/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-16 01:44:11,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-16 01:44:11,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-16 01:44:11,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-16 01:44:11,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-16 01:44:11,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-16 01:44:11,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-16 01:44:11,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-16 01:44:11,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-16 01:44:11,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-16 01:44:11,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-16 01:44:11,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-16 01:44:11,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-16 01:44:11,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-16 01:44:11,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-16 01:44:11,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-16 01:44:11,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-16 01:44:11,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-16 01:44:11,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-16 01:44:11,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-16 01:44:11,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-16 01:44:11,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-16 01:44:12,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-16 01:44:12,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-16 01:44:12,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-16 01:44:12,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-16 01:44:12,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-16 01:44:12,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-16 01:44:12,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-16 01:44:12,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-16 01:44:12,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-16 01:44:12,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-16 01:44:12,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-16 01:44:12,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-16 01:44:12,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-16 01:44:12,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-16 01:44:12,016 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-16 01:44:12,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-16 01:44:12,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-16 01:44:12,045 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-16 01:44:12,045 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-16 01:44:12,046 INFO L138 SettingsManager]: * Use SBE=true [2020-09-16 01:44:12,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-16 01:44:12,046 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-16 01:44:12,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-16 01:44:12,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-16 01:44:12,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-16 01:44:12,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-16 01:44:12,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-16 01:44:12,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-16 01:44:12,047 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-16 01:44:12,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-16 01:44:12,048 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-16 01:44:12,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-16 01:44:12,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-16 01:44:12,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-16 01:44:12,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-16 01:44:12,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-16 01:44:12,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-16 01:44:12,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-16 01:44:12,050 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-16 01:44:12,050 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-16 01:44:12,050 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-16 01:44:12,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-16 01:44:12,051 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-16 01:44:12,051 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-16 01:44:12,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-16 01:44:12,051 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-16 01:44:12,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-16 01:44:12,516 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-16 01:44:12,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-16 01:44:12,526 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-16 01:44:12,527 INFO L275 PluginConnector]: CDTParser initialized [2020-09-16 01:44:12,530 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-2.i [2020-09-16 01:44:12,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/292861d4e/22b03013f6204b63965b10445d26dcfd/FLAG15f8e0e85 [2020-09-16 01:44:13,377 INFO L306 CDTParser]: Found 1 translation units. [2020-09-16 01:44:13,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-nondet/nondet-array-2.i [2020-09-16 01:44:13,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/292861d4e/22b03013f6204b63965b10445d26dcfd/FLAG15f8e0e85 [2020-09-16 01:44:13,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/292861d4e/22b03013f6204b63965b10445d26dcfd [2020-09-16 01:44:13,598 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-16 01:44:13,606 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-16 01:44:13,608 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-16 01:44:13,609 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-16 01:44:13,614 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-16 01:44:13,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:44:13" (1/1) ... [2020-09-16 01:44:13,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cfe94dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:13, skipping insertion in model container [2020-09-16 01:44:13,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 01:44:13" (1/1) ... [2020-09-16 01:44:13,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-16 01:44:13,711 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-16 01:44:14,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 01:44:14,347 INFO L203 MainTranslator]: Completed pre-run [2020-09-16 01:44:14,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-16 01:44:14,509 INFO L208 MainTranslator]: Completed translation [2020-09-16 01:44:14,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14 WrapperNode [2020-09-16 01:44:14,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-16 01:44:14,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-16 01:44:14,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-16 01:44:14,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-16 01:44:14,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,547 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,577 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-16 01:44:14,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-16 01:44:14,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-16 01:44:14,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-16 01:44:14,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... [2020-09-16 01:44:14,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-16 01:44:14,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-16 01:44:14,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-16 01:44:14,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-16 01:44:14,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:14,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-09-16 01:44:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-16 01:44:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-16 01:44:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-09-16 01:44:14,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-09-16 01:44:14,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-16 01:44:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-16 01:44:14,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-16 01:44:14,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-16 01:44:14,721 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-16 01:44:15,139 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-16 01:44:15,140 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-16 01:44:15,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:44:15 BoogieIcfgContainer [2020-09-16 01:44:15,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-16 01:44:15,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-16 01:44:15,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-16 01:44:15,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-16 01:44:15,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 01:44:13" (1/3) ... [2020-09-16 01:44:15,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d7e350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:44:15, skipping insertion in model container [2020-09-16 01:44:15,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 01:44:14" (2/3) ... [2020-09-16 01:44:15,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d7e350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 01:44:15, skipping insertion in model container [2020-09-16 01:44:15,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 01:44:15" (3/3) ... [2020-09-16 01:44:15,156 INFO L109 eAbstractionObserver]: Analyzing ICFG nondet-array-2.i [2020-09-16 01:44:15,169 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-16 01:44:15,170 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-16 01:44:15,180 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-16 01:44:15,181 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-16 01:44:15,211 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,211 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,212 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,212 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,212 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,213 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,213 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,218 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,219 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,219 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,219 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,219 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:15,257 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-16 01:44:15,287 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:44:15,287 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:44:15,287 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:44:15,288 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:44:15,288 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:44:15,288 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:44:15,288 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:44:15,288 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:44:15,307 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 71 transitions, 150 flow [2020-09-16 01:44:15,310 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-09-16 01:44:15,370 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-09-16 01:44:15,371 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-16 01:44:15,376 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 103 events. 12/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2020-09-16 01:44:15,379 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-09-16 01:44:15,410 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-09-16 01:44:15,411 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-16 01:44:15,412 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 103 events. 12/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2020-09-16 01:44:15,413 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 370 [2020-09-16 01:44:15,415 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:44:16,957 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-09-16 01:44:17,275 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-16 01:44:17,469 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-09-16 01:44:17,559 INFO L206 etLargeBlockEncoding]: Checked pairs total: 264 [2020-09-16 01:44:17,559 INFO L214 etLargeBlockEncoding]: Total number of compositions: 66 [2020-09-16 01:44:17,564 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 14 transitions, 36 flow [2020-09-16 01:44:17,577 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 27 states. [2020-09-16 01:44:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-16 01:44:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-16 01:44:17,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:17,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-16 01:44:17,591 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:17,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:17,599 INFO L82 PathProgramCache]: Analyzing trace with hash 8680406, now seen corresponding path program 1 times [2020-09-16 01:44:17,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:17,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009181277] [2020-09-16 01:44:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:17,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009181277] [2020-09-16 01:44:17,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:44:17,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 01:44:17,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1828751071] [2020-09-16 01:44:17,851 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:17,854 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:17,868 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-16 01:44:17,869 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:17,872 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:17,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:17,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:17,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:17,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:17,893 