start difference. First operand 100 states and 202 transitions. Second operand 42 states. [2019-12-27 15:14:09,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:09,633 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2019-12-27 15:14:09,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 15:14:09,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2019-12-27 15:14:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:09,635 INFO L225 Difference]: With dead ends: 104 [2019-12-27 15:14:09,635 INFO L226 Difference]: Without dead ends: 101 [2019-12-27 15:14:09,636 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2043, Invalid=4437, Unknown=0, NotChecked=0, Total=6480 [2019-12-27 15:14:09,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-27 15:14:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2019-12-27 15:14:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 15:14:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-27 15:14:09,638 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 46 [2019-12-27 15:14:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:09,638 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-27 15:14:09,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 15:14:09,639 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-27 15:14:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 15:14:09,639 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:09,639 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:09,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:09,840 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:09,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1483654807, now seen corresponding path program 76 times [2019-12-27 15:14:09,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:09,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594482721] [2019-12-27 15:14:09,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:10,384 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:10,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594482721] [2019-12-27 15:14:10,385 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601854574] [2019-12-27 15:14:10,385 INFO L92 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:10,453 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 15:14:10,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:14:10,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 15:14:10,455 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:10,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:14:10,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 15:14:10,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [404310713] [2019-12-27 15:14:10,488 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:10,491 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:10,510 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 51 states and 54 transitions. [2019-12-27 15:14:10,510 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:10,511 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:14:10,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 15:14:10,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:10,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 15:14:10,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 15:14:10,512 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 42 states. [2019-12-27 15:14:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:11,724 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2019-12-27 15:14:11,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 15:14:11,725 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2019-12-27 15:14:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:11,726 INFO L225 Difference]: With dead ends: 105 [2019-12-27 15:14:11,726 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 15:14:11,727 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2121, Invalid=4521, Unknown=0, NotChecked=0, Total=6642 [2019-12-27 15:14:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 15:14:11,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-12-27 15:14:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 15:14:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 206 transitions. [2019-12-27 15:14:11,729 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 206 transitions. Word has length 46 [2019-12-27 15:14:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:11,730 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 206 transitions. [2019-12-27 15:14:11,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 15:14:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 206 transitions. [2019-12-27 15:14:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 15:14:11,730 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:11,730 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:11,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:11,934 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:11,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:11,935 INFO L82 PathProgramCache]: Analyzing trace with hash 359363934, now seen corresponding path program 77 times [2019-12-27 15:14:11,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:11,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966201279] [2019-12-27 15:14:11,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:12,467 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966201279] [2019-12-27 15:14:12,468 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894980309] [2019-12-27 15:14:12,468 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:12,541 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-27 15:14:12,541 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:14:12,543 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-27 15:14:12,544 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:12,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:14:12,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 15:14:12,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1763998801] [2019-12-27 15:14:12,573 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:12,576 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:12,594 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 54 states and 59 transitions. [2019-12-27 15:14:12,594 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:12,595 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:14:12,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 15:14:12,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:12,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 15:14:12,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 15:14:12,596 INFO L87 Difference]: Start difference. First operand 102 states and 206 transitions. Second operand 43 states. [2019-12-27 15:14:14,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:14,094 INFO L93 Difference]: Finished difference Result 106 states and 214 transitions. [2019-12-27 15:14:14,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 15:14:14,094 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2019-12-27 15:14:14,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:14,095 INFO L225 Difference]: With dead ends: 106 [2019-12-27 15:14:14,096 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 15:14:14,096 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=4661, Unknown=0, NotChecked=0, Total=6806 [2019-12-27 15:14:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 15:14:14,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 59. [2019-12-27 15:14:14,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 15:14:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 120 transitions. [2019-12-27 15:14:14,098 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 120 transitions. Word has length 47 [2019-12-27 15:14:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:14,099 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 120 transitions. [2019-12-27 15:14:14,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 15:14:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 120 transitions. [2019-12-27 15:14:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 15:14:14,099 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:14,099 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:14,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:14,300 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1251341182, now seen corresponding path program 78 times [2019-12-27 15:14:14,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:14,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603635317] [2019-12-27 15:14:14,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:14,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603635317] [2019-12-27 15:14:14,871 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65952547] [2019-12-27 15:14:14,871 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:14,959 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-12-27 15:14:14,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:14:14,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-27 15:14:14,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:14,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 15:14:14,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 15:14:14,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1377600866] [2019-12-27 15:14:14,995 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:14,998 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:15,016 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 52 states and 55 transitions. [2019-12-27 15:14:15,016 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:15,017 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 15:14:15,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 15:14:15,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:15,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 15:14:15,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 15:14:15,018 INFO L87 Difference]: Start difference. First operand 59 states and 120 transitions. Second operand 43 states. [2019-12-27 15:14:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:16,255 INFO L93 Difference]: Finished difference Result 107 states and 216 transitions. [2019-12-27 15:14:16,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 15:14:16,256 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2019-12-27 15:14:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:16,257 INFO L225 Difference]: With dead ends: 107 [2019-12-27 15:14:16,257 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 15:14:16,258 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2225, Invalid=4747, Unknown=0, NotChecked=0, Total=6972 [2019-12-27 15:14:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 15:14:16,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-12-27 15:14:16,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 15:14:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2019-12-27 15:14:16,260 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 47 [2019-12-27 15:14:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:16,260 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2019-12-27 15:14:16,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 15:14:16,260 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2019-12-27 15:14:16,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 15:14:16,260 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:16,261 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:16,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:16,461 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:16,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1744619877, now seen corresponding path program 79 times [2019-12-27 15:14:16,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:16,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220422168] [2019-12-27 15:14:16,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 380 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:16,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220422168] [2019-12-27 15:14:16,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505729324] [2019-12-27 15:14:16,823 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:16,898 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 15:14:16,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:16,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:14:16,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2019-12-27 15:14:16,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323825777] [2019-12-27 15:14:16,922 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:16,927 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:16,952 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 55 states and 60 transitions. [2019-12-27 15:14:16,952 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:16,953 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 15:14:16,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 15:14:16,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:16,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 15:14:16,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:14:16,954 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand 23 states. [2019-12-27 15:14:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:17,009 INFO L93 Difference]: Finished difference Result 921 states and 1757 transitions. [2019-12-27 15:14:17,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 15:14:17,010 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-27 15:14:17,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:17,010 INFO L225 Difference]: With dead ends: 921 [2019-12-27 15:14:17,010 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 15:14:17,011 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-27 15:14:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 15:14:17,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 15:14:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 15:14:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 94 transitions. [2019-12-27 15:14:17,012 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 94 transitions. Word has length 48 [2019-12-27 15:14:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:17,013 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 94 transitions. [2019-12-27 15:14:17,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 15:14:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 94 transitions. [2019-12-27 15:14:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 15:14:17,013 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 15:14:17,013 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 