/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-VariableLbe-MCR.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-4336eb1 [2019-12-27 19:21:27,597 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-27 19:21:27,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-27 19:21:27,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-27 19:21:27,612 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-27 19:21:27,613 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-27 19:21:27,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-27 19:21:27,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-27 19:21:27,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-27 19:21:27,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-27 19:21:27,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-27 19:21:27,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-27 19:21:27,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-27 19:21:27,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-27 19:21:27,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-27 19:21:27,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-27 19:21:27,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-27 19:21:27,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-27 19:21:27,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-27 19:21:27,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-27 19:21:27,637 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-27 19:21:27,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-27 19:21:27,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-27 19:21:27,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-27 19:21:27,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-12-27 19:21:27,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-27 19:21:27,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-27 19:21:27,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-27 19:21:27,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-27 19:21:27,654 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-27 19:21:27,654 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-27 19:21:27,655 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-27 19:21:27,655 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-27 19:21:27,655 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-27 19:21:27,656 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-27 19:21:27,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-27 19:21:27,658 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-VariableLbe-MCR.epf [2019-12-27 19:21:27,673 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-27 19:21:27,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-27 19:21:27,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-27 19:21:27,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-27 19:21:27,675 INFO L138 SettingsManager]: * Use SBE=true [2019-12-27 19:21:27,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-27 19:21:27,675 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-27 19:21:27,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-27 19:21:27,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-27 19:21:27,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-27 19:21:27,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-27 19:21:27,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-27 19:21:27,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-27 19:21:27,676 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-27 19:21:27,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-27 19:21:27,677 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-27 19:21:27,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-27 19:21:27,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-27 19:21:27,677 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-27 19:21:27,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-27 19:21:27,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-27 19:21:27,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-27 19:21:27,678 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-27 19:21:27,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-27 19:21:27,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-27 19:21:27,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-27 19:21:27,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-27 19:21:27,679 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2019-12-27 19:21:27,680 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-27 19:21:27,680 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-27 19:21:27,680 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2019-12-27 19:21:27,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-27 19:21:27,968 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-27 19:21:27,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-27 19:21:27,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-27 19:21:27,992 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-27 19:21:27,993 INFO L275 PluginConnector]: CDTParser initialized [2019-12-27 19:21:27,994 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-27 19:21:28,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f634b1843/a59f3a2c7300434b8040d6a7fd6c88c3/FLAGc59d20489 [2019-12-27 19:21:28,619 INFO L306 CDTParser]: Found 1 translation units. [2019-12-27 19:21:28,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2019-12-27 19:21:28,637 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f634b1843/a59f3a2c7300434b8040d6a7fd6c88c3/FLAGc59d20489 [2019-12-27 19:21:28,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f634b1843/a59f3a2c7300434b8040d6a7fd6c88c3 [2019-12-27 19:21:28,916 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-27 19:21:28,917 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-27 19:21:28,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-27 19:21:28,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-27 19:21:28,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-27 19:21:28,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:21:28" (1/1) ... [2019-12-27 19:21:28,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e74f9eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:28, skipping insertion in model container [2019-12-27 19:21:28,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 07:21:28" (1/1) ... [2019-12-27 19:21:28,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-27 19:21:28,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-27 19:21:29,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:21:29,409 INFO L203 MainTranslator]: Completed pre-run [2019-12-27 19:21:29,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-27 19:21:29,530 INFO L208 MainTranslator]: Completed translation [2019-12-27 19:21:29,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29 WrapperNode [2019-12-27 19:21:29,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-27 19:21:29,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-27 19:21:29,532 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-27 19:21:29,532 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-27 19:21:29,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,557 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,579 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-27 19:21:29,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-27 19:21:29,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-27 19:21:29,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-27 19:21:29,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (1/1) ... [2019-12-27 19:21:29,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-27 19:21:29,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-27 19:21:29,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-27 19:21:29,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-27 19:21:29,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (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 19:21:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-12-27 19:21:29,677 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-12-27 19:21:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-12-27 19:21:29,677 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-12-27 19:21:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-27 19:21:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-12-27 19:21:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-27 19:21:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-27 19:21:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-12-27 19:21:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-27 19:21:29,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-27 19:21:29,681 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 19:21:30,077 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-27 19:21:30,077 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-12-27 19:21:30,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:21:30 BoogieIcfgContainer [2019-12-27 19:21:30,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-27 19:21:30,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-27 19:21:30,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-27 19:21:30,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-27 19:21:30,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 07:21:28" (1/3) ... [2019-12-27 19:21:30,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b4a5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:21:30, skipping insertion in model container [2019-12-27 19:21:30,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 07:21:29" (2/3) ... [2019-12-27 19:21:30,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45b4a5d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 07:21:30, skipping insertion in model container [2019-12-27 19:21:30,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 07:21:30" (3/3) ... [2019-12-27 19:21:30,087 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2019-12-27 19:21:30,100 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-27 19:21:30,100 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-27 19:21:30,105 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-27 19:21:30,106 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-27 19:21:30,130 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,131 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,131 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,131 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,132 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,132 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,132 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,133 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,133 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,133 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,133 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,134 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,134 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,134 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,135 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,135 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,135 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,135 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,136 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,136 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,136 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,137 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,137 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,137 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,138 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,138 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,138 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,138 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,142 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,143 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,143 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,143 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,143 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,144 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,150 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,150 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,150 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,150 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,151 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,151 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-27 19:21:30,166 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-12-27 19:21:30,186 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-27 19:21:30,186 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-27 19:21:30,186 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-27 19:21:30,186 INFO L376 AbstractCegarLoop]: Backedges is MCR [2019-12-27 19:21:30,186 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-27 19:21:30,187 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-27 19:21:30,187 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-27 19:21:30,187 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-27 19:21:30,200 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-12-27 19:21:30,202 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 19:21:30,243 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 19:21:30,246 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 19:21:30,251 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 19:21:30,254 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-12-27 19:21:30,271 INFO L132 PetriNetUnfolder]: 5/49 cut-off events. [2019-12-27 19:21:30,271 INFO L133 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-27 19:21:30,273 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 19:21:30,275 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-12-27 19:21:30,276 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-27 19:21:31,531 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-12-27 19:21:31,646 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-12-27 19:21:31,647 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-12-27 19:21:31,650 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-12-27 19:21:31,660 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-27 19:21:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-27 19:21:31,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-27 19:21:31,669 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:31,670 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-27 19:21:31,670 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:31,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:31,678 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-12-27 19:21:31,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:31,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662332754] [2019-12-27 19:21:31,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:31,903 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 19:21:31,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662332754] [2019-12-27 19:21:31,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:21:31,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-27 19:21:31,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1346746492] [2019-12-27 19:21:31,908 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:31,914 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:31,930 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 6 states and 5 transitions. [2019-12-27 19:21:31,931 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:31,936 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 0 times. [2019-12-27 19:21:31,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-27 19:21:31,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:31,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-27 19:21:31,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-27 19:21:31,956 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-27 19:21:31,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:31,985 INFO L93 Difference]: Finished difference Result 48 states and 115 transitions. [2019-12-27 19:21:31,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 19:21:31,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-12-27 19:21:31,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:31,999 INFO L225 Difference]: With dead ends: 48 [2019-12-27 19:21:31,999 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 19:21:32,001 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 19:21:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 19:21:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 19:21:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 19:21:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2019-12-27 19:21:32,043 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 5 [2019-12-27 19:21:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:32,044 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2019-12-27 19:21:32,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-27 19:21:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2019-12-27 19:21:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-27 19:21:32,045 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:32,045 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:32,046 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:32,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:32,046 INFO L82 PathProgramCache]: Analyzing trace with hash 232906128, now seen corresponding path program 1 times [2019-12-27 19:21:32,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:32,047 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410466564] [2019-12-27 19:21:32,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:32,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:32,139 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 19:21:32,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410466564] [2019-12-27 19:21:32,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:21:32,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-27 19:21:32,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [59637474] [2019-12-27 19:21:32,141 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:32,142 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:32,149 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 12 states and 15 transitions. [2019-12-27 19:21:32,149 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:32,156 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:32,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-27 19:21:32,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:32,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-27 19:21:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-12-27 19:21:32,158 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand 4 states. [2019-12-27 19:21:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:32,184 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 19:21:32,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-27 19:21:32,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-12-27 19:21:32,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:32,186 INFO L225 Difference]: With dead ends: 34 [2019-12-27 19:21:32,186 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 19:21:32,201 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 19:21:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 19:21:32,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 19:21:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 19:21:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 19:21:32,208 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 7 [2019-12-27 19:21:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:32,209 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 19:21:32,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-27 19:21:32,209 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 19:21:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:21:32,210 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:32,210 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:32,210 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-12-27 19:21:32,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:32,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563592792] [2019-12-27 19:21:32,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:32,281 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 19:21:32,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563592792] [2019-12-27 19:21:32,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:21:32,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:21:32,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [917967414] [2019-12-27 19:21:32,283 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:32,284 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:32,287 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 21 transitions. [2019-12-27 19:21:32,287 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:32,289 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:32,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:21:32,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:32,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:21:32,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:21:32,291 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 5 states. [2019-12-27 19:21:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:32,324 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 19:21:32,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-27 19:21:32,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:21:32,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:32,326 INFO L225 Difference]: With dead ends: 34 [2019-12-27 19:21:32,326 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 19:21:32,327 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 19:21:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 19:21:32,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2019-12-27 19:21:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 19:21:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 19:21:32,331 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-12-27 19:21:32,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:32,332 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 19:21:32,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:21:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 19:21:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-27 19:21:32,333 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:32,333 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:32,333 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:32,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:32,333 INFO L82 PathProgramCache]: Analyzing trace with hash 483962890, now seen corresponding path program 2 times [2019-12-27 19:21:32,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:32,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508474150] [2019-12-27 19:21:32,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:32,415 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 19:21:32,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508474150] [2019-12-27 19:21:32,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-27 19:21:32,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-27 19:21:32,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1630833427] [2019-12-27 19:21:32,416 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:32,417 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:32,419 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 14 states and 17 transitions. [2019-12-27 19:21:32,419 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:32,421 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:32,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-27 19:21:32,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:32,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-27 19:21:32,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-27 19:21:32,422 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 5 states. [2019-12-27 19:21:32,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:32,460 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 19:21:32,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:21:32,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-12-27 19:21:32,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:32,462 INFO L225 Difference]: With dead ends: 32 [2019-12-27 19:21:32,462 INFO L226 Difference]: Without dead ends: 28 [2019-12-27 19:21:32,462 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 19:21:32,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-12-27 19:21:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-12-27 19:21:32,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 19:21:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 19:21:32,467 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 9 [2019-12-27 19:21:32,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:32,468 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 19:21:32,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-27 19:21:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 19:21:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:21:32,469 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:32,469 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:32,469 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:32,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2133804259, now seen corresponding path program 3 times [2019-12-27 19:21:32,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:32,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847240540] [2019-12-27 19:21:32,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:32,556 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 19:21:32,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847240540] [2019-12-27 19:21:32,557 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951790430] [2019-12-27 19:21:32,557 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 19:21:32,641 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-27 19:21:32,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:32,644 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:21:32,649 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:32,680 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 19:21:32,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:32,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 19:21:32,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [130962694] [2019-12-27 19:21:32,681 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:32,682 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:32,685 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 22 transitions. [2019-12-27 19:21:32,685 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:32,687 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:32,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:21:32,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:32,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:21:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:21:32,688 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 6 states. [2019-12-27 19:21:32,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:32,752 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2019-12-27 19:21:32,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-27 19:21:32,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:21:32,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:32,753 INFO L225 Difference]: With dead ends: 32 [2019-12-27 19:21:32,754 INFO L226 Difference]: Without dead ends: 29 [2019-12-27 19:21:32,754 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 19:21:32,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-12-27 19:21:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-12-27 19:21:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-27 19:21:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-12-27 19:21:32,762 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 10 [2019-12-27 19:21:32,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:32,762 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-12-27 19:21:32,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:21:32,762 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-12-27 19:21:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-27 19:21:32,763 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:32,763 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:32,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:32,971 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:32,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:32,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 4 times [2019-12-27 19:21:32,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:32,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966301641] [2019-12-27 19:21:32,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:33,065 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 19:21:33,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966301641] [2019-12-27 19:21:33,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825317851] [2019-12-27 19:21:33,066 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 19:21:33,133 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:33,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:33,134 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-27 19:21:33,135 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:33,149 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 19:21:33,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:33,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-27 19:21:33,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1563392576] [2019-12-27 19:21:33,150 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:33,151 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:33,153 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 15 states and 18 transitions. [2019-12-27 19:21:33,154 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:33,159 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:33,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-27 19:21:33,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-27 19:21:33,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-27 19:21:33,160 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 6 states. [2019-12-27 19:21:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:33,236 INFO L93 Difference]: Finished difference Result 33 states and 68 transitions. [2019-12-27 19:21:33,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:21:33,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-12-27 19:21:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:33,238 INFO L225 Difference]: With dead ends: 33 [2019-12-27 19:21:33,238 INFO L226 Difference]: Without dead ends: 30 [2019-12-27 19:21:33,238 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:21:33,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-12-27 19:21:33,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-12-27 19:21:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 19:21:33,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 19:21:33,242 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 10 [2019-12-27 19:21:33,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:33,243 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 19:21:33,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-27 19:21:33,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 19:21:33,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:21:33,244 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:33,244 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:33,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:33,447 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:33,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 5 times [2019-12-27 19:21:33,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:33,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644620722] [2019-12-27 19:21:33,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:33,537 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 19:21:33,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644620722] [2019-12-27 19:21:33,538 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110981119] [2019-12-27 19:21:33,538 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 19:21:33,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:33,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:33,604 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-27 19:21:33,606 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:33,627 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 19:21:33,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:33,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 19:21:33,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [208276413] [2019-12-27 19:21:33,628 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:33,631 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:33,633 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 23 transitions. [2019-12-27 19:21:33,633 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:33,635 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:33,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:21:33,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:33,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:21:33,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:21:33,636 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 7 states. [2019-12-27 19:21:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:33,737 INFO L93 Difference]: Finished difference Result 34 states and 70 transitions. [2019-12-27 19:21:33,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-27 19:21:33,737 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:21:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:33,738 INFO L225 Difference]: With dead ends: 34 [2019-12-27 19:21:33,738 INFO L226 Difference]: Without dead ends: 31 [2019-12-27 19:21:33,739 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:21:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-12-27 19:21:33,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2019-12-27 19:21:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-27 19:21:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 48 transitions. [2019-12-27 19:21:33,743 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 48 transitions. Word has length 11 [2019-12-27 19:21:33,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:33,743 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 48 transitions. [2019-12-27 19:21:33,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:21:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 48 transitions. [2019-12-27 19:21:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-27 19:21:33,744 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:33,744 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:33,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:33,946 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:33,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:33,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1231878834, now seen corresponding path program 6 times [2019-12-27 19:21:33,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:33,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273638142] [2019-12-27 19:21:33,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:33,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:34,024 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 19:21:34,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273638142] [2019-12-27 19:21:34,025 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745544372] [2019-12-27 19:21:34,025 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 19:21:34,086 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2019-12-27 19:21:34,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:34,087 INFO L264 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:21:34,096 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:34,114 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 19:21:34,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:34,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-12-27 19:21:34,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [427945220] [2019-12-27 19:21:34,115 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:34,116 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:34,118 