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-09-16 01:44:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:17,944 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-09-16 01:44:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:17,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-16 01:44:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:17,960 INFO L225 Difference]: With dead ends: 27 [2020-09-16 01:44:17,961 INFO L226 Difference]: Without dead ends: 23 [2020-09-16 01:44:17,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-16 01:44:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-16 01:44:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-16 01:44:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2020-09-16 01:44:18,010 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 4 [2020-09-16 01:44:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:18,010 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2020-09-16 01:44:18,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2020-09-16 01:44:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-16 01:44:18,011 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:18,012 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-09-16 01:44:18,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-16 01:44:18,012 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -256835414, now seen corresponding path program 1 times [2020-09-16 01:44:18,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:18,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817819626] [2020-09-16 01:44:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:18,050 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:18,072 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:18,102 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-16 01:44:18,103 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-16 01:44:18,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-16 01:44:18,105 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-16 01:44:18,106 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-16 01:44:18,107 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-09-16 01:44:18,114 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,114 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,115 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,115 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,115 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,115 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,115 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,116 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,116 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,116 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,116 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,117 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,117 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,117 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,118 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,118 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,118 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,119 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,119 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,122 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,123 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,123 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,123 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,123 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:18,129 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-16 01:44:18,129 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:44:18,130 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:44:18,130 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:44:18,130 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:44:18,130 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:44:18,130 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:44:18,130 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:44:18,131 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:44:18,133 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 78 transitions, 174 flow [2020-09-16 01:44:18,133 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-09-16 01:44:18,169 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-09-16 01:44:18,169 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-09-16 01:44:18,171 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 183 events. 23/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2020-09-16 01:44:18,174 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-09-16 01:44:18,203 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-09-16 01:44:18,203 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-09-16 01:44:18,204 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 183 events. 23/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2020-09-16 01:44:18,207 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 900 [2020-09-16 01:44:18,207 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:44:19,562 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-09-16 01:44:19,891 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-09-16 01:44:20,007 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-09-16 01:44:20,192 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-09-16 01:44:20,282 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1723 [2020-09-16 01:44:20,283 INFO L214 etLargeBlockEncoding]: Total number of compositions: 62 [2020-09-16 01:44:20,283 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 23 transitions, 64 flow [2020-09-16 01:44:20,295 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 242 states. [2020-09-16 01:44:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states. [2020-09-16 01:44:20,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-16 01:44:20,296 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:20,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-16 01:44:20,297 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:20,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:20,297 INFO L82 PathProgramCache]: Analyzing trace with hash 13452069, now seen corresponding path program 1 times [2020-09-16 01:44:20,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:20,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952666518] [2020-09-16 01:44:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:20,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952666518] [2020-09-16 01:44:20,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:44:20,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 01:44:20,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1876479441] [2020-09-16 01:44:20,358 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:20,359 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:20,362 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-16 01:44:20,363 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:20,363 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:20,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:20,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:20,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:20,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:20,367 INFO L87 Difference]: Start difference. First operand 242 states. Second operand 3 states. [2020-09-16 01:44:20,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:20,419 INFO L93 Difference]: Finished difference Result 242 states and 550 transitions. [2020-09-16 01:44:20,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:20,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-16 01:44:20,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:20,431 INFO L225 Difference]: With dead ends: 242 [2020-09-16 01:44:20,432 INFO L226 Difference]: Without dead ends: 216 [2020-09-16 01:44:20,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:20,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-16 01:44:20,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-09-16 01:44:20,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-16 01:44:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 494 transitions. [2020-09-16 01:44:20,465 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 494 transitions. Word has length 4 [2020-09-16 01:44:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:20,465 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 494 transitions. [2020-09-16 01:44:20,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 494 transitions. [2020-09-16 01:44:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 01:44:20,466 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:20,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:20,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-16 01:44:20,467 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:20,468 INFO L82 PathProgramCache]: Analyzing trace with hash 76722491, now seen corresponding path program 1 times [2020-09-16 01:44:20,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:20,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315126576] [2020-09-16 01:44:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:20,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315126576] [2020-09-16 01:44:20,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180326766] [2020-09-16 01:44:20,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:20,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-16 01:44:20,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:20,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 01:44:20,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2020-09-16 01:44:20,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [441282897] [2020-09-16 01:44:20,650 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:20,651 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:20,652 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-16 01:44:20,653 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:20,653 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:20,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:20,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:20,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:20,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:44:20,654 INFO L87 Difference]: Start difference. First operand 216 states and 494 transitions. Second operand 3 states. [2020-09-16 01:44:20,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:20,677 INFO L93 Difference]: Finished difference Result 241 states and 549 transitions. [2020-09-16 01:44:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:20,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-16 01:44:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:20,681 INFO L225 Difference]: With dead ends: 241 [2020-09-16 01:44:20,681 INFO L226 Difference]: Without dead ends: 241 [2020-09-16 01:44:20,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:44:20,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-16 01:44:20,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-09-16 01:44:20,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-09-16 01:44:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 549 transitions. [2020-09-16 01:44:20,706 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 549 transitions. Word has length 8 [2020-09-16 01:44:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:20,706 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 549 transitions. [2020-09-16 01:44:20,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 549 transitions. [2020-09-16 01:44:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 01:44:20,708 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:20,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:20,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:44:20,923 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:20,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1916569557, now seen corresponding path program 1 times [2020-09-16 01:44:20,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:20,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44323484] [2020-09-16 01:44:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:21,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44323484] [2020-09-16 01:44:21,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209978740] [2020-09-16 01:44:21,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:21,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-16 01:44:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:21,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:44:21,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-16 01:44:21,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1512532340] [2020-09-16 01:44:21,120 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:21,121 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:21,123 INFO L274 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2020-09-16 01:44:21,123 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:21,123 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:21,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 01:44:21,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:21,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 01:44:21,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:44:21,125 INFO L87 Difference]: Start difference. First operand 241 states and 549 transitions. Second operand 6 states. [2020-09-16 01:44:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:21,167 INFO L93 Difference]: Finished difference Result 241 states and 545 transitions. [2020-09-16 01:44:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:44:21,167 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-09-16 01:44:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:21,170 INFO L225 Difference]: With dead ends: 241 [2020-09-16 01:44:21,171 INFO L226 Difference]: Without dead ends: 241 [2020-09-16 