15:14:17,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:17,217 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 15:14:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 15:14:17,217 INFO L82 PathProgramCache]: Analyzing trace with hash -136870673, now seen corresponding path program 80 times [2019-12-27 15:14:17,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 15:14:17,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449404552] [2019-12-27 15:14:17,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 15:14:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 15:14:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:18,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449404552] [2019-12-27 15:14:18,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981410545] [2019-12-27 15:14:18,131 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:18,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 15:14:18,198 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 15:14:18,199 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 15:14:18,213 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 15:14:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 400 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-27 15:14:18,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 15:14:18,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [42] total 65 [2019-12-27 15:14:18,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [981225521] [2019-12-27 15:14:18,825 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 15:14:18,830 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 15:14:18,855 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 53 states and 56 transitions. [2019-12-27 15:14:18,855 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 15:14:18,856 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 15:14:18,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 15:14:18,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 15:14:18,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 15:14:18,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3422, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 15:14:18,857 INFO L87 Difference]: Start difference. First operand 60 states and 94 transitions. Second operand 23 states. [2019-12-27 15:14:18,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 15:14:18,927 INFO L93 Difference]: Finished difference Result 451 states and 644 transitions. [2019-12-27 15:14:18,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 15:14:18,928 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-27 15:14:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 15:14:18,928 INFO L225 Difference]: With dead ends: 451 [2019-12-27 15:14:18,928 INFO L226 Difference]: Without dead ends: 0 [2019-12-27 15:14:18,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=738, Invalid=3422, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 15:14:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-27 15:14:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-27 15:14:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-27 15:14:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-27 15:14:18,930 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2019-12-27 15:14:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 15:14:18,930 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-27 15:14:18,930 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 15:14:18,930 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-27 15:14:18,930 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-27 15:14:19,131 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 15:14:19,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 03:14:19 BasicIcfg [2019-12-27 15:14:19,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 15:14:19,137 INFO L168 Benchmark]: Toolchain (without parser) took 96167.94 ms. Allocated memory was 145.8 MB in the beginning and 613.4 MB in the end (delta: 467.7 MB). Free memory was 102.1 MB in the beginning and 379.2 MB in the end (delta: -277.1 MB). Peak memory consumption was 190.5 MB. Max. memory is 7.1 GB. [2019-12-27 15:14:19,138 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-27 15:14:19,138 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.78 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 101.6 MB in the beginning and 162.8 MB in the end (delta: -61.2 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2019-12-27 15:14:19,138 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.24 ms. Allocated memory is still 203.4 MB. Free memory was 162.8 MB in the beginning and 160.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-12-27 15:14:19,139 INFO L168 Benchmark]: Boogie Preprocessor took 28.70 ms. Allocated memory is still 203.4 MB. Free memory was 160.8 MB in the beginning and 158.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 15:14:19,139 INFO L168 Benchmark]: RCFGBuilder took 430.53 ms. Allocated memory is still 203.4 MB. Free memory was 158.8 MB in the beginning and 139.6 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2019-12-27 15:14:19,139 INFO L168 Benchmark]: TraceAbstraction took 94986.20 ms. Allocated memory was 203.4 MB in the beginning and 613.4 MB in the end (delta: 410.0 MB). Free memory was 139.0 MB in the beginning and 379.2 MB in the end (delta: -240.2 MB). Peak memory consumption was 169.8 MB. Max. memory is 7.1 GB. [2019-12-27 15:14:19,141 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 145.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 661.78 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 101.6 MB in the beginning and 162.8 MB in the end (delta: -61.2 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 55.24 ms. Allocated memory is still 203.4 MB. Free memory was 162.8 MB in the beginning and 160.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.70 ms. Allocated memory is still 203.4 MB. Free memory was 160.8 MB in the beginning and 158.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.53 ms. Allocated memory is still 203.4 MB. Free memory was 158.8 MB in the beginning and 139.6 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 94986.20 ms. Allocated memory was 203.4 MB in the beginning and 613.4 MB in the end (delta: 410.0 MB). Free memory was 139.0 MB in the beginning and 379.2 MB in the end (delta: -240.2 MB). Peak memory consumption was 169.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 94.8s, OverallIterations: 82, TraceHistogramMax: 21, AutomataDifference: 45.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 901 SDtfs, 2663 SDslu, 3391 SDs, 0 SdLazy, 5096 SolverSat, 5578 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5691 GetRequests, 2213 SyntacticMatches, 0 SemanticMatches, 3478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36013 ImplicationChecksByTransitivity, 57.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 82 MinimizatonAttempts, 975 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 24.0s InterpolantComputationTime, 4554 NumberOfCodeBlocks, 4554 NumberOfCodeBlocksAsserted, 579 NumberOfCheckSat, 4394 ConstructedInterpolants, 0 QuantifiedInterpolants, 446468 SizeOfPredicates, 1558 NumberOfNonLiveVariables, 13572 ConjunctsInSsa, 1985 ConjunctsInUnsatCore, 160 InterpolantComputations, 6 PerfectInterpolantSequences, 1180/22120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...