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 16 states and 19 transitions. [2019-12-27 19:21:34,118 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:34,122 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:34,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-27 19:21:34,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-27 19:21:34,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-12-27 19:21:34,123 INFO L87 Difference]: Start difference. First operand 23 states and 48 transitions. Second operand 7 states. [2019-12-27 19:21:34,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:34,207 INFO L93 Difference]: Finished difference Result 35 states and 72 transitions. [2019-12-27 19:21:34,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:21:34,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-12-27 19:21:34,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:34,209 INFO L225 Difference]: With dead ends: 35 [2019-12-27 19:21:34,209 INFO L226 Difference]: Without dead ends: 32 [2019-12-27 19:21:34,210 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 19:21:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-12-27 19:21:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-12-27 19:21:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 19:21:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 19:21:34,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 11 [2019-12-27 19:21:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:34,216 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 19:21:34,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-27 19:21:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 19:21:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:21:34,217 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:34,217 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:34,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:34,423 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:34,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:34,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1886502219, now seen corresponding path program 7 times [2019-12-27 19:21:34,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:34,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773360319] [2019-12-27 19:21:34,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:34,498 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 19:21:34,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773360319] [2019-12-27 19:21:34,499 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506209489] [2019-12-27 19:21:34,499 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 19:21:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:34,550 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:21:34,551 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:34,585 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 19:21:34,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:34,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 19:21:34,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [331160665] [2019-12-27 19:21:34,587 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:34,588 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:34,591 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 24 transitions. [2019-12-27 19:21:34,591 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:34,592 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:34,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:21:34,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:21:34,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:21:34,593 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 8 states. [2019-12-27 19:21:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:34,678 INFO L93 Difference]: Finished difference Result 36 states and 74 transitions. [2019-12-27 19:21:34,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-27 19:21:34,678 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:21:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:34,679 INFO L225 Difference]: With dead ends: 36 [2019-12-27 19:21:34,679 INFO L226 Difference]: Without dead ends: 33 [2019-12-27 19:21:34,680 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:21:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-27 19:21:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-12-27 19:21:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-27 19:21:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 50 transitions. [2019-12-27 19:21:34,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 50 transitions. Word has length 12 [2019-12-27 19:21:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:34,690 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 50 transitions. [2019-12-27 19:21:34,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:21:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 50 transitions. [2019-12-27 19:21:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-27 19:21:34,691 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:34,691 INFO L411 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:34,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:34,892 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:34,893 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 8 times [2019-12-27 19:21:34,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:34,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910647035] [2019-12-27 19:21:34,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:34,963 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 19:21:34,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910647035] [2019-12-27 19:21:34,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437313660] [2019-12-27 19:21:34,964 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 19:21:35,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:35,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:35,019 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-27 19:21:35,020 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:35,035 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 19:21:35,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:35,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-27 19:21:35,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1105079498] [2019-12-27 19:21:35,036 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:35,041 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:35,044 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 17 states and 20 transitions. [2019-12-27 19:21:35,044 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:35,045 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:35,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-27 19:21:35,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:35,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-27 19:21:35,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-12-27 19:21:35,046 INFO L87 Difference]: Start difference. First operand 24 states and 50 transitions. Second operand 8 states. [2019-12-27 19:21:35,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:35,141 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-12-27 19:21:35,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:21:35,141 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-12-27 19:21:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:35,142 INFO L225 Difference]: With dead ends: 37 [2019-12-27 19:21:35,142 INFO L226 Difference]: Without dead ends: 34 [2019-12-27 19:21:35,143 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 19:21:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-12-27 19:21:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-12-27 19:21:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 19:21:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 19:21:35,152 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2019-12-27 19:21:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:35,152 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 19:21:35,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-27 19:21:35,152 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 19:21:35,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:21:35,153 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:35,153 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:35,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:35,354 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:35,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:35,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 9 times [2019-12-27 19:21:35,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:35,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156539275] [2019-12-27 19:21:35,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:35,435 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 19:21:35,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156539275] [2019-12-27 19:21:35,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79464128] [2019-12-27 19:21:35,436 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 19:21:35,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-12-27 19:21:35,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:35,519 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:21:35,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:35,539 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 19:21:35,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:35,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 19:21:35,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1012476443] [2019-12-27 19:21:35,540 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:35,544 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:35,547 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 25 transitions. [2019-12-27 19:21:35,548 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:35,549 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:35,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:21:35,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:21:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:21:35,552 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 9 states. [2019-12-27 19:21:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:35,664 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-12-27 19:21:35,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-27 19:21:35,665 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:21:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:35,665 INFO L225 Difference]: With dead ends: 38 [2019-12-27 19:21:35,666 INFO L226 Difference]: Without dead ends: 35 [2019-12-27 19:21:35,666 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 19:21:35,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-27 19:21:35,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2019-12-27 19:21:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-12-27 19:21:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-12-27 19:21:35,669 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 13 [2019-12-27 19:21:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:35,670 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-12-27 19:21:35,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:21:35,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-12-27 19:21:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-27 19:21:35,671 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:35,671 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:35,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:35,876 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1575404710, now seen corresponding path program 10 times [2019-12-27 19:21:35,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:35,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673874229] [2019-12-27 19:21:35,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:35,968 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 19:21:35,968 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673874229] [2019-12-27 19:21:35,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99178548] [2019-12-27 19:21:35,969 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 19:21:36,036 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:36,037 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:36,037 INFO L264 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-27 19:21:36,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:36,061 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 19:21:36,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:36,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-27 19:21:36,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [544144933] [2019-12-27 19:21:36,063 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:36,065 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:36,067 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 18 states and 21 transitions. [2019-12-27 19:21:36,067 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:36,069 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:36,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-27 19:21:36,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:36,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-27 19:21:36,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-12-27 19:21:36,071 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 9 states. [2019-12-27 19:21:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:36,183 INFO L93 Difference]: Finished difference Result 39 states and 80 transitions. [2019-12-27 19:21:36,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:21:36,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-12-27 19:21:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:36,185 INFO L225 Difference]: With dead ends: 39 [2019-12-27 19:21:36,185 INFO L226 Difference]: Without dead ends: 36 [2019-12-27 19:21:36,185 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 19:21:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-12-27 19:21:36,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-12-27 19:21:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 19:21:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 19:21:36,193 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 13 [2019-12-27 19:21:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:36,193 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 19:21:36,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-27 19:21:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 19:21:36,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:36,194 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:36,194 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:36,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:36,399 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:36,400 INFO L82 PathProgramCache]: Analyzing trace with hash 452443059, now seen corresponding path program 11 times [2019-12-27 19:21:36,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:36,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629270351] [2019-12-27 19:21:36,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:36,484 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 19:21:36,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629270351] [2019-12-27 19:21:36,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122399192] [2019-12-27 19:21:36,485 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 19:21:36,532 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-12-27 19:21:36,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:36,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:21:36,534 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:36,551 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 19:21:36,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:36,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 19:21:36,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1028836142] [2019-12-27 19:21:36,553 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:36,554 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:36,556 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 26 transitions. [2019-12-27 19:21:36,556 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:36,558 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:36,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:36,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:36,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:36,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:21:36,559 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 10 states. [2019-12-27 19:21:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:36,704 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-12-27 19:21:36,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-27 19:21:36,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:36,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:36,706 INFO L225 Difference]: With dead ends: 40 [2019-12-27 19:21:36,706 INFO L226 Difference]: Without dead ends: 37 [2019-12-27 19:21:36,706 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 19:21:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-27 19:21:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2019-12-27 19:21:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-27 19:21:36,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-12-27 19:21:36,715 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 14 [2019-12-27 19:21:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:36,716 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-12-27 19:21:36,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-12-27 19:21:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-27 19:21:36,717 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:36,717 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:36,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:36,920 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 12 times [2019-12-27 19:21:36,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:36,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474555225] [2019-12-27 19:21:36,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:36,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:36,999 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 19:21:36,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474555225] [2019-12-27 19:21:36,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005929350] [2019-12-27 19:21:36,999 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 19:21:37,056 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-12-27 19:21:37,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:37,057 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-27 19:21:37,059 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:37,080 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 19:21:37,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:37,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-12-27 19:21:37,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1994477115] [2019-12-27 19:21:37,081 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:37,083 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:37,086 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 19 states and 22 transitions. [2019-12-27 19:21:37,086 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:37,087 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:37,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-27 19:21:37,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:37,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-27 19:21:37,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-12-27 19:21:37,088 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 10 states. [2019-12-27 19:21:37,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:37,270 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-12-27 19:21:37,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:37,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-12-27 19:21:37,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:37,270 INFO L225 Difference]: With dead ends: 41 [2019-12-27 19:21:37,271 INFO L226 Difference]: Without dead ends: 38 [2019-12-27 19:21:37,271 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 19:21:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-12-27 19:21:37,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-12-27 19:21:37,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 19:21:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 19:21:37,274 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 14 [2019-12-27 19:21:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:37,275 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 19:21:37,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-27 19:21:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 19:21:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:21:37,276 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:37,276 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:37,485 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:37,485 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1140833246, now seen corresponding path program 13 times [2019-12-27 19:21:37,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:37,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850094433] [2019-12-27 19:21:37,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:37,568 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 19:21:37,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850094433] [2019-12-27 19:21:37,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675471030] [2019-12-27 19:21:37,569 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 19:21:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:37,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:37,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:37,677 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 19:21:37,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:37,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 19:21:37,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [137255074] [2019-12-27 19:21:37,678 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:37,680 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:37,682 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 27 transitions. [2019-12-27 19:21:37,682 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:37,685 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:37,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:21:37,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:21:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:21:37,687 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 11 states. [2019-12-27 19:21:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:37,828 INFO L93 Difference]: Finished difference Result 42 states and 86 transitions. [2019-12-27 19:21:37,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-27 19:21:37,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-27 19:21:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:37,830 INFO L225 Difference]: With dead ends: 42 [2019-12-27 19:21:37,830 INFO L226 Difference]: Without dead ends: 39 [2019-12-27 19:21:37,831 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:21:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-12-27 19:21:37,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2019-12-27 19:21:37,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-12-27 19:21:37,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-12-27 19:21:37,835 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 15 [2019-12-27 19:21:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:37,835 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-12-27 19:21:37,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:21:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-12-27 19:21:37,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-27 19:21:37,836 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:37,836 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:38,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:38,040 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:38,041 INFO L82 PathProgramCache]: Analyzing trace with hash -2135428606, now seen corresponding path program 14 times [2019-12-27 19:21:38,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:38,042 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860119036] [2019-12-27 19:21:38,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:38,114 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 19:21:38,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860119036] [2019-12-27 19:21:38,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127001475] [2019-12-27 19:21:38,114 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 19:21:38,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:38,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:38,158 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-27 19:21:38,159 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:38,179 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 19:21:38,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:38,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-27 19:21:38,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [722792084] [2019-12-27 19:21:38,180 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:38,181 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:38,183 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 20 states and 23 transitions. [2019-12-27 19:21:38,183 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:38,184 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:38,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-27 19:21:38,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:38,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-27 19:21:38,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-12-27 19:21:38,185 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 11 states. [2019-12-27 19:21:38,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:38,346 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-12-27 19:21:38,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:21:38,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-12-27 19:21:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:38,347 INFO L225 Difference]: With dead ends: 43 [2019-12-27 19:21:38,347 INFO L226 Difference]: Without dead ends: 40 [2019-12-27 19:21:38,348 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:21:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-27 19:21:38,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-27 19:21:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 19:21:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-27 19:21:38,351 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 15 [2019-12-27 19:21:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:38,351 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-27 19:21:38,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-27 19:21:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-27 19:21:38,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:21:38,352 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:38,352 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:38,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:38,559 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 15 times [2019-12-27 19:21:38,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:38,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512791918] [2019-12-27 19:21:38,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:38,654 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 19:21:38,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512791918] [2019-12-27 19:21:38,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644607466] [2019-12-27 19:21:38,654 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 19:21:38,709 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-27 19:21:38,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:38,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:21:38,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:38,744 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 19:21:38,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:38,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 19:21:38,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [125768112] [2019-12-27 19:21:38,745 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:38,746 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:38,749 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 28 transitions. [2019-12-27 19:21:38,749 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:38,750 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:38,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:21:38,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:38,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:21:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:21:38,751 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 12 states. [2019-12-27 19:21:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:38,931 INFO L93 Difference]: Finished difference Result 44 states and 90 transitions. [2019-12-27 19:21:38,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-27 19:21:38,932 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-27 19:21:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:38,933 INFO L225 Difference]: With dead ends: 44 [2019-12-27 19:21:38,933 INFO L226 Difference]: Without dead ends: 41 [2019-12-27 19:21:38,934 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 19:21:38,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-12-27 19:21:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2019-12-27 19:21:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-12-27 19:21:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-12-27 19:21:38,936 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-12-27 19:21:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:38,937 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-12-27 19:21:38,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:21:38,937 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-12-27 19:21:38,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-27 19:21:38,937 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:38,938 INFO L411 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:39,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:39,141 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 16 times [2019-12-27 19:21:39,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:39,142 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013502328] [2019-12-27 19:21:39,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:39,231 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 19:21:39,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013502328] [2019-12-27 19:21:39,232 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20451406] [2019-12-27 19:21:39,232 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 19:21:39,281 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:39,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:39,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-27 19:21:39,283 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:39,318 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 19:21:39,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:39,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-27 19:21:39,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1832622543] [2019-12-27 19:21:39,319 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:39,320 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:39,322 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 21 states and 24 transitions. [2019-12-27 19:21:39,322 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:39,323 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:39,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-27 19:21:39,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:39,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-27 19:21:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-12-27 19:21:39,324 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 12 states. [2019-12-27 19:21:39,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:39,511 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-12-27 19:21:39,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:21:39,512 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-12-27 19:21:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:39,512 INFO L225 Difference]: With dead ends: 45 [2019-12-27 19:21:39,512 INFO L226 Difference]: Without dead ends: 42 [2019-12-27 19:21:39,513 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 19:21:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-27 19:21:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-12-27 19:21:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 19:21:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-27 19:21:39,516 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 16 [2019-12-27 19:21:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:39,517 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-27 19:21:39,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-27 19:21:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-27 19:21:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:21:39,517 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:39,518 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:39,724 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:39,724 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 17 times [2019-12-27 19:21:39,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:39,725 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945089562] [2019-12-27 19:21:39,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:39,834 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 19:21:39,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945089562] [2019-12-27 19:21:39,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926311859] [2019-12-27 19:21:39,835 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 19:21:39,891 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-27 19:21:39,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:39,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-27 19:21:39,894 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:39,918 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 19:21:39,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:39,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 19:21:39,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1183846936] [2019-12-27 19:21:39,919 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:39,920 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:39,923 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 29 transitions. [2019-12-27 19:21:39,923 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:39,924 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:39,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:21:39,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:39,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:21:39,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:21:39,925 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 13 states. [2019-12-27 19:21:40,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:40,130 INFO L93 Difference]: Finished difference Result 46 states and 94 transitions. [2019-12-27 19:21:40,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-27 19:21:40,131 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-27 19:21:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:40,131 INFO L225 Difference]: With dead ends: 46 [2019-12-27 19:21:40,131 INFO L226 Difference]: Without dead ends: 43 [2019-12-27 19:21:40,132 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 19:21:40,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-12-27 19:21:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2019-12-27 19:21:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-12-27 19:21:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 60 transitions. [2019-12-27 19:21:40,136 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 60 transitions. Word has length 17 [2019-12-27 19:21:40,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:40,136 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 60 transitions. [2019-12-27 19:21:40,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:21:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 60 