01:44:21,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:44:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-09-16 01:44:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-09-16 01:44:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-09-16 01:44:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 545 transitions. [2020-09-16 01:44:21,192 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 545 transitions. Word has length 9 [2020-09-16 01:44:21,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:21,192 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 545 transitions. [2020-09-16 01:44:21,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 01:44:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 545 transitions. [2020-09-16 01:44:21,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-16 01:44:21,194 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:21,194 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-09-16 01:44:21,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:44:21,409 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:21,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:21,410 INFO L82 PathProgramCache]: Analyzing trace with hash 94633273, now seen corresponding path program 1 times [2020-09-16 01:44:21,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:21,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628485409] [2020-09-16 01:44:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:21,456 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:21,491 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:21,498 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-16 01:44:21,498 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-16 01:44:21,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-16 01:44:21,499 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-16 01:44:21,499 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-16 01:44:21,501 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-09-16 01:44:21,508 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,508 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,508 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,509 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,509 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,509 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,509 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,509 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,510 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,510 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,510 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,510 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,510 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,511 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,511 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,511 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,511 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,511 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,512 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,512 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,512 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,512 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,513 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,513 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,513 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,513 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,515 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,515 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,516 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,516 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,516 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,518 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,518 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,518 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,518 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,518 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:21,523 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-16 01:44:21,524 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:44:21,524 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:44:21,524 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:44:21,524 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:44:21,524 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:44:21,525 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:44:21,525 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:44:21,525 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:44:21,527 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 85 transitions, 200 flow [2020-09-16 01:44:21,527 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-09-16 01:44:21,573 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-09-16 01:44:21,573 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-09-16 01:44:21,575 INFO L80 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 330 events. 45/330 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1086 event pairs, 1 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 191. Up to 16 conditions per place. [2020-09-16 01:44:21,580 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-09-16 01:44:21,628 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-09-16 01:44:21,629 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-09-16 01:44:21,631 INFO L80 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 330 events. 45/330 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1086 event pairs, 1 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 191. Up to 16 conditions per place. [2020-09-16 01:44:21,635 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1470 [2020-09-16 01:44:21,636 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:44:22,917 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2020-09-16 01:44:23,128 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-16 01:44:23,249 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3028 [2020-09-16 01:44:23,249 INFO L214 etLargeBlockEncoding]: Total number of compositions: 68 [2020-09-16 01:44:23,250 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 86 flow [2020-09-16 01:44:23,304 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1150 states. [2020-09-16 01:44:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states. [2020-09-16 01:44:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-16 01:44:23,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:23,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-16 01:44:23,305 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:23,306 INFO L82 PathProgramCache]: Analyzing trace with hash 18528206, now seen corresponding path program 1 times [2020-09-16 01:44:23,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:23,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127063991] [2020-09-16 01:44:23,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:23,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127063991] [2020-09-16 01:44:23,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:44:23,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 01:44:23,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2076799823] [2020-09-16 01:44:23,340 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:23,341 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:23,342 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-16 01:44:23,342 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:23,342 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:23,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:23,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:23,344 INFO L87 Difference]: Start difference. First operand 1150 states. Second operand 3 states. [2020-09-16 01:44:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:23,390 INFO L93 Difference]: Finished difference Result 1150 states and 3360 transitions. [2020-09-16 01:44:23,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:23,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-16 01:44:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:23,402 INFO L225 Difference]: With dead ends: 1150 [2020-09-16 01:44:23,403 INFO L226 Difference]: Without dead ends: 1024 [2020-09-16 01:44:23,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-16 01:44:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2020-09-16 01:44:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-09-16 01:44:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3009 transitions. [2020-09-16 01:44:23,458 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3009 transitions. Word has length 4 [2020-09-16 01:44:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:23,458 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 3009 transitions. [2020-09-16 01:44:23,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3009 transitions. [2020-09-16 01:44:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 01:44:23,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:23,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:23,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-16 01:44:23,462 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:23,463 INFO L82 PathProgramCache]: Analyzing trace with hash 949696130, now seen corresponding path program 1 times [2020-09-16 01:44:23,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:23,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777013898] [2020-09-16 01:44:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:23,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777013898] [2020-09-16 01:44:23,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889474859] [2020-09-16 01:44:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:23,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-16 01:44:23,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:23,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:23,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 01:44:23,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2020-09-16 01:44:23,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1219378208] [2020-09-16 01:44:23,612 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:23,613 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:23,614 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-16 01:44:23,614 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:23,615 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:23,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:23,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:44:23,616 INFO L87 Difference]: Start difference. First operand 1024 states and 3009 transitions. Second operand 3 states. [2020-09-16 01:44:23,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:23,642 INFO L93 Difference]: Finished difference Result 1149 states and 3359 transitions. [2020-09-16 01:44:23,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:23,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-16 01:44:23,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:23,652 INFO L225 Difference]: With dead ends: 1149 [2020-09-16 01:44:23,652 INFO L226 Difference]: Without dead ends: 1149 [2020-09-16 01:44:23,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:44:23,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-09-16 01:44:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2020-09-16 01:44:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1149 states. [2020-09-16 01:44:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3359 transitions. [2020-09-16 01:44:23,694 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3359 transitions. Word has length 8 [2020-09-16 01:44:23,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:23,695 INFO L479 AbstractCegarLoop]: Abstraction has 1149 states and 3359 transitions. [2020-09-16 01:44:23,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3359 transitions. [2020-09-16 01:44:23,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 01:44:23,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:23,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:23,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:44:23,905 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:23,905 INFO L82 PathProgramCache]: Analyzing trace with hash -624190544, now seen corresponding path program 1 times [2020-09-16 01:44:23,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:23,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430232896] [2020-09-16 01:44:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:23,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430232896] [2020-09-16 01:44:23,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945499861] [2020-09-16 01:44:23,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-16 01:44:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:24,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:44:24,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-16 01:44:24,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1457840486] [2020-09-16 01:44:24,094 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:24,095 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:24,097 INFO L274 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2020-09-16 01:44:24,097 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:24,098 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:24,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 01:44:24,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:24,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 01:44:24,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:44:24,099 INFO L87 Difference]: Start difference. First operand 1149 states and 3359 transitions. Second operand 6 states. [2020-09-16 01:44:24,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:24,149 INFO L93 Difference]: Finished difference Result 1149 states and 3355 transitions. [2020-09-16 01:44:24,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:44:24,150 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-09-16 