transitions. [2019-12-27 19:21:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-27 19:21:40,138 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:40,138 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:40,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:40,342 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:40,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash 847486634, now seen corresponding path program 18 times [2019-12-27 19:21:40,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:40,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207533315] [2019-12-27 19:21:40,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:40,451 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 19:21:40,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207533315] [2019-12-27 19:21:40,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540644376] [2019-12-27 19:21:40,453 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 19:21:40,505 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-27 19:21:40,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:40,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 19:21:40,510 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:40,535 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 19:21:40,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:40,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-27 19:21:40,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [806376854] [2019-12-27 19:21:40,536 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:40,538 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:40,542 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 22 states and 25 transitions. [2019-12-27 19:21:40,542 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:40,544 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:40,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-27 19:21:40,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:40,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-27 19:21:40,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-12-27 19:21:40,545 INFO L87 Difference]: Start difference. First operand 29 states and 60 transitions. Second operand 13 states. [2019-12-27 19:21:40,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:40,764 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-12-27 19:21:40,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:21:40,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-12-27 19:21:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:40,765 INFO L225 Difference]: With dead ends: 47 [2019-12-27 19:21:40,765 INFO L226 Difference]: Without dead ends: 44 [2019-12-27 19:21:40,765 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 19:21:40,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-12-27 19:21:40,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-12-27 19:21:40,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-27 19:21:40,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-27 19:21:40,769 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-12-27 19:21:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:40,769 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-27 19:21:40,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-27 19:21:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-27 19:21:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:21:40,770 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:40,770 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:40,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:40,976 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 19 times [2019-12-27 19:21:40,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:40,978 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371757415] [2019-12-27 19:21:40,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:41,077 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 19:21:41,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371757415] [2019-12-27 19:21:41,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926345609] [2019-12-27 19:21:41,078 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 19:21:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:41,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 19:21:41,126 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:41,145 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 19:21:41,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:41,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 19:21:41,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [36277659] [2019-12-27 19:21:41,146 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:41,148 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:41,151 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 30 transitions. [2019-12-27 19:21:41,151 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:41,152 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:41,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:21:41,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:41,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:21:41,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:21:41,153 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 14 states. [2019-12-27 19:21:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:41,352 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-12-27 19:21:41,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-27 19:21:41,353 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-12-27 19:21:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:41,354 INFO L225 Difference]: With dead ends: 48 [2019-12-27 19:21:41,354 INFO L226 Difference]: Without dead ends: 45 [2019-12-27 19:21:41,355 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 19:21:41,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-12-27 19:21:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2019-12-27 19:21:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-12-27 19:21:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 62 transitions. [2019-12-27 19:21:41,358 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 62 transitions. Word has length 18 [2019-12-27 19:21:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:41,359 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 62 transitions. [2019-12-27 19:21:41,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:21:41,359 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 62 transitions. [2019-12-27 19:21:41,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-12-27 19:21:41,360 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:41,360 INFO L411 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:41,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:41,563 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:41,564 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 20 times [2019-12-27 19:21:41,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:41,565 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913794423] [2019-12-27 19:21:41,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:41,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:41,690 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 19:21:41,690 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913794423] [2019-12-27 19:21:41,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364377778] [2019-12-27 19:21:41,691 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 19:21:41,742 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:41,742 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:41,743 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-27 19:21:41,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:41,768 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 19:21:41,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:41,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-27 19:21:41,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1077120806] [2019-12-27 19:21:41,769 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:41,770 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:41,773 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 23 states and 26 transitions. [2019-12-27 19:21:41,773 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:41,774 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:41,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-27 19:21:41,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:41,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-27 19:21:41,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2019-12-27 19:21:41,775 INFO L87 Difference]: Start difference. First operand 30 states and 62 transitions. Second operand 14 states. [2019-12-27 19:21:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:41,993 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-12-27 19:21:41,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 19:21:41,993 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2019-12-27 19:21:41,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:41,994 INFO L225 Difference]: With dead ends: 49 [2019-12-27 19:21:41,994 INFO L226 Difference]: Without dead ends: 46 [2019-12-27 19:21:41,995 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 19:21:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-12-27 19:21:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-12-27 19:21:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-27 19:21:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-27 19:21:41,999 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 18 [2019-12-27 19:21:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:41,999 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-27 19:21:41,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-27 19:21:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-27 19:21:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:21:42,000 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:42,000 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:42,204 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:42,204 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:42,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:42,205 INFO L82 PathProgramCache]: Analyzing trace with hash -2080307442, now seen corresponding path program 21 times [2019-12-27 19:21:42,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:42,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002583470] [2019-12-27 19:21:42,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:42,331 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 19:21:42,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002583470] [2019-12-27 19:21:42,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006145430] [2019-12-27 19:21:42,331 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 19:21:42,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-27 19:21:42,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:42,444 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 19:21:42,452 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:42,492 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 19:21:42,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:42,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 19:21:42,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1613408000] [2019-12-27 19:21:42,496 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:42,500 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:42,505 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 31 transitions. [2019-12-27 19:21:42,505 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:42,508 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:42,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:21:42,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:21:42,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:21:42,513 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 15 states. [2019-12-27 19:21:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:42,763 INFO L93 Difference]: Finished difference Result 50 states and 102 transitions. [2019-12-27 19:21:42,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-27 19:21:42,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2019-12-27 19:21:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:42,764 INFO L225 Difference]: With dead ends: 50 [2019-12-27 19:21:42,764 INFO L226 Difference]: Without dead ends: 47 [2019-12-27 19:21:42,764 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:21:42,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-12-27 19:21:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 31. [2019-12-27 19:21:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-12-27 19:21:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-12-27 19:21:42,767 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 19 [2019-12-27 19:21:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:42,767 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-12-27 19:21:42,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:21:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-12-27 19:21:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-27 19:21:42,769 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:42,769 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:42,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:42,970 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121454, now seen corresponding path program 22 times [2019-12-27 19:21:42,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:42,972 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732844631] [2019-12-27 19:21:42,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:43,097 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 19:21:43,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732844631] [2019-12-27 19:21:43,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530821241] [2019-12-27 19:21:43,098 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 19:21:43,164 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:43,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:43,165 INFO L264 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-27 19:21:43,167 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:43,187 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 19:21:43,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:43,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-27 19:21:43,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [180162882] [2019-12-27 19:21:43,188 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:43,190 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:43,194 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 24 states and 27 transitions. [2019-12-27 19:21:43,195 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:43,195 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:43,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-27 19:21:43,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:43,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-27 19:21:43,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2019-12-27 19:21:43,196 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 15 states. [2019-12-27 19:21:43,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:43,432 INFO L93 Difference]: Finished difference Result 51 states and 104 transitions. [2019-12-27 19:21:43,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:21:43,432 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2019-12-27 19:21:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:43,433 INFO L225 Difference]: With dead ends: 51 [2019-12-27 19:21:43,433 INFO L226 Difference]: Without dead ends: 48 [2019-12-27 19:21:43,434 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 19:21:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-27 19:21:43,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-12-27 19:21:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-27 19:21:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-27 19:21:43,437 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 19 [2019-12-27 19:21:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:43,437 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-27 19:21:43,437 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-27 19:21:43,437 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-27 19:21:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:21:43,438 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:43,438 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:43,642 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:43,642 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:43,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:43,643 INFO L82 PathProgramCache]: Analyzing trace with hash -65021205, now seen corresponding path program 23 times [2019-12-27 19:21:43,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:43,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051186997] [2019-12-27 19:21:43,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:43,773 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 19:21:43,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051186997] [2019-12-27 19:21:43,774 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012780240] [2019-12-27 19:21:43,774 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 19:21:43,829 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-12-27 19:21:43,829 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:43,831 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 19:21:43,832 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:43,850 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 19:21:43,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:43,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 19:21:43,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1535049251] [2019-12-27 19:21:43,851 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:43,852 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:43,855 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 32 transitions. [2019-12-27 19:21:43,855 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:43,856 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:43,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:21:43,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:21:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:21:43,857 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 16 states. [2019-12-27 19:21:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:44,156 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-12-27 19:21:44,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-27 19:21:44,157 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-12-27 19:21:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:44,157 INFO L225 Difference]: With dead ends: 52 [2019-12-27 19:21:44,159 INFO L226 Difference]: Without dead ends: 49 [2019-12-27 19:21:44,159 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 19:21:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-12-27 19:21:44,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2019-12-27 19:21:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-12-27 19:21:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 66 transitions. [2019-12-27 19:21:44,162 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 66 transitions. Word has length 20 [2019-12-27 19:21:44,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:44,162 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 66 transitions. [2019-12-27 19:21:44,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:21:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 66 transitions. [2019-12-27 19:21:44,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-12-27 19:21:44,163 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:44,163 INFO L411 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:44,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:44,364 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:44,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1656842783, now seen corresponding path program 24 times [2019-12-27 19:21:44,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:44,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961624185] [2019-12-27 19:21:44,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:44,471 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 19:21:44,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961624185] [2019-12-27 19:21:44,472 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561237268] [2019-12-27 19:21:44,473 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 19:21:44,531 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-12-27 19:21:44,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:44,532 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-27 19:21:44,533 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:44,590 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 19:21:44,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:44,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-27 19:21:44,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1794058297] [2019-12-27 19:21:44,591 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:44,593 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:44,597 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 25 states and 28 transitions. [2019-12-27 19:21:44,597 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:44,599 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:44,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-27 19:21:44,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-27 19:21:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2019-12-27 19:21:44,605 INFO L87 Difference]: Start difference. First operand 32 states and 66 transitions. Second operand 16 states. [2019-12-27 19:21:44,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:44,863 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-12-27 19:21:44,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 19:21:44,864 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-12-27 19:21:44,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:44,864 INFO L225 Difference]: With dead ends: 53 [2019-12-27 19:21:44,865 INFO L226 Difference]: Without dead ends: 50 [2019-12-27 19:21:44,865 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 19:21:44,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-27 19:21:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-27 19:21:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 19:21:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-27 19:21:44,869 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 20 [2019-12-27 19:21:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:44,870 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-27 19:21:44,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-27 19:21:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-27 19:21:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 19:21:44,871 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:44,871 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:45,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:45,075 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2015657050, now seen corresponding path program 25 times [2019-12-27 19:21:45,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:45,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493939172] [2019-12-27 19:21:45,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:45,226 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 19:21:45,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493939172] [2019-12-27 19:21:45,227 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267430245] [2019-12-27 19:21:45,227 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 19:21:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:45,282 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-27 19:21:45,282 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:45,304 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 19:21:45,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:45,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 19:21:45,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [70381296] [2019-12-27 19:21:45,305 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:45,307 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:45,311 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 33 transitions. [2019-12-27 19:21:45,311 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:45,312 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:45,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:21:45,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:45,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:21:45,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:45,313 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 17 states. [2019-12-27 19:21:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:45,626 INFO L93 Difference]: Finished difference Result 54 states and 110 transitions. [2019-12-27 19:21:45,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-27 19:21:45,626 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-27 19:21:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:45,627 INFO L225 Difference]: With dead ends: 54 [2019-12-27 19:21:45,627 INFO L226 Difference]: Without dead ends: 51 [2019-12-27 19:21:45,628 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 19:21:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-12-27 19:21:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2019-12-27 19:21:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-12-27 19:21:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2019-12-27 19:21:45,631 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 21 [2019-12-27 19:21:45,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:45,631 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2019-12-27 19:21:45,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:21:45,631 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2019-12-27 19:21:45,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-12-27 19:21:45,632 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:45,632 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:45,835 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:45,835 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:45,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash -177481222, now seen corresponding path program 26 times [2019-12-27 19:21:45,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:45,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187745367] [2019-12-27 19:21:45,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:45,978 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 19:21:45,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187745367] [2019-12-27 19:21:45,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008879176] [2019-12-27 19:21:45,979 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 19:21:46,027 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:46,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:46,028 INFO L264 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 19:21:46,029 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:46,057 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 19:21:46,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:46,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-27 19:21:46,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2034290687] [2019-12-27 19:21:46,058 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:46,059 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:46,062 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 26 states and 29 transitions. [2019-12-27 19:21:46,063 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:46,063 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:46,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-27 19:21:46,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:46,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-27 19:21:46,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2019-12-27 19:21:46,064 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand 17 states. [2019-12-27 19:21:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:46,352 INFO L93 Difference]: Finished difference Result 55 states and 112 transitions. [2019-12-27 19:21:46,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:21:46,353 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2019-12-27 19:21:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:46,354 INFO L225 Difference]: With dead ends: 55 [2019-12-27 19:21:46,354 INFO L226 Difference]: Without dead ends: 52 [2019-12-27 19:21:46,354 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 19:21:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-27 19:21:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-12-27 19:21:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 19:21:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 19:21:46,358 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 21 [2019-12-27 19:21:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:46,358 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 19:21:46,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-27 19:21:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 19:21:46,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 19:21:46,359 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:46,359 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:46,562 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:46,562 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1939140947, now seen corresponding path program 27 times [2019-12-27 19:21:46,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:46,563 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914962698] [2019-12-27 19:21:46,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:46,708 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 19:21:46,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914962698] [2019-12-27 19:21:46,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863480145] [2019-12-27 19:21:46,709 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 19:21:46,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-27 19:21:46,783 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:46,784 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 19:21:46,790 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:46,808 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 19:21:46,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:46,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 19:21:46,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2142789670] [2019-12-27 19:21:46,809 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:46,811 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:46,815 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 34 transitions. [2019-12-27 19:21:46,816 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:46,817 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:46,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:21:46,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:46,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:21:46,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:21:46,818 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 18 states. [2019-12-27 19:21:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:47,129 INFO L93 Difference]: Finished difference Result 56 states and 114 transitions. [2019-12-27 19:21:47,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-27 19:21:47,129 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-12-27 19:21:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:47,130 INFO L225 Difference]: With dead ends: 56 [2019-12-27 19:21:47,130 INFO L226 Difference]: Without dead ends: 53 [2019-12-27 19:21:47,131 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 19:21:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-12-27 19:21:47,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2019-12-27 19:21:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-12-27 19:21:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2019-12-27 19:21:47,134 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 22 [2019-12-27 19:21:47,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:47,134 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2019-12-27 19:21:47,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:21:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2019-12-27 19:21:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-12-27 19:21:47,135 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:47,135 INFO L411 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:47,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:47,339 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:47,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1206950281, now seen corresponding path program 28 times [2019-12-27 19:21:47,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:47,341 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609544538] [2019-12-27 19:21:47,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:47,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:47,517 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 19:21:47,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609544538] [2019-12-27 19:21:47,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227311168] [2019-12-27 19:21:47,518 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 19:21:47,605 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:47,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:47,607 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-27 19:21:47,608 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:47,643 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 19:21:47,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:47,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-27 19:21:47,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [845489051] [2019-12-27 19:21:47,645 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:47,651 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:47,716 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 27 states and 30 transitions. [2019-12-27 19:21:47,716 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:47,717 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:47,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-27 19:21:47,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:47,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-27 19:21:47,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-12-27 19:21:47,718 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand 18 states. [2019-12-27 19:21:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:48,061 INFO L93 Difference]: Finished difference Result 57 states and 116 transitions. [2019-12-27 19:21:48,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 19:21:48,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2019-12-27 19:21:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:48,062 INFO L225 Difference]: With dead ends: 57 [2019-12-27 19:21:48,063 INFO L226 Difference]: Without dead ends: 54 [2019-12-27 19:21:48,063 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:21:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-12-27 19:21:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-12-27 19:21:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 19:21:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-27 19:21:48,066 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 22 [2019-12-27 19:21:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:48,066 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-27 19:21:48,066 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-27 19:21:48,066 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-27 19:21:48,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 19:21:48,067 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:48,067 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:48,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:48,270 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:48,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash -16172482, now seen corresponding path program 29 times [2019-12-27 19:21:48,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:48,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796535013] [2019-12-27 19:21:48,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:48,425 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 19:21:48,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796535013] [2019-12-27 19:21:48,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931230854] [2019-12-27 19:21:48,425 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 19:21:48,479 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-12-27 19:21:48,479 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:48,480 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-27 19:21:48,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:48,498 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 19:21:48,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:48,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 19:21:48,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [903293251] [2019-12-27 19:21:48,499 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:48,502 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:48,506 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 35 transitions. [2019-12-27 19:21:48,506 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:48,507 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:48,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:21:48,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:21:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:21:48,508 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 19 states. [2019-12-27 19:21:48,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:48,853 INFO L93 Difference]: Finished difference Result 58 states and 118 transitions. [2019-12-27 19:21:48,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-27 19:21:48,853 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2019-12-27 19:21:48,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:48,854 INFO L225 Difference]: With dead ends: 58 [2019-12-27 19:21:48,854 INFO L226 Difference]: Without dead ends: 55 [2019-12-27 19:21:48,855 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 19:21:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-12-27 19:21:48,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 35. [2019-12-27 19:21:48,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-12-27 19:21:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 72 transitions. [2019-12-27 19:21:48,857 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 72 transitions. Word has length 23 [2019-12-27 19:21:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:48,858 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 72 transitions. [2019-12-27 19:21:48,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:21:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 72 transitions. [2019-12-27 19:21:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-27 19:21:48,858 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:48,858 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:49,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:49,062 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:49,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1239247010, now seen corresponding path program 30 times [2019-12-27 19:21:49,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:49,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057681499] [2019-12-27 19:21:49,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:49,230 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 19:21:49,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057681499] [2019-12-27 19:21:49,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647915188] [2019-12-27 19:21:49,231 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 19:21:49,290 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-12-27 19:21:49,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:49,291 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 19:21:49,292 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:49,308 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 19:21:49,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:49,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-27 19:21:49,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1319419811] [2019-12-27 19:21:49,308 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:49,310 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:49,314 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 28 states and 31 transitions. [2019-12-27 19:21:49,314 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:49,315 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:49,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-27 19:21:49,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:49,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-27 19:21:49,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2019-12-27 19:21:49,316 INFO L87 Difference]: Start difference. First operand 35 states and 72 transitions. Second operand 19 states. [2019-12-27 19:21:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:49,689 INFO L93 Difference]: Finished difference Result 59 states and 120 transitions. [2019-12-27 19:21:49,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:21:49,690 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2019-12-27 19:21:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:49,691 INFO L225 Difference]: With dead ends: 59 [2019-12-27 19:21:49,691 INFO L226 Difference]: Without dead ends: 56 [2019-12-27 19:21:49,692 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 19:21:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-12-27 19:21:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-12-27 19:21:49,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 19:21:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-27 19:21:49,695 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 23 [2019-12-27 19:21:49,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:49,695 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-27 19:21:49,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-27 19:21:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-27 19:21:49,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 19:21:49,696 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:49,696 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:49,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:49,899 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:49,900 INFO L82 PathProgramCache]: Analyzing trace with hash -501346885, now seen corresponding path program 31 times [2019-12-27 19:21:49,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:49,901 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103498504] [2019-12-27 19:21:49,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:50,100 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 19:21:50,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103498504] [2019-12-27 19:21:50,100 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324493620] [2019-12-27 19:21:50,100 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 19:21:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:50,187 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 19:21:50,188 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:50,232 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 19:21:50,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:50,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 19:21:50,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1719210681] [2019-12-27 19:21:50,233 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:50,238 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:50,247 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 36 transitions. [2019-12-27 19:21:50,247 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:50,252 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:50,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:21:50,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:50,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:21:50,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:21:50,254 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 20 states. [2019-12-27 19:21:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:50,712 INFO L93 Difference]: Finished difference Result 60 states and 122 transitions. [2019-12-27 19:21:50,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-27 19:21:50,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-12-27 19:21:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:50,713 INFO L225 Difference]: With dead ends: 60 [2019-12-27 19:21:50,713 INFO L226 Difference]: Without dead ends: 57 [2019-12-27 19:21:50,714 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=426, Invalid=906, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:21:50,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-12-27 19:21:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 36. [2019-12-27 19:21:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-12-27 19:21:50,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 74 transitions. [2019-12-27 19:21:50,717 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 74 transitions. Word has length 24 [2019-12-27 19:21:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:50,717 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 74 transitions. [2019-12-27 19:21:50,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:21:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 74 transitions. [2019-12-27 19:21:50,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-12-27 19:21:50,718 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:50,718 INFO L411 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:50,921 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:50,921 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:50,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:50,921 INFO L82 PathProgramCache]: Analyzing trace with hash -238048049, now seen corresponding path program 32 times [2019-12-27 19:21:50,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:50,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429965085] [2019-12-27 19:21:50,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:51,098 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 19:21:51,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429965085] [2019-12-27 19:21:51,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633001638] [2019-12-27 19:21:51,098 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 19:21:51,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:51,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:51,157 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-27 19:21:51,158 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:51,222 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 19:21:51,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:51,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-27 19:21:51,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [194131430] [2019-12-27 19:21:51,223 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:51,225 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:51,230 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 29 states and 32 transitions. [2019-12-27 19:21:51,230 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:51,230 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:51,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-27 19:21:51,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:51,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-27 19:21:51,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-12-27 19:21:51,231 INFO L87 Difference]: Start difference. First operand 36 states and 74 transitions. Second operand 20 states. [2019-12-27 19:21:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:51,633 INFO L93 Difference]: Finished difference Result 61 states and 124 transitions. [2019-12-27 19:21:51,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 19:21:51,638 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-12-27 19:21:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:51,639 INFO L225 Difference]: With dead ends: 61 [2019-12-27 19:21:51,639 INFO L226 Difference]: Without dead ends: 58 [2019-12-27 19:21:51,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=460, Invalid=946, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:21:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-12-27 19:21:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-12-27 19:21:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 19:21:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-27 19:21:51,642 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 24 [2019-12-27 19:21:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:51,643 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-27 19:21:51,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-27 19:21:51,643 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-27 19:21:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 19:21:51,643 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:51,643 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:51,844 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:51,844 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:51,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1638116054, now seen corresponding path program 33 times [2019-12-27 19:21:51,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:51,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280033973] [2019-12-27 19:21:51,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:52,065 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 19:21:52,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280033973] [2019-12-27 19:21:52,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364589166] [2019-12-27 19:21:52,066 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 19:21:52,127 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-12-27 19:21:52,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:52,128 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 19:21:52,129 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:52,158 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 19:21:52,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:52,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 19:21:52,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1014577250] [2019-12-27 19:21:52,159 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:52,162 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:52,168 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 37 transitions. [2019-12-27 19:21:52,168 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:52,170 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:52,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 19:21:52,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:52,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 19:21:52,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:21:52,171 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 21 states. [2019-12-27 19:21:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:52,577 INFO L93 Difference]: Finished difference Result 62 states and 126 transitions. [2019-12-27 19:21:52,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-27 19:21:52,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-12-27 19:21:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:52,578 INFO L225 Difference]: With dead ends: 62 [2019-12-27 19:21:52,578 INFO L226 Difference]: Without dead ends: 59 [2019-12-27 19:21:52,579 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 19:21:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-12-27 19:21:52,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 37. [2019-12-27 19:21:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-12-27 19:21:52,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 76 transitions. [2019-12-27 19:21:52,582 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 76 transitions. Word has length 25 [2019-12-27 19:21:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:52,582 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 76 transitions. [2019-12-27 19:21:52,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 19:21:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 76 transitions. [2019-12-27 19:21:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-12-27 19:21:52,583 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:52,583 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:52,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:52,784 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1210445130, now seen corresponding path program 34 times [2019-12-27 19:21:52,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:52,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152916727] [2019-12-27 19:21:52,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:52,958 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 19:21:52,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152916727] [2019-12-27 19:21:52,958 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753995032] [2019-12-27 19:21:52,959 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 19:21:53,007 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:53,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:53,009 INFO L264 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 19:21:53,010 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:53,050 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 19:21:53,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:53,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-27 19:21:53,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [702353858] [2019-12-27 19:21:53,052 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:53,055 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:53,062 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 30 states and 33 transitions. [2019-12-27 19:21:53,062 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:53,063 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:53,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-27 19:21:53,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:53,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-27 19:21:53,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2019-12-27 19:21:53,064 INFO L87 Difference]: Start difference. First operand 37 states and 76 transitions. Second operand 21 states. [2019-12-27 19:21:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:53,488 INFO L93 Difference]: Finished difference Result 63 states and 128 transitions. [2019-12-27 19:21:53,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:21:53,488 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2019-12-27 19:21:53,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:53,489 INFO L225 Difference]: With dead ends: 63 [2019-12-27 19:21:53,489 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 19:21:53,491 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=509, Invalid=1051, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:21:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 19:21:53,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 19:21:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 19:21:53,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2019-12-27 19:21:53,493 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 25 [2019-12-27 19:21:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:53,494 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2019-12-27 19:21:53,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-27 19:21:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2019-12-27 19:21:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 19:21:53,494 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:53,494 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:53,695 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:53,695 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:53,696 INFO L82 PathProgramCache]: Analyzing trace with hash -758009821, now seen corresponding path program 35 times [2019-12-27 19:21:53,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:53,697 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554896531] [2019-12-27 19:21:53,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:53,878 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 19:21:53,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554896531] [2019-12-27 19:21:53,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545766082] [2019-12-27 19:21:53,879 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 19:21:53,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-12-27 19:21:53,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:53,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 19:21:53,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:53,969 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 19:21:53,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:53,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 19:21:53,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1910935288] [2019-12-27 19:21:53,970 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:53,972 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:53,977 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 38 transitions. [2019-12-27 19:21:53,977 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:53,980 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:53,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 19:21:53,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 19:21:53,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:21:53,981 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand 22 states. [2019-12-27 19:21:54,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:54,401 INFO L93 Difference]: Finished difference Result 64 states and 130 transitions. [2019-12-27 19:21:54,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-27 19:21:54,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-12-27 19:21:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:54,403 INFO L225 Difference]: With dead ends: 64 [2019-12-27 19:21:54,403 INFO L226 Difference]: Without dead ends: 61 [2019-12-27 19:21:54,404 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 19:21:54,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-27 19:21:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2019-12-27 19:21:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-12-27 19:21:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 78 transitions. [2019-12-27 19:21:54,407 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 78 transitions. Word has length 26 [2019-12-27 19:21:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:54,407 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 78 transitions. [2019-12-27 19:21:54,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 19:21:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 78 transitions. [2019-12-27 19:21:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-27 19:21:54,408 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:54,408 INFO L411 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:54,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:54,611 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:54,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:54,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1130906329, now seen corresponding path program 36 times [2019-12-27 19:21:54,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:54,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353303347] [2019-12-27 19:21:54,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:54,809 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 19:21:54,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353303347] [2019-12-27 19:21:54,810 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731892359] [2019-12-27 19:21:54,810 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 19:21:54,898 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-12-27 19:21:54,898 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:54,900 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2019-12-27 19:21:54,901 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:54,931 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 19:21:54,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:54,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-27 19:21:54,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2086677580] [2019-12-27 19:21:54,932 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:54,938 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:54,948 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 31 states and 34 transitions. [2019-12-27 19:21:54,948 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:54,953 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:54,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-27 19:21:54,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-27 19:21:54,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-12-27 19:21:54,956 INFO L87 Difference]: Start difference. First operand 38 states and 78 transitions. Second operand 22 states. [2019-12-27 19:21:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:55,441 INFO L93 Difference]: Finished difference Result 65 states and 132 transitions. [2019-12-27 19:21:55,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 19:21:55,446 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2019-12-27 19:21:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:55,447 INFO L225 Difference]: With dead ends: 65 [2019-12-27 19:21:55,447 INFO L226 Difference]: Without dead ends: 62 [2019-12-27 19:21:55,448 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=1161, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:21:55,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-12-27 19:21:55,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-12-27 19:21:55,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-12-27 19:21:55,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2019-12-27 19:21:55,450 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 26 [2019-12-27 19:21:55,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:55,450 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2019-12-27 19:21:55,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-27 19:21:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2019-12-27 19:21:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 19:21:55,451 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:55,451 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:55,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:55,655 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2023467666, now seen corresponding path program 37 times [2019-12-27 19:21:55,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:55,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424693046] [2019-12-27 19:21:55,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:55,867 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 19:21:55,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424693046] [2019-12-27 19:21:55,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449242643] [2019-12-27 19:21:55,868 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 19:21:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:55,924 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 19:21:55,925 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:55,953 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 19:21:55,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:55,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 19:21:55,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1179785189] [2019-12-27 19:21:55,954 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:55,957 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:55,964 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 39 transitions. [2019-12-27 19:21:55,964 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:55,965 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:55,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 19:21:55,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:55,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 19:21:55,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:21:55,966 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand 23 states. [2019-12-27 19:21:56,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:56,483 INFO L93 Difference]: Finished difference Result 66 states and 134 transitions. [2019-12-27 19:21:56,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-27 19:21:56,483 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2019-12-27 19:21:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:56,484 INFO L225 Difference]: With dead ends: 66 [2019-12-27 19:21:56,484 INFO L226 Difference]: Without dead ends: 63 [2019-12-27 19:21:56,485 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=1231, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:21:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-12-27 19:21:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2019-12-27 19:21:56,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-12-27 19:21:56,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 80 transitions. [2019-12-27 19:21:56,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 80 transitions. Word has length 27 [2019-12-27 19:21:56,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:56,489 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 80 transitions. [2019-12-27 19:21:56,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 19:21:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 80 transitions. [2019-12-27 19:21:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-12-27 19:21:56,489 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:56,489 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:56,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:56,693 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:56,693 INFO L82 PathProgramCache]: Analyzing trace with hash -698357774, now seen corresponding path program 38 times [2019-12-27 19:21:56,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:56,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803323276] [2019-12-27 19:21:56,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:56,888 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 19:21:56,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803323276] [2019-12-27 19:21:56,889 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982286918] [2019-12-27 19:21:56,889 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 19:21:56,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:21:56,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:56,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2019-12-27 19:21:56,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:56,993 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 19:21:56,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:56,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-27 19:21:56,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1300283589] [2019-12-27 19:21:56,994 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:56,997 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:57,004 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 32 states and 35 transitions. [2019-12-27 19:21:57,004 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:57,005 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:57,005 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 19:21:57,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 19:21:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:21:57,006 INFO L87 Difference]: Start difference. First operand 39 states and 80 transitions. Second operand 23 states. [2019-12-27 19:21:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:57,474 INFO L93 Difference]: Finished difference Result 67 states and 136 transitions. [2019-12-27 19:21:57,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:21:57,474 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2019-12-27 19:21:57,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:57,475 INFO L225 Difference]: With dead ends: 67 [2019-12-27 19:21:57,475 INFO L226 Difference]: Without dead ends: 64 [2019-12-27 19:21:57,477 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 19:21:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-27 19:21:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-12-27 19:21:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-12-27 19:21:57,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2019-12-27 19:21:57,480 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 27 [2019-12-27 19:21:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:57,480 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2019-12-27 19:21:57,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 19:21:57,480 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2019-12-27 19:21:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 19:21:57,480 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:57,481 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:57,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:57,681 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:57,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:57,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1697011851, now seen corresponding path program 39 times [2019-12-27 19:21:57,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:57,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339619833] [2019-12-27 19:21:57,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:57,877 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 19:21:57,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339619833] [2019-12-27 19:21:57,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720840971] [2019-12-27 19:21:57,878 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 19:21:57,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-12-27 19:21:57,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:57,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 19:21:57,940 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:57,997 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 19:21:57,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:57,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 19:21:57,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1587845557] [2019-12-27 19:21:57,998 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:58,000 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:58,006 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 35 states and 40 transitions. [2019-12-27 19:21:58,006 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:58,007 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:21:58,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 19:21:58,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:58,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 19:21:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:21:58,007 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand 24 states. [2019-12-27 19:21:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:58,491 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2019-12-27 19:21:58,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:21:58,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2019-12-27 19:21:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:58,493 INFO L225 Difference]: With dead ends: 68 [2019-12-27 19:21:58,493 INFO L226 Difference]: Without dead ends: 65 [2019-12-27 19:21:58,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1350, Unknown=0, NotChecked=0, Total=1980 [2019-12-27 19:21:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-12-27 19:21:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 40. [2019-12-27 19:21:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-27 19:21:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 82 transitions. [2019-12-27 19:21:58,496 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 82 transitions. Word has length 28 [2019-12-27 19:21:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:58,497 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 82 transitions. [2019-12-27 19:21:58,497 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 19:21:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 82 transitions. [2019-12-27 19:21:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-12-27 19:21:58,497 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:58,497 INFO L411 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:58,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:58,701 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:58,702 INFO L82 