01:44:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:24,159 INFO L225 Difference]: With dead ends: 1149 [2020-09-16 01:44:24,160 INFO L226 Difference]: Without dead ends: 1149 [2020-09-16 01:44:24,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:44:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2020-09-16 01:44:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2020-09-16 01:44:24,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1149 states. [2020-09-16 01:44:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3355 transitions. [2020-09-16 01:44:24,241 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3355 transitions. Word has length 9 [2020-09-16 01:44:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:24,241 INFO L479 AbstractCegarLoop]: Abstraction has 1149 states and 3355 transitions. [2020-09-16 01:44:24,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 01:44:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3355 transitions. [2020-09-16 01:44:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 01:44:24,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:24,243 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:24,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:44:24,458 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:24,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:24,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1107793731, now seen corresponding path program 1 times [2020-09-16 01:44:24,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:24,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545920810] [2020-09-16 01:44:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-16 01:44:24,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545920810] [2020-09-16 01:44:24,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:44:24,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 01:44:24,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1825492770] [2020-09-16 01:44:24,509 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:24,510 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:24,512 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 13 transitions. [2020-09-16 01:44:24,512 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:24,513 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:24,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 01:44:24,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:24,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 01:44:24,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:44:24,514 INFO L87 Difference]: Start difference. First operand 1149 states and 3355 transitions. Second operand 4 states. [2020-09-16 01:44:24,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:24,563 INFO L93 Difference]: Finished difference Result 1005 states and 2767 transitions. [2020-09-16 01:44:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:44:24,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-09-16 01:44:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:24,571 INFO L225 Difference]: With dead ends: 1005 [2020-09-16 01:44:24,571 INFO L226 Difference]: Without dead ends: 1005 [2020-09-16 01:44:24,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:44:24,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-09-16 01:44:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 973. [2020-09-16 01:44:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2020-09-16 01:44:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 2707 transitions. [2020-09-16 01:44:24,607 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 2707 transitions. Word has length 13 [2020-09-16 01:44:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:24,609 INFO L479 AbstractCegarLoop]: Abstraction has 973 states and 2707 transitions. [2020-09-16 01:44:24,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 01:44:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 2707 transitions. [2020-09-16 01:44:24,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-16 01:44:24,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:24,615 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2020-09-16 01:44:24,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-16 01:44:24,616 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:24,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:24,616 INFO L82 PathProgramCache]: Analyzing trace with hash -515475845, now seen corresponding path program 1 times [2020-09-16 01:44:24,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:24,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577119479] [2020-09-16 01:44:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:24,647 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:24,666 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:24,682 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-16 01:44:24,682 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-16 01:44:24,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-16 01:44:24,683 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-16 01:44:24,683 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-16 01:44:24,684 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-09-16 01:44:24,698 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,699 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,699 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,699 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,699 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,699 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,700 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,700 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,700 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,700 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,700 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,701 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,701 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,701 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,701 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,702 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,702 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,702 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,702 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,702 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,703 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,703 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,703 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,703 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,704 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,704 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,704 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,705 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,705 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,705 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,706 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,706 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,708 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,708 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,708 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,709 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,709 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,711 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,711 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,711 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,711 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,711 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,713 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,714 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,714 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,714 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,714 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:24,718 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-16 01:44:24,719 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:44:24,719 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:44:24,719 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:44:24,719 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:44:24,719 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:44:24,720 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:44:24,720 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:44:24,720 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:44:24,721 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 92 transitions, 228 flow [2020-09-16 01:44:24,722 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-09-16 01:44:24,800 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-09-16 01:44:24,800 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-09-16 01:44:24,803 INFO L80 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 613 events. 91/613 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2732 event pairs, 6 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 350. Up to 32 conditions per place. [2020-09-16 01:44:24,817 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-09-16 01:44:24,881 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-09-16 01:44:24,881 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-09-16 01:44:24,884 INFO L80 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 613 events. 91/613 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2732 event pairs, 6 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 350. Up to 32 conditions per place. [2020-09-16 01:44:24,895 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2120 [2020-09-16 01:44:24,895 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:44:26,385 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-16 01:44:26,513 INFO L206 etLargeBlockEncoding]: Checked pairs total: 4448 [2020-09-16 01:44:26,513 INFO L214 etLargeBlockEncoding]: Total number of compositions: 68 [2020-09-16 01:44:26,513 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 110 flow [2020-09-16 01:44:26,847 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 5482 states. [2020-09-16 01:44:26,848 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states. [2020-09-16 01:44:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-16 01:44:26,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:26,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-16 01:44:26,849 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash 23824947, now seen corresponding path program 1 times [2020-09-16 01:44:26,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:26,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863082313] [2020-09-16 01:44:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:26,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863082313] [2020-09-16 01:44:26,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:44:26,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 01:44:26,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1915597460] [2020-09-16 01:44:26,876 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:26,877 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:26,878 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-16 01:44:26,878 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:26,878 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:26,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:26,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:26,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:26,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:26,879 INFO L87 Difference]: Start difference. First operand 5482 states. Second operand 3 states. [2020-09-16 01:44:27,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:27,031 INFO L93 Difference]: Finished difference Result 5482 states and 19554 transitions. [2020-09-16 01:44:27,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:27,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-16 01:44:27,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:27,085 INFO L225 Difference]: With dead ends: 5482 [2020-09-16 01:44:27,085 INFO L226 Difference]: Without dead ends: 4856 [2020-09-16 01:44:27,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:27,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-09-16 01:44:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2020-09-16 01:44:27,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-09-16 01:44:27,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 17428 transitions. [2020-09-16 01:44:27,309 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 17428 transitions. Word has length 4 [2020-09-16 01:44:27,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:27,310 INFO L479 AbstractCegarLoop]: Abstraction has 4856 states and 17428 transitions. [2020-09-16 01:44:27,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 17428 transitions. [2020-09-16 01:44:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 01:44:27,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:27,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:27,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-16 01:44:27,311 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:27,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1205655351, now seen corresponding path program 1 times [2020-09-16 01:44:27,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:27,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451901725] [2020-09-16 01:44:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:27,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:27,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451901725] [2020-09-16 01:44:27,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894707133] [2020-09-16 01:44:27,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:27,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-16 01:44:27,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:27,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 01:44:27,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2020-09-16 01:44:27,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [99128067] [2020-09-16 01:44:27,437 