PathProgramCache]: Analyzing trace with hash -174254209, now seen corresponding path program 40 times [2019-12-27 19:21:58,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:58,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924885921] [2019-12-27 19:21:58,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:21:58,903 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 19:21:58,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924885921] [2019-12-27 19:21:58,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030726212] [2019-12-27 19:21:58,904 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 19:21:58,959 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:21:58,959 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:21:58,960 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2019-12-27 19:21:58,961 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:21:59,008 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 19:21:59,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:21:59,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-27 19:21:59,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508731367] [2019-12-27 19:21:59,009 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:21:59,012 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:21:59,019 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 33 states and 36 transitions. [2019-12-27 19:21:59,019 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:21:59,020 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:21:59,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-12-27 19:21:59,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:21:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-12-27 19:21:59,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2019-12-27 19:21:59,021 INFO L87 Difference]: Start difference. First operand 40 states and 82 transitions. Second operand 24 states. [2019-12-27 19:21:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:21:59,528 INFO L93 Difference]: Finished difference Result 69 states and 140 transitions. [2019-12-27 19:21:59,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:21:59,528 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2019-12-27 19:21:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:21:59,529 INFO L225 Difference]: With dead ends: 69 [2019-12-27 19:21:59,529 INFO L226 Difference]: Without dead ends: 66 [2019-12-27 19:21:59,530 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=672, Invalid=1398, Unknown=0, NotChecked=0, Total=2070 [2019-12-27 19:21:59,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-12-27 19:21:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-12-27 19:21:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-12-27 19:21:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 134 transitions. [2019-12-27 19:21:59,534 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 134 transitions. Word has length 28 [2019-12-27 19:21:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:21:59,534 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 134 transitions. [2019-12-27 19:21:59,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-12-27 19:21:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 134 transitions. [2019-12-27 19:21:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 19:21:59,535 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:21:59,535 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:21:59,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:21:59,738 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:21:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:21:59,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1067760134, now seen corresponding path program 41 times [2019-12-27 19:21:59,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:21:59,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874913358] [2019-12-27 19:21:59,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:21:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:00,002 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 19:22:00,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874913358] [2019-12-27 19:22:00,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891901516] [2019-12-27 19:22:00,002 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 19:22:00,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-12-27 19:22:00,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:00,069 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2019-12-27 19:22:00,069 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:00,107 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 19:22:00,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:00,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 19:22:00,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [290622351] [2019-12-27 19:22:00,108 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:00,112 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:00,120 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 41 transitions. [2019-12-27 19:22:00,120 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:00,121 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:00,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 19:22:00,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:00,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 19:22:00,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:22:00,123 INFO L87 Difference]: Start difference. First operand 66 states and 134 transitions. Second operand 25 states. [2019-12-27 19:22:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:00,656 INFO L93 Difference]: Finished difference Result 70 states and 142 transitions. [2019-12-27 19:22:00,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-12-27 19:22:00,656 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2019-12-27 19:22:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:00,657 INFO L225 Difference]: With dead ends: 70 [2019-12-27 19:22:00,657 INFO L226 Difference]: Without dead ends: 67 [2019-12-27 19:22:00,659 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 19:22:00,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-12-27 19:22:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 41. [2019-12-27 19:22:00,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-12-27 19:22:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-12-27 19:22:00,661 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 29 [2019-12-27 19:22:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:00,661 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-12-27 19:22:00,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 19:22:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-12-27 19:22:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-12-27 19:22:00,662 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:00,662 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:00,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:00,865 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1106913126, now seen corresponding path program 42 times [2019-12-27 19:22:00,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:00,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401952372] [2019-12-27 19:22:00,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:01,113 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 19:22:01,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401952372] [2019-12-27 19:22:01,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085449328] [2019-12-27 19:22:01,114 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 19:22:01,183 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-12-27 19:22:01,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:01,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 19:22:01,185 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:01,215 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 19:22:01,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:01,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-12-27 19:22:01,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1248710195] [2019-12-27 19:22:01,216 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:01,219 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:01,225 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 34 states and 37 transitions. [2019-12-27 19:22:01,225 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:01,226 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:01,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-12-27 19:22:01,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:01,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-12-27 19:22:01,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2019-12-27 19:22:01,227 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 25 states. [2019-12-27 19:22:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:01,806 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2019-12-27 19:22:01,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:22:01,807 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2019-12-27 19:22:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:01,808 INFO L225 Difference]: With dead ends: 71 [2019-12-27 19:22:01,808 INFO L226 Difference]: Without dead ends: 68 [2019-12-27 19:22:01,810 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 19:22:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-12-27 19:22:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-12-27 19:22:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-12-27 19:22:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 138 transitions. [2019-12-27 19:22:01,813 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 138 transitions. Word has length 29 [2019-12-27 19:22:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:01,813 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 138 transitions. [2019-12-27 19:22:01,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-12-27 19:22:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 138 transitions. [2019-12-27 19:22:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 19:22:01,814 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:01,814 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:02,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:02,017 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1259174157, now seen corresponding path program 43 times [2019-12-27 19:22:02,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:02,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982187322] [2019-12-27 19:22:02,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:02,257 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 19:22:02,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982187322] [2019-12-27 19:22:02,258 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455936278] [2019-12-27 19:22:02,258 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 19:22:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:02,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 19:22:02,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:02,339 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 19:22:02,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:02,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 19:22:02,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [51525848] [2019-12-27 19:22:02,340 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:02,344 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:02,350 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 37 states and 42 transitions. [2019-12-27 19:22:02,350 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:02,351 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:02,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 19:22:02,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:02,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 19:22:02,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:22:02,352 INFO L87 Difference]: Start difference. First operand 68 states and 138 transitions. Second operand 26 states. [2019-12-27 19:22:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:02,915 INFO L93 Difference]: Finished difference Result 72 states and 146 transitions. [2019-12-27 19:22:02,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-12-27 19:22:02,915 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-12-27 19:22:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:02,916 INFO L225 Difference]: With dead ends: 72 [2019-12-27 19:22:02,916 INFO L226 Difference]: Without dead ends: 69 [2019-12-27 19:22:02,917 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=747, Invalid=1605, Unknown=0, NotChecked=0, Total=2352 [2019-12-27 19:22:02,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-12-27 19:22:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2019-12-27 19:22:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-12-27 19:22:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 86 transitions. [2019-12-27 19:22:02,919 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 86 transitions. Word has length 30 [2019-12-27 19:22:02,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:02,920 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 86 transitions. [2019-12-27 19:22:02,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 19:22:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 86 transitions. [2019-12-27 19:22:02,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-27 19:22:02,920 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:02,920 INFO L411 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:03,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:03,121 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:03,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:03,122 INFO L82 PathProgramCache]: Analyzing trace with hash 45431767, now seen corresponding path program 44 times [2019-12-27 19:22:03,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:03,123 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610264256] [2019-12-27 19:22:03,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:03,355 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 19:22:03,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610264256] [2019-12-27 19:22:03,356 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276707158] [2019-12-27 19:22:03,356 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 19:22:03,417 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:22:03,417 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:03,418 INFO L264 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2019-12-27 19:22:03,419 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:03,447 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 19:22:03,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:03,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-12-27 19:22:03,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [681907195] [2019-12-27 19:22:03,448 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:03,451 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:03,458 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 35 states and 38 transitions. [2019-12-27 19:22:03,458 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:03,459 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:03,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-12-27 19:22:03,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-12-27 19:22:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2019-12-27 19:22:03,460 INFO L87 Difference]: Start difference. First operand 42 states and 86 transitions. Second operand 26 states. [2019-12-27 19:22:04,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:04,019 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2019-12-27 19:22:04,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:22:04,020 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-12-27 19:22:04,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:04,020 INFO L225 Difference]: With dead ends: 73 [2019-12-27 19:22:04,021 INFO L226 Difference]: Without dead ends: 70 [2019-12-27 19:22:04,022 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 19:22:04,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-27 19:22:04,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-12-27 19:22:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-12-27 19:22:04,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2019-12-27 19:22:04,025 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 30 [2019-12-27 19:22:04,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:04,025 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2019-12-27 19:22:04,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-12-27 19:22:04,025 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2019-12-27 19:22:04,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 19:22:04,026 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:04,026 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:04,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:04,229 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:04,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:04,229 INFO L82 PathProgramCache]: Analyzing trace with hash -379692898, now seen corresponding path program 45 times [2019-12-27 19:22:04,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:04,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536617059] [2019-12-27 19:22:04,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:04,544 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 19:22:04,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536617059] [2019-12-27 19:22:04,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005514738] [2019-12-27 19:22:04,545 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 19:22:04,608 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-12-27 19:22:04,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:04,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 19:22:04,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:04,639 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 19:22:04,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:04,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 19:22:04,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [555311786] [2019-12-27 19:22:04,639 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:04,642 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:04,649 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 38 states and 43 transitions. [2019-12-27 19:22:04,650 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:04,650 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:04,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 19:22:04,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:04,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 19:22:04,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:22:04,651 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand 27 states. [2019-12-27 19:22:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:05,238 INFO L93 Difference]: Finished difference Result 74 states and 150 transitions. [2019-12-27 19:22:05,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-12-27 19:22:05,239 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2019-12-27 19:22:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:05,240 INFO L225 Difference]: With dead ends: 74 [2019-12-27 19:22:05,240 INFO L226 Difference]: Without dead ends: 71 [2019-12-27 19:22:05,241 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 19:22:05,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-12-27 19:22:05,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 43. [2019-12-27 19:22:05,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-27 19:22:05,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2019-12-27 19:22:05,243 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 31 [2019-12-27 19:22:05,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:05,244 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2019-12-27 19:22:05,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 19:22:05,244 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2019-12-27 19:22:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-12-27 19:22:05,244 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:05,244 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:05,445 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:05,445 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1408384834, now seen corresponding path program 46 times [2019-12-27 19:22:05,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:05,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003853613] [2019-12-27 19:22:05,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:05,738 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 19:22:05,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003853613] [2019-12-27 19:22:05,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480270539] [2019-12-27 19:22:05,739 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 19:22:05,785 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:22:05,785 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:05,786 INFO L264 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2019-12-27 19:22:05,787 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:05,808 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 19:22:05,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:05,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-12-27 19:22:05,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [852672894] [2019-12-27 19:22:05,809 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:05,813 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:05,823 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 36 states and 39 transitions. [2019-12-27 19:22:05,823 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:05,824 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:05,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-27 19:22:05,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:05,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-27 19:22:05,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2019-12-27 19:22:05,825 INFO L87 Difference]: Start difference. First operand 43 states and 88 transitions. Second operand 27 states. [2019-12-27 19:22:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:06,403 INFO L93 Difference]: Finished difference Result 75 states and 152 transitions. [2019-12-27 19:22:06,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:22:06,408 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2019-12-27 19:22:06,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:06,409 INFO L225 Difference]: With dead ends: 75 [2019-12-27 19:22:06,409 INFO L226 Difference]: Without dead ends: 72 [2019-12-27 19:22:06,410 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 19:22:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-12-27 19:22:06,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-12-27 19:22:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-12-27 19:22:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 146 transitions. [2019-12-27 19:22:06,412 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 146 transitions. Word has length 31 [2019-12-27 19:22:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:06,412 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 146 transitions. [2019-12-27 19:22:06,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-27 19:22:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 146 transitions. [2019-12-27 19:22:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 19:22:06,413 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:06,413 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:06,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:06,616 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1114422107, now seen corresponding path program 47 times [2019-12-27 19:22:06,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:06,618 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315520770] [2019-12-27 19:22:06,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:06,864 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 19:22:06,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315520770] [2019-12-27 19:22:06,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225992009] [2019-12-27 19:22:06,865 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 19:22:06,928 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-12-27 19:22:06,929 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:06,930 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 19:22:06,930 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:06,952 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 19:22:06,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:06,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 19:22:06,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1231907990] [2019-12-27 19:22:06,953 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:06,957 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:06,967 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 39 states and 44 transitions. [2019-12-27 19:22:06,967 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:06,968 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:06,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 19:22:06,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:06,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 19:22:06,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:22:06,969 INFO L87 Difference]: Start difference. First operand 72 states and 146 transitions. Second operand 28 states. [2019-12-27 19:22:07,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:07,782 INFO L93 Difference]: Finished difference Result 76 states and 154 transitions. [2019-12-27 19:22:07,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-12-27 19:22:07,783 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2019-12-27 19:22:07,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:07,784 INFO L225 Difference]: With dead ends: 76 [2019-12-27 19:22:07,784 INFO L226 Difference]: Without dead ends: 73 [2019-12-27 19:22:07,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=874, Invalid=1882, Unknown=0, NotChecked=0, Total=2756 [2019-12-27 19:22:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-12-27 19:22:07,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2019-12-27 19:22:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-12-27 19:22:07,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-12-27 19:22:07,789 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 32 [2019-12-27 19:22:07,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:07,790 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-12-27 19:22:07,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 19:22:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-12-27 19:22:07,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-12-27 19:22:07,791 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:07,791 INFO L411 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:07,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:07,995 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:07,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:07,995 INFO L82 PathProgramCache]: Analyzing trace with hash 710257199, now seen corresponding path program 48 times [2019-12-27 19:22:07,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:07,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102252213] [2019-12-27 19:22:07,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:08,433 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 19:22:08,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102252213] [2019-12-27 19:22:08,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073755643] [2019-12-27 19:22:08,434 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 19:22:08,525 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-27 19:22:08,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:08,526 INFO L264 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2019-12-27 19:22:08,528 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:08,556 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 19:22:08,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:08,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-12-27 19:22:08,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1624042708] [2019-12-27 19:22:08,557 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:08,568 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:08,586 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 37 states and 40 transitions. [2019-12-27 19:22:08,586 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:08,587 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:08,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-12-27 19:22:08,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:08,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-12-27 19:22:08,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=610, Unknown=0, NotChecked=0, Total=812 [2019-12-27 19:22:08,588 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 28 states. [2019-12-27 19:22:09,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:09,197 INFO L93 Difference]: Finished difference Result 77 states and 156 transitions. [2019-12-27 19:22:09,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:22:09,197 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2019-12-27 19:22:09,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:09,198 INFO L225 Difference]: With dead ends: 77 [2019-12-27 19:22:09,198 INFO L226 Difference]: Without dead ends: 74 [2019-12-27 19:22:09,199 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=924, Invalid=1938, Unknown=0, NotChecked=0, Total=2862 [2019-12-27 19:22:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-12-27 19:22:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-12-27 19:22:09,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-12-27 19:22:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2019-12-27 19:22:09,202 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 32 [2019-12-27 19:22:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:09,202 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2019-12-27 19:22:09,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-12-27 19:22:09,202 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2019-12-27 19:22:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 19:22:09,202 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:09,203 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:09,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:09,403 INFO L410 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash 187347254, now seen corresponding path program 49 times [2019-12-27 19:22:09,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:09,406 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145290522] [2019-12-27 19:22:09,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:09,695 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 19:22:09,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145290522] [2019-12-27 19:22:09,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668870393] [2019-12-27 19:22:09,696 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 19:22:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:09,754 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 19:22:09,755 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:09,799 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 19:22:09,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:09,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 19:22:09,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1515198999] [2019-12-27 19:22:09,800 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:09,805 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:09,817 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 40 states and 45 transitions. [2019-12-27 19:22:09,817 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:09,818 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:09,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 19:22:09,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 19:22:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:22:09,819 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand 29 states. [2019-12-27 19:22:10,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:10,682 INFO L93 Difference]: Finished difference Result 78 states and 158 transitions. [2019-12-27 19:22:10,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-12-27 19:22:10,682 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2019-12-27 19:22:10,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:10,683 INFO L225 Difference]: With dead ends: 78 [2019-12-27 19:22:10,683 INFO L226 Difference]: Without dead ends: 75 [2019-12-27 19:22:10,684 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=941, Invalid=2029, Unknown=0, NotChecked=0, Total=2970 [2019-12-27 19:22:10,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-12-27 19:22:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2019-12-27 19:22:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-12-27 19:22:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 92 transitions. [2019-12-27 19:22:10,687 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 92 transitions. Word has length 33 [2019-12-27 19:22:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:10,687 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 92 transitions. [2019-12-27 19:22:10,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 19:22:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 92 transitions. [2019-12-27 19:22:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-12-27 19:22:10,688 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:10,688 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:10,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:10,891 INFO L410 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:10,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash 543136746, now seen corresponding path program 50 times [2019-12-27 19:22:10,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:10,894 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083105209] [2019-12-27 19:22:10,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:11,194 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 19:22:11,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083105209] [2019-12-27 19:22:11,194 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274139179] [2019-12-27 19:22:11,194 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 19:22:11,250 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:22:11,251 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:11,252 INFO L264 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2019-12-27 19:22:11,253 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:11,288 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 19:22:11,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:11,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-12-27 19:22:11,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1368788431] [2019-12-27 19:22:11,289 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:11,293 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:11,303 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 38 states and 41 transitions. [2019-12-27 19:22:11,303 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:11,304 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:11,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-12-27 19:22:11,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-12-27 19:22:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2019-12-27 19:22:11,305 INFO L87 Difference]: Start difference. First operand 45 states and 92 transitions. Second operand 29 states. [2019-12-27 19:22:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:11,946 INFO L93 Difference]: Finished difference Result 79 states and 160 transitions. [2019-12-27 19:22:11,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:22:11,947 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2019-12-27 19:22:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:11,948 INFO L225 Difference]: With dead ends: 79 [2019-12-27 19:22:11,948 INFO L226 Difference]: Without dead ends: 76 [2019-12-27 19:22:11,949 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 19:22:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-12-27 19:22:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-12-27 19:22:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-12-27 19:22:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2019-12-27 19:22:11,952 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 33 [2019-12-27 19:22:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:11,952 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2019-12-27 19:22:11,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-12-27 19:22:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2019-12-27 19:22:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 19:22:11,953 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:11,953 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:12,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:12,153 INFO L410 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1512797635, now seen corresponding path program 51 times [2019-12-27 19:22:12,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:12,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764938272] [2019-12-27 19:22:12,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:12,458 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 19:22:12,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764938272] [2019-12-27 19:22:12,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024685016] [2019-12-27 19:22:12,459 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 19:22:12,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-27 19:22:12,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:12,523 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 19:22:12,524 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:12,561 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 19:22:12,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:12,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 19:22:12,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [350325820] [2019-12-27 19:22:12,562 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:12,565 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:12,574 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 41 states and 46 transitions. [2019-12-27 19:22:12,574 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:12,575 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:12,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 19:22:12,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:12,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 19:22:12,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:22:12,576 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand 30 states. [2019-12-27 19:22:13,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:13,250 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2019-12-27 19:22:13,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-27 19:22:13,250 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2019-12-27 19:22:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:13,251 INFO L225 Difference]: With dead ends: 80 [2019-12-27 19:22:13,252 INFO L226 Difference]: Without dead ends: 77 [2019-12-27 19:22:13,252 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 19:22:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-12-27 19:22:13,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2019-12-27 19:22:13,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-27 19:22:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 94 transitions. [2019-12-27 19:22:13,255 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 94 transitions. Word has length 34 [2019-12-27 19:22:13,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:13,256 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 94 transitions. [2019-12-27 19:22:13,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 19:22:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 94 transitions. [2019-12-27 19:22:13,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-27 19:22:13,256 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:13,256 INFO L411 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:13,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:13,460 INFO L410 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:13,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:13,460 INFO L82 PathProgramCache]: Analyzing trace with hash -342629753, now seen corresponding path program 52 times [2019-12-27 19:22:13,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:13,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614461170] [2019-12-27 19:22:13,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:13,805 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 19:22:13,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614461170] [2019-12-27 19:22:13,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873451631] [2019-12-27 19:22:13,806 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 19:22:13,862 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:22:13,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:13,864 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2019-12-27 19:22:13,865 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:13,901 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 19:22:13,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:13,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-12-27 19:22:13,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1650342286] [2019-12-27 19:22:13,902 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:13,905 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:13,913 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 39 states and 42 transitions. [2019-12-27 19:22:13,914 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:13,914 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:13,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-12-27 19:22:13,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:13,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-12-27 19:22:13,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2019-12-27 19:22:13,915 INFO L87 Difference]: Start difference. First operand 46 states and 94 transitions. Second operand 30 states. [2019-12-27 19:22:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:14,601 INFO L93 Difference]: Finished difference Result 81 states and 164 transitions. [2019-12-27 19:22:14,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:22:14,601 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2019-12-27 19:22:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:14,602 INFO L225 Difference]: With dead ends: 81 [2019-12-27 19:22:14,602 INFO L226 Difference]: Without dead ends: 78 [2019-12-27 19:22:14,603 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1065, Invalid=2241, Unknown=0, NotChecked=0, Total=3306 [2019-12-27 19:22:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-12-27 19:22:14,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-12-27 19:22:14,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-12-27 19:22:14,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2019-12-27 19:22:14,606 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 34 [2019-12-27 19:22:14,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:14,606 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2019-12-27 19:22:14,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-12-27 19:22:14,606 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2019-12-27 19:22:14,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 19:22:14,607 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:14,607 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:14,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:14,810 INFO L410 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:14,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash -347913266, now seen corresponding path program 53 times [2019-12-27 19:22:14,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:14,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473152608] [2019-12-27 19:22:14,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:14,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:15,109 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 19:22:15,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473152608] [2019-12-27 19:22:15,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128613930] [2019-12-27 19:22:15,109 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 19:22:15,173 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-12-27 19:22:15,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:15,175 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 19:22:15,175 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:15,211 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 19:22:15,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:15,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 19:22:15,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1856005292] [2019-12-27 19:22:15,212 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:15,217 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:15,230 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 42 states and 47 transitions. [2019-12-27 19:22:15,231 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:15,232 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:15,232 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 19:22:15,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:15,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 19:22:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:22:15,233 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand 31 states. [2019-12-27 19:22:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:15,959 INFO L93 Difference]: Finished difference Result 82 states and 166 transitions. [2019-12-27 19:22:15,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-12-27 19:22:15,960 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2019-12-27 19:22:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:15,961 INFO L225 Difference]: With dead ends: 82 [2019-12-27 19:22:15,961 INFO L226 Difference]: Without dead ends: 79 [2019-12-27 19:22:15,962 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1083, Invalid=2339, Unknown=0, NotChecked=0, Total=3422 [2019-12-27 19:22:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-12-27 19:22:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2019-12-27 19:22:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-27 19:22:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 96 transitions. [2019-12-27 19:22:15,965 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 96 transitions. Word has length 35 [2019-12-27 19:22:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:15,965 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 96 transitions. [2019-12-27 19:22:15,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 19:22:15,965 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 96 transitions. [2019-12-27 19:22:15,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-12-27 19:22:15,966 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:15,966 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:16,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:16,169 INFO L410 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:16,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:16,170 INFO L82 PathProgramCache]: Analyzing trace with hash -2031587694, now seen corresponding path program 54 times [2019-12-27 19:22:16,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:16,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735255433] [2019-12-27 19:22:16,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:16,676 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 19:22:16,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735255433] [2019-12-27 19:22:16,676 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96461971] [2019-12-27 19:22:16,676 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 19:22:16,798 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2019-12-27 19:22:16,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:16,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 32 conjunts are in the unsatisfiable core [2019-12-27 19:22:16,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:16,844 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 19:22:16,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:16,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-12-27 19:22:16,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [727642056] [2019-12-27 19:22:16,845 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:16,851 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:16,864 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 40 states and 43 transitions. [2019-12-27 19:22:16,864 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:16,865 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:16,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-12-27 19:22:16,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-12-27 19:22:16,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2019-12-27 19:22:16,866 INFO L87 Difference]: Start difference. First operand 47 states and 96 transitions. Second operand 31 states. [2019-12-27 19:22:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:17,866 INFO L93 Difference]: Finished difference Result 83 states and 168 transitions. [2019-12-27 19:22:17,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:22:17,866 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2019-12-27 19:22:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:17,867 INFO L225 Difference]: With dead ends: 83 [2019-12-27 19:22:17,867 INFO L226 Difference]: Without dead ends: 80 [2019-12-27 19:22:17,867 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1139, Invalid=2401, Unknown=0, NotChecked=0, Total=3540 [2019-12-27 19:22:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-12-27 19:22:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-12-27 19:22:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-12-27 19:22:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2019-12-27 19:22:17,870 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 35 [2019-12-27 19:22:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:17,870 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2019-12-27 19:22:17,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-12-27 19:22:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2019-12-27 19:22:17,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 19:22:17,871 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:17,871 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:18,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:18,074 INFO L410 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:18,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:18,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2099590699, now seen corresponding path program 55 times [2019-12-27 19:22:18,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:18,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360647216] [2019-12-27 19:22:18,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:18,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:18,426 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 19:22:18,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360647216] [2019-12-27 19:22:18,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178516419] [2019-12-27 19:22:18,427 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 19:22:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:18,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 19:22:18,490 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:18,529 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 19:22:18,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:18,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 19:22:18,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [113329655] [2019-12-27 19:22:18,530 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:18,535 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:18,546 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 43 states and 48 transitions. [2019-12-27 19:22:18,546 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:18,547 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:18,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 19:22:18,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 19:22:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:22:18,548 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 32 states. [2019-12-27 19:22:19,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:19,493 INFO L93 Difference]: Finished difference Result 84 states and 170 transitions. [2019-12-27 19:22:19,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-12-27 19:22:19,494 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2019-12-27 19:22:19,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:19,495 INFO L225 Difference]: With dead ends: 84 [2019-12-27 19:22:19,495 INFO L226 Difference]: Without dead ends: 81 [2019-12-27 19:22:19,497 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1158, Invalid=2502, Unknown=0, NotChecked=0, Total=3660 [2019-12-27 19:22:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-12-27 19:22:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2019-12-27 19:22:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-12-27 19:22:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 98 transitions. [2019-12-27 19:22:19,500 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 98 transitions. Word has length 36 [2019-12-27 19:22:19,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:19,501 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 98 transitions. [2019-12-27 19:22:19,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 19:22:19,501 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 98 transitions. [2019-12-27 19:22:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-12-27 19:22:19,502 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:19,502 INFO L411 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:19,703 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:19,703 INFO L410 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:19,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:19,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1445291231, now seen corresponding path program 56 times [2019-12-27 19:22:19,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:19,704 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398876771] [2019-12-27 19:22:19,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:20,194 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 19:22:20,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398876771] [2019-12-27 19:22:20,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54239391] [2019-12-27 19:22:20,195 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 19:22:20,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:22:20,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:20,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 33 conjunts are in the unsatisfiable core [2019-12-27 19:22:20,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:20,299 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 19:22:20,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:20,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-12-27 19:22:20,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1188179526] [2019-12-27 19:22:20,300 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:20,303 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:20,312 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 41 states and 44 transitions. [2019-12-27 19:22:20,313 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:20,313 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:20,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-12-27 19:22:20,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:20,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-12-27 19:22:20,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2019-12-27 19:22:20,314 INFO L87 Difference]: Start difference. First operand 48 states and 98 transitions. Second operand 32 states. [2019-12-27 19:22:21,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:21,050 INFO L93 Difference]: Finished difference Result 85 states and 172 transitions. [2019-12-27 19:22:21,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:22:21,050 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2019-12-27 19:22:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:21,051 INFO L225 Difference]: With dead ends: 85 [2019-12-27 19:22:21,051 INFO L226 Difference]: Without dead ends: 82 [2019-12-27 19:22:21,052 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1216, Invalid=2566, Unknown=0, NotChecked=0, Total=3782 [2019-12-27 19:22:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-12-27 19:22:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-12-27 19:22:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-12-27 19:22:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 166 transitions. [2019-12-27 19:22:21,055 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 166 transitions. Word has length 36 [2019-12-27 19:22:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:21,055 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 166 transitions. [2019-12-27 19:22:21,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-12-27 19:22:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 166 transitions. [2019-12-27 19:22:21,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 19:22:21,056 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:21,056 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:21,259 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:21,259 INFO L410 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:21,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:21,260 INFO L82 PathProgramCache]: Analyzing trace with hash 662802534, now seen corresponding path program 57 times [2019-12-27 19:22:21,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:21,261 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985716755] [2019-12-27 19:22:21,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:21,606 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 19:22:21,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985716755] [2019-12-27 19:22:21,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301275950] [2019-12-27 19:22:21,607 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 19:22:21,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-12-27 19:22:21,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:21,680 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 19:22:21,681 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:21,710 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 19:22:21,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:21,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 19:22:21,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1831848153] [2019-12-27 19:22:21,711 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:21,715 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:21,726 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 44 states and 49 transitions. [2019-12-27 19:22:21,726 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:21,727 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:21,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 19:22:21,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 19:22:21,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:22:21,728 INFO L87 Difference]: Start difference. First operand 82 states and 166 transitions. Second operand 33 states. [2019-12-27 19:22:22,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:22,540 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2019-12-27 19:22:22,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-12-27 19:22:22,540 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2019-12-27 19:22:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:22,541 INFO L225 Difference]: With dead ends: 86 [2019-12-27 19:22:22,541 INFO L226 Difference]: Without dead ends: 83 [2019-12-27 19:22:22,542 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1235, Invalid=2671, Unknown=0, NotChecked=0, Total=3906 [2019-12-27 19:22:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-12-27 19:22:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2019-12-27 19:22:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-12-27 19:22:22,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 100 transitions. [2019-12-27 19:22:22,544 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 100 transitions. Word has length 37 [2019-12-27 19:22:22,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:22,545 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 100 transitions. [2019-12-27 19:22:22,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 19:22:22,545 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 100 transitions. [2019-12-27 19:22:22,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-12-27 19:22:22,545 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:22,545 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:22,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:22,749 INFO L410 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:22,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:22,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1854355258, now seen corresponding path program 58 times [2019-12-27 19:22:22,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:22,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434782572] [2019-12-27 19:22:22,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:23,282 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 19:22:23,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434782572] [2019-12-27 19:22:23,283 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283714725] [2019-12-27 19:22:23,283 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 19:22:23,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:22:23,344 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:23,345 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 34 conjunts are in the unsatisfiable core [2019-12-27 19:22:23,346 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:23,381 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 19:22:23,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:23,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-12-27 19:22:23,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2005253901] [2019-12-27 19:22:23,382 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:23,388 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:23,402 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 42 states and 45 transitions. [2019-12-27 19:22:23,402 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:23,403 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:23,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-12-27 19:22:23,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:23,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-12-27 19:22:23,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2019-12-27 19:22:23,404 INFO L87 Difference]: Start difference. First operand 49 states and 100 transitions. Second operand 33 states. [2019-12-27 19:22:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:24,213 INFO L93 Difference]: Finished difference Result 87 states and 176 transitions. [2019-12-27 19:22:24,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:22:24,214 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2019-12-27 19:22:24,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:24,215 INFO L225 Difference]: With dead ends: 87 [2019-12-27 19:22:24,215 INFO L226 Difference]: Without dead ends: 84 [2019-12-27 19:22:24,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1295, Invalid=2737, Unknown=0, NotChecked=0, Total=4032 [2019-12-27 19:22:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-12-27 19:22:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-12-27 19:22:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-12-27 19:22:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2019-12-27 19:22:24,220 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 37 [2019-12-27 19:22:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:24,220 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2019-12-27 19:22:24,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-12-27 19:22:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2019-12-27 19:22:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 19:22:24,220 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:24,221 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:24,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:24,424 INFO L410 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:24,424 INFO L82 PathProgramCache]: Analyzing trace with hash -927957869, now seen corresponding path program 59 times [2019-12-27 19:22:24,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:24,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105324360] [2019-12-27 19:22:24,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:25,071 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 19:22:25,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105324360] [2019-12-27 19:22:25,072 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026271009] [2019-12-27 19:22:25,072 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 19:22:25,181 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-12-27 19:22:25,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:25,184 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 19:22:25,186 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:25,245 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 19:22:25,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:25,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 19:22:25,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1288249971] [2019-12-27 19:22:25,246 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:25,251 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:25,274 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 45 states and 50 transitions. [2019-12-27 19:22:25,274 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:25,275 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:25,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 19:22:25,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 19:22:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:22:25,277 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand 34 states. [2019-12-27 19:22:26,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:26,178 INFO L93 Difference]: Finished difference Result 88 states and 178 transitions. [2019-12-27 19:22:26,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-12-27 19:22:26,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2019-12-27 19:22:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:26,179 INFO L225 Difference]: With dead ends: 88 [2019-12-27 19:22:26,179 INFO L226 Difference]: Without dead ends: 85 [2019-12-27 19:22:26,180 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1315, Invalid=2845, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 19:22:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-12-27 19:22:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2019-12-27 19:22:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-27 19:22:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 102 transitions. [2019-12-27 19:22:26,181 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 102 transitions. Word has length 38 [2019-12-27 19:22:26,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:26,181 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 102 transitions. [2019-12-27 19:22:26,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 19:22:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 102 transitions. [2019-12-27 19:22:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-12-27 19:22:26,182 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:26,182 INFO L411 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:26,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:26,383 INFO L410 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:26,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:26,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1650438455, now seen corresponding path program 60 times [2019-12-27 19:22:26,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:26,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088208509] [2019-12-27 19:22:26,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:26,741 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 19:22:26,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088208509] [2019-12-27 19:22:26,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810744351] [2019-12-27 19:22:26,742 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 19:22:26,819 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-12-27 19:22:26,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:26,821 INFO L264 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2019-12-27 19:22:26,822 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:26,845 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 19:22:26,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:26,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-12-27 19:22:26,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1508170535] [2019-12-27 19:22:26,847 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:26,852 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:26,866 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 43 states and 46 transitions. [2019-12-27 19:22:26,867 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:26,867 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:26,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-12-27 19:22:26,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:26,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-12-27 19:22:26,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2019-12-27 19:22:26,868 INFO L87 Difference]: Start difference. First operand 50 states and 102 transitions. Second operand 34 states. [2019-12-27 19:22:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:28,108 INFO L93 Difference]: Finished difference Result 89 states and 180 transitions. [2019-12-27 19:22:28,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:22:28,108 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2019-12-27 19:22:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:28,109 INFO L225 Difference]: With dead ends: 89 [2019-12-27 19:22:28,109 INFO L226 Difference]: Without dead ends: 86 [2019-12-27 19:22:28,110 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1377, Invalid=2913, Unknown=0, NotChecked=0, Total=4290 [2019-12-27 19:22:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-12-27 19:22:28,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-12-27 19:22:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-27 19:22:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 174 transitions. [2019-12-27 19:22:28,112 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 174 transitions. Word has length 38 [2019-12-27 19:22:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:28,113 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 174 transitions. [2019-12-27 19:22:28,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-12-27 19:22:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 174 transitions. [2019-12-27 19:22:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 19:22:28,113 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:28,113 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:28,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:28,317 INFO L410 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1298077438, now seen corresponding path program 61 times [2019-12-27 19:22:28,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:28,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795115335] [2019-12-27 19:22:28,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:28,939 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 19:22:28,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795115335] [2019-12-27 19:22:28,940 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768599063] [2019-12-27 19:22:28,940 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 19:22:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:29,051 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 19:22:29,053 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:29,102 