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:27,437 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:27,438 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-16 01:44:27,438 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:27,439 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:27,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:27,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:44:27,440 INFO L87 Difference]: Start difference. First operand 4856 states and 17428 transitions. Second operand 3 states. [2020-09-16 01:44:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:27,530 INFO L93 Difference]: Finished difference Result 5481 states and 19553 transitions. [2020-09-16 01:44:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:27,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-16 01:44:27,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:27,583 INFO L225 Difference]: With dead ends: 5481 [2020-09-16 01:44:27,583 INFO L226 Difference]: Without dead ends: 5481 [2020-09-16 01:44:27,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:44:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2020-09-16 01:44:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5481. [2020-09-16 01:44:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5481 states. [2020-09-16 01:44:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 19553 transitions. [2020-09-16 01:44:27,813 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 19553 transitions. Word has length 8 [2020-09-16 01:44:27,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:27,813 INFO L479 AbstractCegarLoop]: Abstraction has 5481 states and 19553 transitions. [2020-09-16 01:44:27,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:27,814 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 19553 transitions. [2020-09-16 01:44:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 01:44:27,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:27,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:28,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-16 01:44:28,027 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:28,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1279390486, now seen corresponding path program 1 times [2020-09-16 01:44:28,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:28,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140586198] [2020-09-16 01:44:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:28,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140586198] [2020-09-16 01:44:28,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986002963] [2020-09-16 01:44:28,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:28,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-16 01:44:28,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:28,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:44:28,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-16 01:44:28,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [742362691] [2020-09-16 01:44:28,236 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:28,238 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:28,240 INFO L274 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2020-09-16 01:44:28,240 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:28,241 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:28,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 01:44:28,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:28,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 01:44:28,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:44:28,243 INFO L87 Difference]: Start difference. First operand 5481 states and 19553 transitions. Second operand 6 states. [2020-09-16 01:44:28,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:28,330 INFO L93 Difference]: Finished difference Result 5481 states and 19549 transitions. [2020-09-16 01:44:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:44:28,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-09-16 01:44:28,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:28,381 INFO L225 Difference]: With dead ends: 5481 [2020-09-16 01:44:28,381 INFO L226 Difference]: Without dead ends: 5481 [2020-09-16 01:44:28,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:44:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2020-09-16 01:44:28,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 5481. [2020-09-16 01:44:28,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5481 states. [2020-09-16 01:44:28,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 19549 transitions. [2020-09-16 01:44:28,602 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 19549 transitions. Word has length 9 [2020-09-16 01:44:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:28,602 INFO L479 AbstractCegarLoop]: Abstraction has 5481 states and 19549 transitions. [2020-09-16 01:44:28,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 01:44:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 19549 transitions. [2020-09-16 01:44:28,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 01:44:28,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:28,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:28,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:44:28,818 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:28,819 INFO L82 PathProgramCache]: Analyzing trace with hash 41565569, now seen corresponding path program 1 times [2020-09-16 01:44:28,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:28,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643806309] [2020-09-16 01:44:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-16 01:44:28,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643806309] [2020-09-16 01:44:28,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:44:28,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 01:44:28,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [260259417] [2020-09-16 01:44:28,865 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:28,867 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:28,869 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 13 transitions. [2020-09-16 01:44:28,869 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:28,869 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:28,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 01:44:28,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 01:44:28,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:44:28,870 INFO L87 Difference]: Start difference. First operand 5481 states and 19549 transitions. Second operand 4 states. [2020-09-16 01:44:28,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:28,931 INFO L93 Difference]: Finished difference Result 4985 states and 16961 transitions. [2020-09-16 01:44:28,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:44:28,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-09-16 01:44:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:28,952 INFO L225 Difference]: With dead ends: 4985 [2020-09-16 01:44:28,953 INFO L226 Difference]: Without dead ends: 4985 [2020-09-16 01:44:28,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:44:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4985 states. [2020-09-16 01:44:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4985 to 4793. [2020-09-16 01:44:29,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4793 states. [2020-09-16 01:44:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 16469 transitions. [2020-09-16 01:44:29,118 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 16469 transitions. Word has length 13 [2020-09-16 01:44:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:29,118 INFO L479 AbstractCegarLoop]: Abstraction has 4793 states and 16469 transitions. [2020-09-16 01:44:29,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 01:44:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 16469 transitions. [2020-09-16 01:44:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-16 01:44:29,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:29,121 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:29,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-16 01:44:29,121 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:29,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:29,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1534304145, now seen corresponding path program 1 times [2020-09-16 01:44:29,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:29,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123403134] [2020-09-16 01:44:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:29,150 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:29,168 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:29,178 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-16 01:44:29,179 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-16 01:44:29,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-16 01:44:29,179 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-16 01:44:29,180 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-16 01:44:29,180 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-09-16 01:44:29,188 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,188 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,188 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,188 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,188 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,189 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,189 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,189 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,189 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,189 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,189 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,190 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,190 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,190 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,190 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,190 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,190 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,191 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,191 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,191 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,191 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,191 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,191 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,192 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,192 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,192 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,192 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,192 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,192 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,192 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,193 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,193 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,193 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,193 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,193 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,194 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,194 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,194 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,194 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,194 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,196 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,196 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,196 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,196 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,197 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,198 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,198 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,198 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,198 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,199 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,200 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,200 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,200 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,200 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,200 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,202 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,202 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,202 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,202 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,202 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:29,207 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-16 01:44:29,208 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:44:29,208 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:44:29,208 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:44:29,208 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:44:29,208 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:44:29,208 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:44:29,208 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:44:29,208 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:44:29,210 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 258 flow [2020-09-16 01:44:29,210 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-09-16 01:44:29,399 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-09-16 01:44:29,399 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-09-16 01:44:29,404 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1172 events. 189/1172 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6706 event pairs, 23 based on Foata normal form. 0/967 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2020-09-16 01:44:29,432 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-09-16 01:44:29,576 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-09-16 01:44:29,576 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-09-16 01:44:29,582 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1172 events. 189/1172 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6706 event pairs, 23 based on Foata normal form. 0/967 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2020-09-16 01:44:29,599 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2850 [2020-09-16 01:44:29,600 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:44:30,822 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-09-16 01:44:31,049 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-09-16 01:44:31,213 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-09-16 01:44:31,289 INFO L206 etLargeBlockEncoding]: Checked pairs total: 5971 [2020-09-16 01:44:31,289 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-16 01:44:31,289 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 38 transitions, 136 flow [2020-09-16 01:44:33,644 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 26310 states. [2020-09-16 01:44:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 26310 states. [2020-09-16 01:44:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-16 01:44:33,645 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:33,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-16 01:44:33,645 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:33,645 INFO L82 PathProgramCache]: Analyzing trace with hash 29336307, now seen corresponding path program 1 times [2020-09-16 01:44:33,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:33,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69719332] [2020-09-16 01:44:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:33,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69719332] [2020-09-16 01:44:33,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:44:33,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 01:44:33,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [514026007] [2020-09-16 01:44:33,676 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:33,676 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:33,676 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-16 01:44:33,677 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:33,677 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:33,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:33,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:33,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:33,678 INFO L87 Difference]: Start difference. First operand 26310 states. Second operand 3 states. [2020-09-16 01:44:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:34,673 INFO L93 Difference]: Finished difference Result 26310 states and 110676 transitions. [2020-09-16 01:44:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:34,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-16 01:44:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:34,830 INFO L225 Difference]: With dead ends: 26310 [2020-09-16 01:44:34,830 INFO L226 Difference]: Without dead ends: 23184 [2020-09-16 01:44:34,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:44:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23184 states. [2020-09-16 01:44:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23184 to 23184. [2020-09-16 01:44:35,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23184 states. [2020-09-16 01:44:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23184 states to 23184 states and 98175 transitions. [2020-09-16 01:44:36,027 INFO L78 Accepts]: Start accepts. Automaton has 23184 states and 98175 transitions. Word has length 4 [2020-09-16 01:44:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:36,028 INFO L479 AbstractCegarLoop]: Abstraction has 23184 states and 98175 transitions. [2020-09-16 01:44:36,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 23184 states and 98175 transitions. [2020-09-16 01:44:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 01:44:36,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:36,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:36,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-16 01:44:36,029 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash 805936127, now seen corresponding path program 1 times [2020-09-16 01:44:36,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:36,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616584127] [2020-09-16 01:44:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:44:36,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616584127] [2020-09-16 01:44:36,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627616825] [2020-09-16 01:44:36,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-16 01:44:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:36,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 01:44:36,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2020-09-16 01:44:36,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [597766315] [2020-09-16 01:44:36,171 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:36,171 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:36,172 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-16 01:44:36,172 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:36,172 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:36,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:44:36,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:44:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:44:36,173 INFO L87 Difference]: Start difference. First operand 23184 states and 98175 transitions. Second operand 3 states. [2020-09-16 01:44:36,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:36,339 INFO L93 Difference]: Finished difference Result 26309 states and 110675 transitions. [2020-09-16 01:44:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:44:36,340 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-16 01:44:36,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:36,473 INFO L225 Difference]: With dead ends: 26309 [2020-09-16 01:44:36,473 INFO L226 Difference]: Without dead ends: 26309 [2020-09-16 01:44:36,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:44:36,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26309 states. [2020-09-16 01:44:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26309 to 26309. [2020-09-16 01:44:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26309 states. [2020-09-16 01:44:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26309 states to 26309 states and 110675 transitions. [2020-09-16 01:44:39,098 INFO L78 Accepts]: Start accepts. Automaton has 26309 states and 110675 transitions. Word has length 8 [2020-09-16 01:44:39,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:39,098 INFO L479 AbstractCegarLoop]: Abstraction has 26309 states and 110675 transitions. [2020-09-16 01:44:39,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:44:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 26309 states and 110675 transitions. [2020-09-16 01:44:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 01:44:39,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:39,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:39,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-16 01:44:39,300 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:39,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:39,300 INFO L82 PathProgramCache]: Analyzing trace with hash -785782832, now seen corresponding path program 1 times [2020-09-16 01:44:39,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:39,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280019150] [2020-09-16 01:44:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:39,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280019150] [2020-09-16 01:44:39,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038271854] [2020-09-16 01:44:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:39,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-16 01:44:39,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:39,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:44:39,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:44:39,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-16 01:44:39,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1147140585] [2020-09-16 01:44:39,437 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:39,437 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:39,438 INFO L274 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2020-09-16 01:44:39,438 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:39,439 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:39,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 01:44:39,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:39,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 01:44:39,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:44:39,441 INFO L87 Difference]: Start difference. First operand 26309 states and 110675 transitions. Second operand 6 states. [2020-09-16 01:44:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:39,986 INFO L93 Difference]: Finished difference Result 26309 states and 110671 transitions. [2020-09-16 01:44:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:44:39,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-09-16 01:44:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:40,076 INFO L225 Difference]: With dead ends: 26309 [2020-09-16 01:44:40,076 INFO L226 Difference]: Without dead ends: 26309 [2020-09-16 01:44:40,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:44:40,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26309 states. [2020-09-16 01:44:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26309 to 26309. [2020-09-16 01:44:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26309 states. [2020-09-16 01:44:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26309 states to 26309 states and 110671 transitions. [2020-09-16 01:44:42,696 INFO L78 Accepts]: Start accepts. Automaton has 26309 states and 110671 transitions. Word has length 9 [2020-09-16 01:44:42,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:42,696 INFO L479 AbstractCegarLoop]: Abstraction has 26309 states and 110671 transitions. [2020-09-16 01:44:42,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 01:44:42,696 INFO L276 IsEmpty]: Start isEmpty. Operand 26309 states and 110671 transitions. [2020-09-16 01:44:42,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 01:44:42,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:42,697 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:42,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:44:42,900 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:42,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:42,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1486090629, now seen corresponding path program 1 times [2020-09-16 01:44:42,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:42,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549325198] [2020-09-16 01:44:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-16 01:44:42,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549325198] [2020-09-16 01:44:42,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:44:42,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 01:44:42,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1171148749] [2020-09-16 01:44:42,952 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:42,953 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:42,954 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 13 transitions. [2020-09-16 01:44:42,954 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:42,955 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:42,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 01:44:42,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:42,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 01:44:42,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:44:42,956 INFO L87 Difference]: Start difference. First operand 26309 states and 110671 transitions. Second operand 4 states. [2020-09-16 01:44:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:43,119 INFO L93 Difference]: Finished difference Result 24533 states and 99507 transitions. [2020-09-16 01:44:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:44:43,120 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-09-16 01:44:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:43,192 INFO L225 Difference]: With dead ends: 24533 [2020-09-16 01:44:43,193 INFO L226 Difference]: Without dead ends: 24533 [2020-09-16 01:44:43,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:44:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24533 states. [2020-09-16 01:44:44,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24533 to 23573. [2020-09-16 01:44:44,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23573 states. [2020-09-16 01:44:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23573 states to 23573 states and 96327 transitions. [2020-09-16 01:44:44,136 INFO L78 Accepts]: Start accepts. Automaton has 23573 states and 96327 transitions. Word has length 13 [2020-09-16 01:44:44,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:44,136 INFO L479 AbstractCegarLoop]: Abstraction has 23573 states and 96327 transitions. [2020-09-16 01:44:44,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 01:44:44,136 INFO L276 IsEmpty]: Start isEmpty. Operand 23573 states and 96327 transitions. [2020-09-16 01:44:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 01:44:44,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:44,139 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:44,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-16 01:44:44,140 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:44,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:44,140 INFO L82 PathProgramCache]: Analyzing trace with hash 81754288, now seen corresponding path program 1 times [2020-09-16 01:44:44,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:44,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917146533] [2020-09-16 01:44:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-16 01:44:44,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917146533] [2020-09-16 01:44:44,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245097042] [2020-09-16 