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 19:22:29,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:29,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 19:22:29,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1667283158] [2019-12-27 19:22:29,103 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:29,114 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:29,137 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 46 states and 51 transitions. [2019-12-27 19:22:29,138 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:29,139 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:29,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 19:22:29,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:29,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 19:22:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:22:29,141 INFO L87 Difference]: Start difference. First operand 86 states and 174 transitions. Second operand 35 states. [2019-12-27 19:22:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:30,154 INFO L93 Difference]: Finished difference Result 90 states and 182 transitions. [2019-12-27 19:22:30,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-12-27 19:22:30,154 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2019-12-27 19:22:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:30,155 INFO L225 Difference]: With dead ends: 90 [2019-12-27 19:22:30,155 INFO L226 Difference]: Without dead ends: 87 [2019-12-27 19:22:30,156 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1397, Invalid=3025, Unknown=0, NotChecked=0, Total=4422 [2019-12-27 19:22:30,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-12-27 19:22:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 51. [2019-12-27 19:22:30,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-12-27 19:22:30,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 104 transitions. [2019-12-27 19:22:30,159 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 104 transitions. Word has length 39 [2019-12-27 19:22:30,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:30,159 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 104 transitions. [2019-12-27 19:22:30,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 19:22:30,159 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 104 transitions. [2019-12-27 19:22:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-27 19:22:30,160 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:30,160 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:30,363 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:30,363 INFO L410 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash -376015390, now seen corresponding path program 62 times [2019-12-27 19:22:30,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:30,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398925467] [2019-12-27 19:22:30,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:30,737 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 19:22:30,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398925467] [2019-12-27 19:22:30,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053210183] [2019-12-27 19:22:30,737 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 19:22:30,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:22:30,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:30,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 36 conjunts are in the unsatisfiable core [2019-12-27 19:22:30,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:30,851 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 19:22:30,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:30,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-12-27 19:22:30,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [52912833] [2019-12-27 19:22:30,852 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:30,858 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:30,874 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 44 states and 47 transitions. [2019-12-27 19:22:30,874 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:30,875 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:30,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-12-27 19:22:30,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:30,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-12-27 19:22:30,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2019-12-27 19:22:30,877 INFO L87 Difference]: Start difference. First operand 51 states and 104 transitions. Second operand 35 states. [2019-12-27 19:22:31,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:31,952 INFO L93 Difference]: Finished difference Result 91 states and 184 transitions. [2019-12-27 19:22:31,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:22:31,952 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2019-12-27 19:22:31,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:31,953 INFO L225 Difference]: With dead ends: 91 [2019-12-27 19:22:31,953 INFO L226 Difference]: Without dead ends: 88 [2019-12-27 19:22:31,954 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1461, Invalid=3095, Unknown=0, NotChecked=0, Total=4556 [2019-12-27 19:22:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-12-27 19:22:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-12-27 19:22:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-12-27 19:22:31,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 178 transitions. [2019-12-27 19:22:31,957 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 178 transitions. Word has length 39 [2019-12-27 19:22:31,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:31,957 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 178 transitions. [2019-12-27 19:22:31,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-12-27 19:22:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 178 transitions. [2019-12-27 19:22:31,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 19:22:31,958 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:31,958 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:32,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:32,160 INFO L410 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1585694971, now seen corresponding path program 63 times [2019-12-27 19:22:32,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:32,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399183439] [2019-12-27 19:22:32,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:32,607 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 19:22:32,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399183439] [2019-12-27 19:22:32,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761762863] [2019-12-27 19:22:32,608 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 19:22:32,687 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-12-27 19:22:32,688 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:32,689 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 19:22:32,690 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:32,725 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 19:22:32,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:32,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 19:22:32,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1779259510] [2019-12-27 19:22:32,726 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:32,729 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:32,742 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 47 states and 52 transitions. [2019-12-27 19:22:32,742 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:32,743 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:32,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 19:22:32,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:32,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 19:22:32,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:22:32,744 INFO L87 Difference]: Start difference. First operand 88 states and 178 transitions. Second operand 36 states. [2019-12-27 19:22:33,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:33,673 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2019-12-27 19:22:33,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-12-27 19:22:33,673 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2019-12-27 19:22:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:33,674 INFO L225 Difference]: With dead ends: 92 [2019-12-27 19:22:33,675 INFO L226 Difference]: Without dead ends: 89 [2019-12-27 19:22:33,675 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1482, Invalid=3210, Unknown=0, NotChecked=0, Total=4692 [2019-12-27 19:22:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-12-27 19:22:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 52. [2019-12-27 19:22:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-27 19:22:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 106 transitions. [2019-12-27 19:22:33,678 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 106 transitions. Word has length 40 [2019-12-27 19:22:33,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:33,678 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 106 transitions. [2019-12-27 19:22:33,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 19:22:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 106 transitions. [2019-12-27 19:22:33,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-12-27 19:22:33,678 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:33,679 INFO L411 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:33,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:33,882 INFO L410 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:33,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:33,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1228425103, now seen corresponding path program 64 times [2019-12-27 19:22:33,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:33,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198855141] [2019-12-27 19:22:33,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:34,270 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 19:22:34,270 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198855141] [2019-12-27 19:22:34,271 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331251819] [2019-12-27 19:22:34,271 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 19:22:34,328 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:22:34,329 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:34,330 INFO L264 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 37 conjunts are in the unsatisfiable core [2019-12-27 19:22:34,331 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:34,360 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 19:22:34,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:34,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-12-27 19:22:34,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [181726902] [2019-12-27 19:22:34,362 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:34,364 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:34,380 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 45 states and 48 transitions. [2019-12-27 19:22:34,380 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:34,381 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:34,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-12-27 19:22:34,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:34,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-12-27 19:22:34,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2019-12-27 19:22:34,382 INFO L87 Difference]: Start difference. First operand 52 states and 106 transitions. Second operand 36 states. [2019-12-27 19:22:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:35,288 INFO L93 Difference]: Finished difference Result 93 states and 188 transitions. [2019-12-27 19:22:35,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:22:35,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2019-12-27 19:22:35,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:35,290 INFO L225 Difference]: With dead ends: 93 [2019-12-27 19:22:35,290 INFO L226 Difference]: Without dead ends: 90 [2019-12-27 19:22:35,291 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1548, Invalid=3282, Unknown=0, NotChecked=0, Total=4830 [2019-12-27 19:22:35,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-12-27 19:22:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-12-27 19:22:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-12-27 19:22:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 182 transitions. [2019-12-27 19:22:35,293 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 182 transitions. Word has length 40 [2019-12-27 19:22:35,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:35,295 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 182 transitions. [2019-12-27 19:22:35,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-12-27 19:22:35,295 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 182 transitions. [2019-12-27 19:22:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 19:22:35,295 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:35,295 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:35,496 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:35,496 INFO L410 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:35,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1911904150, now seen corresponding path program 65 times [2019-12-27 19:22:35,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:35,498 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158211377] [2019-12-27 19:22:35,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:35,966 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 19:22:35,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158211377] [2019-12-27 19:22:35,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521681381] [2019-12-27 19:22:35,967 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 19:22:36,038 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-12-27 19:22:36,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:36,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 19:22:36,040 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:36,084 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 19:22:36,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:36,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 19:22:36,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [972566254] [2019-12-27 19:22:36,085 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:36,088 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:36,107 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 48 states and 53 transitions. [2019-12-27 19:22:36,107 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:36,108 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:36,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 19:22:36,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:36,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 19:22:36,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:22:36,109 INFO L87 Difference]: Start difference. First operand 90 states and 182 transitions. Second operand 37 states. [2019-12-27 19:22:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:37,314 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2019-12-27 19:22:37,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-12-27 19:22:37,315 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2019-12-27 19:22:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:37,316 INFO L225 Difference]: With dead ends: 94 [2019-12-27 19:22:37,316 INFO L226 Difference]: Without dead ends: 91 [2019-12-27 19:22:37,317 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 19:22:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-12-27 19:22:37,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 53. [2019-12-27 19:22:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-12-27 19:22:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2019-12-27 19:22:37,318 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 41 [2019-12-27 19:22:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:37,319 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2019-12-27 19:22:37,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 19:22:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2019-12-27 19:22:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-27 19:22:37,319 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:37,319 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:37,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:37,520 INFO L410 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:37,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -573527414, now seen corresponding path program 66 times [2019-12-27 19:22:37,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:37,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090960562] [2019-12-27 19:22:37,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:37,983 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 19:22:37,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090960562] [2019-12-27 19:22:37,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943999052] [2019-12-27 19:22:37,984 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 19:22:38,063 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-12-27 19:22:38,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:38,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2019-12-27 19:22:38,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:38,099 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 19:22:38,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:38,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-12-27 19:22:38,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [793158923] [2019-12-27 19:22:38,101 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:38,104 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:38,116 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 46 states and 49 transitions. [2019-12-27 19:22:38,116 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:38,117 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:38,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-12-27 19:22:38,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:38,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-12-27 19:22:38,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1058, Unknown=0, NotChecked=0, Total=1406 [2019-12-27 19:22:38,118 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand 37 states. [2019-12-27 19:22:39,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:39,083 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2019-12-27 19:22:39,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:22:39,084 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2019-12-27 19:22:39,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:39,085 INFO L225 Difference]: With dead ends: 95 [2019-12-27 19:22:39,085 INFO L226 Difference]: Without dead ends: 92 [2019-12-27 19:22:39,086 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 19:22:39,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-12-27 19:22:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-12-27 19:22:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-27 19:22:39,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 186 transitions. [2019-12-27 19:22:39,089 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 186 transitions. Word has length 41 [2019-12-27 19:22:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:39,089 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 186 transitions. [2019-12-27 19:22:39,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-12-27 19:22:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 186 transitions. [2019-12-27 19:22:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 19:22:39,090 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:39,090 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:39,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:39,293 INFO L410 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:39,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:39,294 INFO L82 PathProgramCache]: Analyzing trace with hash -860513437, now seen corresponding path program 67 times [2019-12-27 19:22:39,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:39,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389500343] [2019-12-27 19:22:39,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:39,735 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 19:22:39,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389500343] [2019-12-27 19:22:39,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067888085] [2019-12-27 19:22:39,735 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 19:22:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:39,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-27 19:22:39,801 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:39,842 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 19:22:39,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:39,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 19:22:39,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [186643870] [2019-12-27 19:22:39,843 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:39,850 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:39,872 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 49 states and 54 transitions. [2019-12-27 19:22:39,872 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:39,873 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:39,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 19:22:39,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:39,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 19:22:39,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:22:39,874 INFO L87 Difference]: Start difference. First operand 92 states and 186 transitions. Second operand 38 states. [2019-12-27 19:22:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:40,900 INFO L93 Difference]: Finished difference Result 96 states and 194 transitions. [2019-12-27 19:22:40,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-12-27 19:22:40,900 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2019-12-27 19:22:40,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:40,901 INFO L225 Difference]: With dead ends: 96 [2019-12-27 19:22:40,901 INFO L226 Difference]: Without dead ends: 93 [2019-12-27 19:22:40,902 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1659, Invalid=3597, Unknown=0, NotChecked=0, Total=5256 [2019-12-27 19:22:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-12-27 19:22:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2019-12-27 19:22:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-12-27 19:22:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 110 transitions. [2019-12-27 19:22:40,905 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 110 transitions. Word has length 42 [2019-12-27 19:22:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:40,905 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 110 transitions. [2019-12-27 19:22:40,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 19:22:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 110 transitions. [2019-12-27 19:22:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-12-27 19:22:40,906 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:40,906 INFO L411 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:41,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:41,109 INFO L410 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:41,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:41,110 INFO L82 PathProgramCache]: Analyzing trace with hash -599480345, now seen corresponding path program 68 times [2019-12-27 19:22:41,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:41,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502095578] [2019-12-27 19:22:41,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:41,528 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 19:22:41,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502095578] [2019-12-27 19:22:41,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078778093] [2019-12-27 19:22:41,529 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 19:22:41,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:22:41,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:41,588 INFO L264 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 39 conjunts are in the unsatisfiable core [2019-12-27 19:22:41,589 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:41,644 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 19:22:41,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:41,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-12-27 19:22:41,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1586542251] [2019-12-27 19:22:41,645 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:41,649 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:41,666 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 47 states and 50 transitions. [2019-12-27 19:22:41,666 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:41,667 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:41,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-12-27 19:22:41,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:41,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-12-27 19:22:41,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1115, Unknown=0, NotChecked=0, Total=1482 [2019-12-27 19:22:41,668 INFO L87 Difference]: Start difference. First operand 54 states and 110 transitions. Second operand 38 states. [2019-12-27 19:22:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:42,678 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2019-12-27 19:22:42,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:22:42,678 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2019-12-27 19:22:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:42,679 INFO L225 Difference]: With dead ends: 97 [2019-12-27 19:22:42,680 INFO L226 Difference]: Without dead ends: 94 [2019-12-27 19:22:42,680 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 19:22:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-12-27 19:22:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-12-27 19:22:42,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-12-27 19:22:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 190 transitions. [2019-12-27 19:22:42,683 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 190 transitions. Word has length 42 [2019-12-27 19:22:42,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:42,683 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 190 transitions. [2019-12-27 19:22:42,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-12-27 19:22:42,684 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 190 transitions. [2019-12-27 19:22:42,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 19:22:42,684 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:42,684 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:42,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:42,887 INFO L410 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:42,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:42,888 INFO L82 PathProgramCache]: Analyzing trace with hash -906112466, now seen corresponding path program 69 times [2019-12-27 19:22:42,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:42,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561337107] [2019-12-27 19:22:42,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:43,403 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 19:22:43,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561337107] [2019-12-27 19:22:43,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453016501] [2019-12-27 19:22:43,403 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 19:22:43,477 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-12-27 19:22:43,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:43,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 19:22:43,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:43,507 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 19:22:43,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:43,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 19:22:43,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [654445838] [2019-12-27 19:22:43,508 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:43,511 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:43,525 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 50 states and 55 transitions. [2019-12-27 19:22:43,525 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:43,528 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:43,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 19:22:43,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:43,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 19:22:43,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:22:43,529 INFO L87 Difference]: Start difference. First operand 94 states and 190 transitions. Second operand 39 states. [2019-12-27 19:22:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:44,588 INFO L93 Difference]: Finished difference Result 98 states and 198 transitions. [2019-12-27 19:22:44,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-12-27 19:22:44,588 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2019-12-27 19:22:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:44,589 INFO L225 Difference]: With dead ends: 98 [2019-12-27 19:22:44,589 INFO L226 Difference]: Without dead ends: 95 [2019-12-27 19:22:44,590 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 19:22:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-12-27 19:22:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 55. [2019-12-27 19:22:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-27 19:22:44,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 112 transitions. [2019-12-27 19:22:44,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 112 transitions. Word has length 43 [2019-12-27 19:22:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:44,592 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 112 transitions. [2019-12-27 19:22:44,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 19:22:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 112 transitions. [2019-12-27 19:22:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-12-27 19:22:44,593 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:44,593 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:44,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:44,794 INFO L410 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1404021454, now seen corresponding path program 70 times [2019-12-27 19:22:44,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:44,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263652574] [2019-12-27 19:22:44,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:45,256 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 19:22:45,256 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263652574] [2019-12-27 19:22:45,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267538670] [2019-12-27 19:22:45,257 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 19:22:45,312 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:22:45,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:45,313 INFO L264 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 40 conjunts are in the unsatisfiable core [2019-12-27 19:22:45,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:45,339 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 19:22:45,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:45,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-12-27 19:22:45,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2114850169] [2019-12-27 19:22:45,340 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:45,343 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:45,357 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 48 states and 51 transitions. [2019-12-27 19:22:45,357 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:45,358 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:45,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-12-27 19:22:45,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:45,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-12-27 19:22:45,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1174, Unknown=0, NotChecked=0, Total=1560 [2019-12-27 19:22:45,359 INFO L87 Difference]: Start difference. First operand 55 states and 112 transitions. Second operand 39 states. [2019-12-27 19:22:46,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:46,387 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2019-12-27 19:22:46,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:22:46,388 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2019-12-27 19:22:46,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:46,389 INFO L225 Difference]: With dead ends: 99 [2019-12-27 19:22:46,389 INFO L226 Difference]: Without dead ends: 96 [2019-12-27 19:22:46,390 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 19:22:46,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-12-27 19:22:46,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-12-27 19:22:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-12-27 19:22:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 194 transitions. [2019-12-27 19:22:46,392 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 194 transitions. Word has length 43 [2019-12-27 19:22:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:46,393 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 194 transitions. [2019-12-27 19:22:46,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-12-27 19:22:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 194 transitions. [2019-12-27 19:22:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 19:22:46,393 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:46,393 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:46,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:46,594 INFO L410 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:46,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1975284683, now seen corresponding path program 71 times [2019-12-27 19:22:46,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:46,596 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379014558] [2019-12-27 19:22:46,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:47,101 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 19:22:47,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379014558] [2019-12-27 19:22:47,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838555996] [2019-12-27 19:22:47,102 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 19:22:47,181 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-12-27 19:22:47,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:47,183 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-27 19:22:47,183 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:47,210 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 19:22:47,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:47,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 19:22:47,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [475445910] [2019-12-27 19:22:47,210 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:47,214 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:47,228 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 51 states and 56 transitions. [2019-12-27 19:22:47,228 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:47,229 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:47,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 19:22:47,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:47,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 19:22:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:22:47,230 INFO L87 Difference]: Start difference. First operand 96 states and 194 transitions. Second operand 40 states. [2019-12-27 19:22:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:48,354 INFO L93 Difference]: Finished difference Result 100 states and 202 transitions. [2019-12-27 19:22:48,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-12-27 19:22:48,354 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2019-12-27 19:22:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:48,355 INFO L225 Difference]: With dead ends: 100 [2019-12-27 19:22:48,355 INFO L226 Difference]: Without dead ends: 97 [2019-12-27 19:22:48,356 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 