01:44:44,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:44:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:44:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-16 01:44:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:44:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-16 01:44:44,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:44:44,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-16 01:44:44,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1150523270] [2020-09-16 01:44:44,329 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:44:44,332 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:44:44,337 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2020-09-16 01:44:44,337 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:44:44,416 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:44:44,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 01:44:44,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:44:44,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 01:44:44,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-16 01:44:44,417 INFO L87 Difference]: Start difference. First operand 23573 states and 96327 transitions. Second operand 8 states. [2020-09-16 01:44:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:44:44,583 INFO L93 Difference]: Finished difference Result 23557 states and 96271 transitions. [2020-09-16 01:44:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 01:44:44,583 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-16 01:44:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:44:44,653 INFO L225 Difference]: With dead ends: 23557 [2020-09-16 01:44:44,653 INFO L226 Difference]: Without dead ends: 23557 [2020-09-16 01:44:44,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-16 01:44:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23557 states. [2020-09-16 01:44:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23557 to 23557. [2020-09-16 01:44:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23557 states. [2020-09-16 01:44:45,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23557 states to 23557 states and 96271 transitions. [2020-09-16 01:44:45,632 INFO L78 Accepts]: Start accepts. Automaton has 23557 states and 96271 transitions. Word has length 20 [2020-09-16 01:44:45,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:44:45,633 INFO L479 AbstractCegarLoop]: Abstraction has 23557 states and 96271 transitions. [2020-09-16 01:44:45,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 01:44:45,633 INFO L276 IsEmpty]: Start isEmpty. Operand 23557 states and 96271 transitions. [2020-09-16 01:44:45,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-16 01:44:45,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:44:45,639 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:44:45,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:44:45,841 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:44:45,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:44:45,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1012463302, now seen corresponding path program 1 times [2020-09-16 01:44:45,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:44:45,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610778797] [2020-09-16 01:44:45,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:44:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:45,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:44:45,875 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:44:45,883 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-16 01:44:45,883 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-16 01:44:45,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-16 01:44:45,884 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-16 01:44:45,884 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-16 01:44:45,885 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-09-16 01:44:45,894 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,894 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,894 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,894 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,894 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,895 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,895 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,895 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,895 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,895 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,896 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,896 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,896 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,896 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,896 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,896 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,897 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,897 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,897 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,897 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,897 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,897 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,897 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,898 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,898 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,898 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,898 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,898 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,898 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,899 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,899 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,899 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,899 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,899 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,899 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,899 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,900 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,900 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,900 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,900 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,900 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,900 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,901 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,901 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,901 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,901 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,901 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,903 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,903 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,903 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,903 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,904 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,905 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,906 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,906 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,906 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,906 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,907 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,908 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,908 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,908 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,908 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,909 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,910 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,910 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,910 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,910 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,912 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,912 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,912 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,912 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,912 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:44:45,918 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-16 01:44:45,919 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:44:45,919 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:44:45,919 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:44:45,919 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:44:45,919 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:44:45,920 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:44:45,920 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:44:45,920 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:44:45,921 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 106 transitions, 290 flow [2020-09-16 01:44:45,921 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-09-16 01:44:46,173 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-09-16 01:44:46,173 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-09-16 01:44:46,185 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 2291 events. 399/2291 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 16164 event pairs, 72 based on Foata normal form. 0/1892 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2020-09-16 01:44:46,230 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-09-16 01:44:46,562 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-09-16 01:44:46,562 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-09-16 01:44:46,574 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 2291 events. 399/2291 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 16164 event pairs, 72 based on Foata normal form. 0/1892 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2020-09-16 01:44:46,629 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3660 [2020-09-16 01:44:46,629 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:44:47,603 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-09-16 01:44:48,412 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-16 01:44:48,529 INFO L206 etLargeBlockEncoding]: Checked pairs total: 8653 [2020-09-16 01:44:48,529 INFO L214 etLargeBlockEncoding]: Total number of compositions: 71 [2020-09-16 01:44:48,530 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 43 transitions, 164 flow [2020-09-16 01:45:28,243 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 127122 states. [2020-09-16 01:45:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 127122 states. [2020-09-16 01:45:28,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-16 01:45:28,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:45:28,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-16 01:45:28,244 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:45:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:45:28,245 INFO L82 PathProgramCache]: Analyzing trace with hash 35155697, now seen corresponding path program 1 times [2020-09-16 01:45:28,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:45:28,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790533181] [2020-09-16 01:45:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:45:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:45:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:45:28,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790533181] [2020-09-16 01:45:28,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:45:28,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-16 01:45:28,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1472608697] [2020-09-16 01:45:28,281 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:45:28,282 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:45:28,282 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-16 01:45:28,282 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:45:28,282 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:45:28,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:45:28,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:45:28,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:45:28,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:45:28,283 INFO L87 Difference]: Start difference. First operand 127122 states. Second operand 3 states. [2020-09-16 01:45:30,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:45:30,311 INFO L93 Difference]: Finished difference Result 127122 states and 615398 transitions. [2020-09-16 01:45:30,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:45:30,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-16 01:45:30,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:45:30,844 INFO L225 Difference]: With dead ends: 127122 [2020-09-16 01:45:30,844 INFO L226 Difference]: Without dead ends: 111496 [2020-09-16 01:45:30,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-16 01:45:34,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111496 states. [2020-09-16 01:45:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111496 to 111496. [2020-09-16 01:45:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111496 states. [2020-09-16 01:45:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111496 states to 111496 states and 543522 transitions. [2020-09-16 01:45:43,399 INFO L78 Accepts]: Start accepts. Automaton has 111496 states and 543522 transitions. Word has length 4 [2020-09-16 01:45:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:45:43,399 INFO L479 AbstractCegarLoop]: Abstraction has 111496 states and 543522 transitions. [2020-09-16 01:45:43,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:45:43,400 INFO L276 IsEmpty]: Start isEmpty. Operand 111496 states and 543522 transitions. [2020-09-16 01:45:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-16 01:45:43,400 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:45:43,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:45:43,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-16 01:45:43,401 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:45:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:45:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1170285684, now seen corresponding path program 1 times [2020-09-16 