19:22:48,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-12-27 19:22:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 56. [2019-12-27 19:22:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-12-27 19:22:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 114 transitions. [2019-12-27 19:22:48,358 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 114 transitions. Word has length 44 [2019-12-27 19:22:48,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:48,358 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 114 transitions. [2019-12-27 19:22:48,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 19:22:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 114 transitions. [2019-12-27 19:22:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-12-27 19:22:48,361 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:48,361 INFO L411 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:48,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:48,564 INFO L410 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:48,565 INFO L82 PathProgramCache]: Analyzing trace with hash -574991809, now seen corresponding path program 72 times [2019-12-27 19:22:48,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:48,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859626085] [2019-12-27 19:22:48,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:49,117 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 19:22:49,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859626085] [2019-12-27 19:22:49,117 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757640320] [2019-12-27 19:22:49,118 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 19:22:49,199 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-12-27 19:22:49,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:49,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2019-12-27 19:22:49,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:49,254 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 19:22:49,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:49,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-12-27 19:22:49,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [360059850] [2019-12-27 19:22:49,255 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:49,259 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:49,277 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 49 states and 52 transitions. [2019-12-27 19:22:49,278 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:49,278 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:49,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-12-27 19:22:49,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-12-27 19:22:49,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1234, Unknown=0, NotChecked=0, Total=1640 [2019-12-27 19:22:49,279 INFO L87 Difference]: Start difference. First operand 56 states and 114 transitions. Second operand 40 states. [2019-12-27 19:22:50,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:50,825 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2019-12-27 19:22:50,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:22:50,825 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2019-12-27 19:22:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:50,827 INFO L225 Difference]: With dead ends: 101 [2019-12-27 19:22:50,827 INFO L226 Difference]: Without dead ends: 98 [2019-12-27 19:22:50,828 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1920, Invalid=4086, Unknown=0, NotChecked=0, Total=6006 [2019-12-27 19:22:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-12-27 19:22:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-12-27 19:22:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-12-27 19:22:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2019-12-27 19:22:50,831 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 44 [2019-12-27 19:22:50,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:50,831 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2019-12-27 19:22:50,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-12-27 19:22:50,831 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2019-12-27 19:22:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 19:22:50,832 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:50,832 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:51,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:51,036 INFO L410 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1104283334, now seen corresponding path program 73 times [2019-12-27 19:22:51,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:51,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898109808] [2019-12-27 19:22:51,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:51,648 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 19:22:51,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898109808] [2019-12-27 19:22:51,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964906960] [2019-12-27 19:22:51,649 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 19:22:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:51,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2019-12-27 19:22:51,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:51,763 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 19:22:51,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:51,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 19:22:51,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [12126504] [2019-12-27 19:22:51,764 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:51,770 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:51,811 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 52 states and 57 transitions. [2019-12-27 19:22:51,811 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:51,813 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:51,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 19:22:51,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:51,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 19:22:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:22:51,814 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand 41 states. [2019-12-27 19:22:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:52,978 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2019-12-27 19:22:52,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-12-27 19:22:52,979 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2019-12-27 19:22:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:52,980 INFO L225 Difference]: With dead ends: 102 [2019-12-27 19:22:52,980 INFO L226 Difference]: Without dead ends: 99 [2019-12-27 19:22:52,981 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1943, Invalid=4219, Unknown=0, NotChecked=0, Total=6162 [2019-12-27 19:22:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-12-27 19:22:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 57. [2019-12-27 19:22:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-12-27 19:22:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2019-12-27 19:22:52,983 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 45 [2019-12-27 19:22:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:52,984 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2019-12-27 19:22:52,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 19:22:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2019-12-27 19:22:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-27 19:22:52,984 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:52,984 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:53,186 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:53,186 INFO L410 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:53,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:53,187 INFO L82 PathProgramCache]: Analyzing trace with hash -644876838, now seen corresponding path program 74 times [2019-12-27 19:22:53,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:53,188 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541449494] [2019-12-27 19:22:53,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:53,696 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 19:22:53,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541449494] [2019-12-27 19:22:53,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588845410] [2019-12-27 19:22:53,697 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 19:22:53,758 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:22:53,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:53,760 INFO L264 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 19:22:53,760 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:53,788 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 19:22:53,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:53,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-12-27 19:22:53,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1901361944] [2019-12-27 19:22:53,789 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:53,794 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:53,812 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 50 states and 53 transitions. [2019-12-27 19:22:53,812 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:53,813 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:53,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-12-27 19:22:53,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:53,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-12-27 19:22:53,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2019-12-27 19:22:53,814 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand 41 states. [2019-12-27 19:22:54,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:54,971 INFO L93 Difference]: Finished difference Result 103 states and 208 transitions. [2019-12-27 19:22:54,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 19:22:54,972 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2019-12-27 19:22:54,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:54,973 INFO L225 Difference]: With dead ends: 103 [2019-12-27 19:22:54,973 INFO L226 Difference]: Without dead ends: 100 [2019-12-27 19:22:54,974 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 19:22:54,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-12-27 19:22:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-12-27 19:22:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-12-27 19:22:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 202 transitions. [2019-12-27 19:22:54,977 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 202 transitions. Word has length 45 [2019-12-27 19:22:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:54,977 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 202 transitions. [2019-12-27 19:22:54,977 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-12-27 19:22:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 202 transitions. [2019-12-27 19:22:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 19:22:54,978 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:54,978 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:55,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:55,179 INFO L410 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:55,179 INFO L82 PathProgramCache]: Analyzing trace with hash -126954957, now seen corresponding path program 75 times [2019-12-27 19:22:55,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:55,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549675789] [2019-12-27 19:22:55,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:55,730 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 19:22:55,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549675789] [2019-12-27 19:22:55,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119095277] [2019-12-27 19:22:55,731 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 19:22:55,813 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-27 19:22:55,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:55,815 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 19:22:55,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:55,845 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 19:22:55,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:55,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 19:22:55,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1049946392] [2019-12-27 19:22:55,845 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:55,849 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:55,865 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 53 states and 58 transitions. [2019-12-27 19:22:55,865 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:55,866 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:22:55,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 19:22:55,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:55,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 19:22:55,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:22:55,866 INFO L87 Difference]: Start difference. First operand 100 states and 202 transitions. Second operand 42 states. [2019-12-27 19:22:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:57,075 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2019-12-27 19:22:57,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-12-27 19:22:57,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2019-12-27 19:22:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:57,077 INFO L225 Difference]: With dead ends: 104 [2019-12-27 19:22:57,077 INFO L226 Difference]: Without dead ends: 101 [2019-12-27 19:22:57,078 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 19:22:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-12-27 19:22:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 58. [2019-12-27 19:22:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-27 19:22:57,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2019-12-27 19:22:57,081 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 46 [2019-12-27 19:22:57,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:57,081 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2019-12-27 19:22:57,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 19:22:57,081 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2019-12-27 19:22:57,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-12-27 19:22:57,081 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:57,081 INFO L411 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:57,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:57,282 INFO L410 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:57,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1483654807, now seen corresponding path program 76 times [2019-12-27 19:22:57,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:57,284 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281717863] [2019-12-27 19:22:57,284 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:57,821 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 19:22:57,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281717863] [2019-12-27 19:22:57,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966246427] [2019-12-27 19:22:57,821 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 19:22:57,886 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-27 19:22:57,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:22:57,887 INFO L264 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-12-27 19:22:57,888 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:22:57,914 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 19:22:57,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:22:57,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-12-27 19:22:57,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1733094292] [2019-12-27 19:22:57,915 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:22:57,919 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:22:57,937 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 51 states and 54 transitions. [2019-12-27 19:22:57,937 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:22:57,937 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:22:57,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-12-27 19:22:57,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:22:57,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-12-27 19:22:57,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1359, Unknown=0, NotChecked=0, Total=1806 [2019-12-27 19:22:57,939 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand 42 states. [2019-12-27 19:22:59,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:22:59,116 INFO L93 Difference]: Finished difference Result 105 states and 212 transitions. [2019-12-27 19:22:59,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:22:59,117 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 46 [2019-12-27 19:22:59,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:22:59,118 INFO L225 Difference]: With dead ends: 105 [2019-12-27 19:22:59,118 INFO L226 Difference]: Without dead ends: 102 [2019-12-27 19:22:59,119 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 19:22:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-12-27 19:22:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-12-27 19:22:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-12-27 19:22:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 206 transitions. [2019-12-27 19:22:59,121 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 206 transitions. Word has length 46 [2019-12-27 19:22:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:22:59,122 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 206 transitions. [2019-12-27 19:22:59,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-12-27 19:22:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 206 transitions. [2019-12-27 19:22:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 19:22:59,122 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:22:59,122 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:22:59,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:22:59,326 INFO L410 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:22:59,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:22:59,326 INFO L82 PathProgramCache]: Analyzing trace with hash 359363934, now seen corresponding path program 77 times [2019-12-27 19:22:59,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:22:59,327 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665143330] [2019-12-27 19:22:59,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:22:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:22:59,931 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 19:22:59,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665143330] [2019-12-27 19:22:59,932 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448722282] [2019-12-27 19:22:59,932 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 19:23:00,006 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-12-27 19:23:00,007 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:23:00,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 44 conjunts are in the unsatisfiable core [2019-12-27 19:23:00,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:23:00,035 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 19:23:00,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:23:00,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 19:23:00,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [163011341] [2019-12-27 19:23:00,036 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:23:00,040 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:23:00,057 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 54 states and 59 transitions. [2019-12-27 19:23:00,058 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:23:00,059 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:23:00,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 19:23:00,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:23:00,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 19:23:00,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:23:00,060 INFO L87 Difference]: Start difference. First operand 102 states and 206 transitions. Second operand 43 states. [2019-12-27 19:23:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:23:01,593 INFO L93 Difference]: Finished difference Result 106 states and 214 transitions. [2019-12-27 19:23:01,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-12-27 19:23:01,594 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2019-12-27 19:23:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:23:01,595 INFO L225 Difference]: With dead ends: 106 [2019-12-27 19:23:01,595 INFO L226 Difference]: Without dead ends: 103 [2019-12-27 19:23:01,596 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2145, Invalid=4661, Unknown=0, NotChecked=0, Total=6806 [2019-12-27 19:23:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-12-27 19:23:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 59. [2019-12-27 19:23:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-12-27 19:23:01,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 120 transitions. [2019-12-27 19:23:01,598 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 120 transitions. Word has length 47 [2019-12-27 19:23:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:23:01,598 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 120 transitions. [2019-12-27 19:23:01,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 19:23:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 120 transitions. [2019-12-27 19:23:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-12-27 19:23:01,599 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:23:01,599 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:23:01,799 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:23:01,800 INFO L410 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:23:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:23:01,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1251341182, now seen corresponding path program 78 times [2019-12-27 19:23:01,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:23:01,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286392249] [2019-12-27 19:23:01,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:23:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:23:02,349 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 19:23:02,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286392249] [2019-12-27 19:23:02,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607321361] [2019-12-27 19:23:02,350 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 19:23:02,436 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-12-27 19:23:02,436 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:23:02,438 INFO L264 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 45 conjunts are in the unsatisfiable core [2019-12-27 19:23:02,439 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:23:02,467 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 19:23:02,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-27 19:23:02,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-12-27 19:23:02,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [976129380] [2019-12-27 19:23:02,468 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:23:02,471 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:23:02,488 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 52 states and 55 transitions. [2019-12-27 19:23:02,488 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:23:02,489 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 1 times. [2019-12-27 19:23:02,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-12-27 19:23:02,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:23:02,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-12-27 19:23:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=1424, Unknown=0, NotChecked=0, Total=1892 [2019-12-27 19:23:02,489 INFO L87 Difference]: Start difference. First operand 59 states and 120 transitions. Second operand 43 states. [2019-12-27 19:23:03,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:23:03,740 INFO L93 Difference]: Finished difference Result 107 states and 216 transitions. [2019-12-27 19:23:03,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-12-27 19:23:03,741 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 47 [2019-12-27 19:23:03,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:23:03,742 INFO L225 Difference]: With dead ends: 107 [2019-12-27 19:23:03,742 INFO L226 Difference]: Without dead ends: 104 [2019-12-27 19:23:03,743 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 19:23:03,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-12-27 19:23:03,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-12-27 19:23:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-12-27 19:23:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2019-12-27 19:23:03,746 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 47 [2019-12-27 19:23:03,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:23:03,746 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2019-12-27 19:23:03,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-12-27 19:23:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2019-12-27 19:23:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 19:23:03,746 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:23:03,746 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:23:03,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:23:03,947 INFO L410 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:23:03,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:23:03,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1744619877, now seen corresponding path program 79 times [2019-12-27 19:23:03,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:23:03,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062945766] [2019-12-27 19:23:03,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:23:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:23:04,410 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 19:23:04,410 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062945766] [2019-12-27 19:23:04,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247498658] [2019-12-27 19:23:04,411 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 19:23:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:23:04,489 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 19:23:04,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:23:04,516 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 19:23:04,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 19:23:04,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 24 [2019-12-27 19:23:04,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1073296652] [2019-12-27 19:23:04,520 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:23:04,526 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:23:04,553 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 55 states and 60 transitions. [2019-12-27 19:23:04,553 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:23:04,555 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 4 times. [2019-12-27 19:23:04,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 19:23:04,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:23:04,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 19:23:04,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2019-12-27 19:23:04,555 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand 23 states. [2019-12-27 19:23:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:23:04,617 INFO L93 Difference]: Finished difference Result 921 states and 1757 transitions. [2019-12-27 19:23:04,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:23:04,617 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-27 19:23:04,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:23:04,618 INFO L225 Difference]: With dead ends: 921 [2019-12-27 19:23:04,618 INFO L226 Difference]: Without dead ends: 60 [2019-12-27 19:23:04,618 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 19:23:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-27 19:23:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-12-27 19:23:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-12-27 19:23:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 94 transitions. [2019-12-27 19:23:04,620 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 94 transitions. Word has length 48 [2019-12-27 19:23:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:23:04,620 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 94 transitions. [2019-12-27 19:23:04,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 19:23:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 94 transitions. [2019-12-27 19:23:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-12-27 19:23:04,621 INFO L403 BasicCegarLoop]: Found error trace [2019-12-27 19:23:04,621 INFO L411 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1] [2019-12-27 19:23:04,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:23:04,824 INFO L410 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-27 19:23:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-27 19:23:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash -136870673, now seen corresponding path program 80 times [2019-12-27 19:23:04,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-27 19:23:04,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112921219] [2019-12-27 19:23:04,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-27 19:23:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-27 19:23:05,540 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 19:23:05,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112921219] [2019-12-27 19:23:05,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528851816] [2019-12-27 19:23:05,540 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 19:23:05,609 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-27 19:23:05,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-27 19:23:05,610 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 22 conjunts are in the unsatisfiable core [2019-12-27 19:23:05,611 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-27 19:23:06,268 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 19:23:06,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-27 19:23:06,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [42] total 65 [2019-12-27 19:23:06,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1002596741] [2019-12-27 19:23:06,269 INFO L132 pAbStrategyModuleMcr]: Constructing automaton for MCR equivalence class. [2019-12-27 19:23:06,273 INFO L197 pAbStrategyModuleMcr]: Started intersection. [2019-12-27 19:23:06,291 INFO L208 pAbStrategyModuleMcr]: Finished intersection with 53 states and 56 transitions. [2019-12-27 19:23:06,291 INFO L219 pAbStrategyModuleMcr]: Constructing interpolant automaton by labelling MCR automaton. [2019-12-27 19:23:06,292 INFO L288 pAbStrategyModuleMcr]: Construction finished. Needed to calculate wp 2 times. [2019-12-27 19:23:06,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-27 19:23:06,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-27 19:23:06,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-27 19:23:06,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=3422, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 19:23:06,293 INFO L87 Difference]: Start difference. First operand 60 states and 94 transitions. Second operand 23 states. [2019-12-27 19:23:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-27 19:23:06,342 INFO L93 Difference]: Finished difference Result 451 states and 644 transitions. [2019-12-27 19:23:06,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-12-27 19:23:06,342 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 48 [2019-12-27 19:23:06,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-27 19:23:06,343 INFO L225 Difference]: With dead ends: 451 [2019-12-27 19:23:06,343 INFO L226 Difference]: Without dead ends: 0 [2019-12-27 19:23:06,343 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=738, Invalid=3422, Unknown=0, NotChecked=0, Total=4160 [2019-12-27 19:23:06,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-27 19:23:06,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-27 19:23:06,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-27 19:23:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-27 19:23:06,344 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2019-12-27 19:23:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-27 19:23:06,344 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-27 19:23:06,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-27 19:23:06,344 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-27 19:23:06,344 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-27 19:23:06,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-27 19:23:06,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 07:23:06 BasicIcfg [2019-12-27 19:23:06,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-27 19:23:06,551 INFO L168 Benchmark]: Toolchain (without parser) took 97633.70 ms. Allocated memory was 137.4 MB in the beginning and 617.6 MB in the end (delta: 480.2 MB). Free memory was 100.1 MB in the beginning and 441.1 MB in the end (delta: -341.1 MB). Peak memory consumption was 139.2 MB. Max. memory is 7.1 GB. [2019-12-27 19:23:06,551 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2019-12-27 19:23:06,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 612.45 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 160.7 MB in the end (delta: -61.0 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2019-12-27 19:23:06,552 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.29 ms. Allocated memory is still 200.8 MB. Free memory was 160.7 MB in the beginning and 158.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-12-27 19:23:06,552 INFO L168 Benchmark]: Boogie Preprocessor took 28.95 ms. Allocated memory is still 200.8 MB. Free memory was 158.3 MB in the beginning and 156.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-12-27 19:23:06,553 INFO L168 Benchmark]: RCFGBuilder took 470.76 ms. Allocated memory is still 200.8 MB. Free memory was 156.3 MB in the beginning and 137.2 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. [2019-12-27 19:23:06,553 INFO L168 Benchmark]: TraceAbstraction took 96469.29 ms. Allocated memory was 200.8 MB in the beginning and 617.6 MB in the end (delta: 416.8 MB). Free memory was 136.5 MB in the beginning and 441.1 MB in the end (delta: -304.6 MB). Peak memory consumption was 112.2 MB. Max. memory is 7.1 GB. [2019-12-27 19:23:06,555 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.4 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 612.45 ms. Allocated memory was 137.4 MB in the beginning and 200.8 MB in the end (delta: 63.4 MB). Free memory was 99.7 MB in the beginning and 160.7 MB in the end (delta: -61.0 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 47.29 ms. Allocated memory is still 200.8 MB. Free memory was 160.7 MB in the beginning and 158.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.95 ms. Allocated memory is still 200.8 MB. Free memory was 158.3 MB in the beginning and 156.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 470.76 ms. Allocated memory is still 200.8 MB. Free memory was 156.3 MB in the beginning and 137.2 MB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 96469.29 ms. Allocated memory was 200.8 MB in the beginning and 617.6 MB in the end (delta: 416.8 MB). Free memory was 136.5 MB in the beginning and 441.1 MB in the end (delta: -304.6 MB). Peak memory consumption was 112.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.4s, 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, 0 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: 96.3s, OverallIterations: 82, TraceHistogramMax: 21, AutomataDifference: 45.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 901 SDtfs, 2663 SDslu, 3391 SDs, 0 SdLazy, 5096 SolverSat, 5578 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5691 GetRequests, 2213 SyntacticMatches, 0 SemanticMatches, 3478 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36013 ImplicationChecksByTransitivity, 59.0s 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: 0.8s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 24.8s InterpolantComputationTime, 4554 NumberOfCodeBlocks, 4554 NumberOfCodeBlocksAsserted, 579 NumberOfCheckSat, 4394 ConstructedInterpolants, 0 QuantifiedInterpolants, 446468 SizeOfPredicates, 1558 NumberOfNonLiveVariables, 13572 ConjunctsInSsa, 1990 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...