01:45:43,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:45:43,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909087685] [2020-09-16 01:45:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:45:43,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:45:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-16 01:45:43,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909087685] [2020-09-16 01:45:43,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877592318] [2020-09-16 01:45:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:45:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:45:43,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjunts are in the unsatisfiable core [2020-09-16 01:45:43,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:45:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:45:43,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-16 01:45:43,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2020-09-16 01:45:43,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1733782557] [2020-09-16 01:45:43,543 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:45:43,544 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:45:43,544 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-16 01:45:43,544 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:45:43,545 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:45:43,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-16 01:45:43,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:45:43,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-16 01:45:43,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:45:43,546 INFO L87 Difference]: Start difference. First operand 111496 states and 543522 transitions. Second operand 3 states. [2020-09-16 01:45:51,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:45:51,371 INFO L93 Difference]: Finished difference Result 127121 states and 615397 transitions. [2020-09-16 01:45:51,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-16 01:45:51,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-09-16 01:45:51,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:45:51,979 INFO L225 Difference]: With dead ends: 127121 [2020-09-16 01:45:51,980 INFO L226 Difference]: Without dead ends: 127121 [2020-09-16 01:45:51,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-16 01:45:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127121 states. [2020-09-16 01:45:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127121 to 127121. [2020-09-16 01:45:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127121 states. [2020-09-16 01:46:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127121 states to 127121 states and 615397 transitions. [2020-09-16 01:46:00,359 INFO L78 Accepts]: Start accepts. Automaton has 127121 states and 615397 transitions. Word has length 8 [2020-09-16 01:46:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:46:00,359 INFO L479 AbstractCegarLoop]: Abstraction has 127121 states and 615397 transitions. [2020-09-16 01:46:00,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-16 01:46:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 127121 states and 615397 transitions. [2020-09-16 01:46:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-16 01:46:00,360 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:46:00,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:46:00,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-16 01:46:00,566 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:46:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:46:00,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1919116790, now seen corresponding path program 1 times [2020-09-16 01:46:00,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:46:00,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380555571] [2020-09-16 01:46:00,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:46:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:46:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:46:00,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380555571] [2020-09-16 01:46:00,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019793324] [2020-09-16 01:46:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:46:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:46:00,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-16 01:46:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:46:00,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-16 01:46:00,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:46:00,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-16 01:46:00,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [101255130] [2020-09-16 01:46:00,726 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:46:00,726 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:46:00,727 INFO L274 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2020-09-16 01:46:00,727 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:46:00,728 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:46:00,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-16 01:46:00,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:46:00,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-16 01:46:00,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:46:00,729 INFO L87 Difference]: Start difference. First operand 127121 states and 615397 transitions. Second operand 6 states. [2020-09-16 01:46:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:46:08,279 INFO L93 Difference]: Finished difference Result 127121 states and 615393 transitions. [2020-09-16 01:46:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:46:08,279 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-09-16 01:46:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:46:08,887 INFO L225 Difference]: With dead ends: 127121 [2020-09-16 01:46:08,887 INFO L226 Difference]: Without dead ends: 127121 [2020-09-16 01:46:08,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-16 01:46:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127121 states. [2020-09-16 01:46:14,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127121 to 127121. [2020-09-16 01:46:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127121 states. [2020-09-16 01:46:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127121 states to 127121 states and 615393 transitions. [2020-09-16 01:46:16,290 INFO L78 Accepts]: Start accepts. Automaton has 127121 states and 615393 transitions. Word has length 9 [2020-09-16 01:46:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:46:16,290 INFO L479 AbstractCegarLoop]: Abstraction has 127121 states and 615393 transitions. [2020-09-16 01:46:16,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-16 01:46:16,290 INFO L276 IsEmpty]: Start isEmpty. Operand 127121 states and 615393 transitions. [2020-09-16 01:46:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-16 01:46:16,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:46:16,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:46:16,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-16 01:46:16,492 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:46:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:46:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2046881392, now seen corresponding path program 1 times [2020-09-16 01:46:16,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:46:16,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286427347] [2020-09-16 01:46:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:46:16,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:46:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-16 01:46:16,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286427347] [2020-09-16 01:46:16,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-16 01:46:16,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-16 01:46:16,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1632101162] [2020-09-16 01:46:16,536 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:46:16,538 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:46:16,539 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 13 transitions. [2020-09-16 01:46:16,539 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:46:16,539 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:46:16,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-16 01:46:16,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:46:16,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-16 01:46:16,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:46:16,540 INFO L87 Difference]: Start difference. First operand 127121 states and 615393 transitions. Second operand 4 states. [2020-09-16 01:46:17,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:46:17,400 INFO L93 Difference]: Finished difference Result 120737 states and 568389 transitions. [2020-09-16 01:46:17,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-16 01:46:17,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-09-16 01:46:17,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:46:17,919 INFO L225 Difference]: With dead ends: 120737 [2020-09-16 01:46:17,919 INFO L226 Difference]: Without dead ends: 120737 [2020-09-16 01:46:17,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-16 01:46:26,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120737 states. [2020-09-16 01:46:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120737 to 116193. [2020-09-16 01:46:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116193 states. [2020-09-16 01:46:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116193 states to 116193 states and 549849 transitions. [2020-09-16 01:46:30,139 INFO L78 Accepts]: Start accepts. Automaton has 116193 states and 549849 transitions. Word has length 13 [2020-09-16 01:46:30,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:46:30,140 INFO L479 AbstractCegarLoop]: Abstraction has 116193 states and 549849 transitions. [2020-09-16 01:46:30,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-16 01:46:30,140 INFO L276 IsEmpty]: Start isEmpty. Operand 116193 states and 549849 transitions. [2020-09-16 01:46:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-16 01:46:30,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:46:30,144 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:46:30,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-16 01:46:30,144 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:46:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:46:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash 173719339, now seen corresponding path program 1 times [2020-09-16 01:46:30,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:46:30,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859490987] [2020-09-16 01:46:30,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:46:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:46:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-16 01:46:30,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859490987] [2020-09-16 01:46:30,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430057553] [2020-09-16 01:46:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:46:30,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:46:30,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-16 01:46:30,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:46:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-16 01:46:30,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:46:30,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-16 01:46:30,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1254469993] [2020-09-16 01:46:30,334 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:46:30,337 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:46:30,341 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 44 transitions. [2020-09-16 01:46:30,342 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:46:30,418 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:46:30,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-16 01:46:30,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:46:30,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-16 01:46:30,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-16 01:46:30,420 INFO L87 Difference]: Start difference. First operand 116193 states and 549849 transitions. Second operand 8 states. [2020-09-16 01:46:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:46:37,286 INFO L93 Difference]: Finished difference Result 116177 states and 549793 transitions. [2020-09-16 01:46:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-16 01:46:37,287 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-16 01:46:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:46:38,056 INFO L225 Difference]: With dead ends: 116177 [2020-09-16 01:46:38,057 INFO L226 Difference]: Without dead ends: 116177 [2020-09-16 01:46:38,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-16 01:46:40,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116177 states. [2020-09-16 01:46:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116177 to 116177. [2020-09-16 01:46:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116177 states. [2020-09-16 01:46:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116177 states to 116177 states and 549793 transitions. [2020-09-16 01:46:43,856 INFO L78 Accepts]: Start accepts. Automaton has 116177 states and 549793 transitions. Word has length 20 [2020-09-16 01:46:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:46:43,856 INFO L479 AbstractCegarLoop]: Abstraction has 116177 states and 549793 transitions. [2020-09-16 01:46:43,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-16 01:46:43,857 INFO L276 IsEmpty]: Start isEmpty. Operand 116177 states and 549793 transitions. [2020-09-16 01:46:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-16 01:46:43,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:46:43,865 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:46:44,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-09-16 01:46:44,078 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:46:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:46:44,079 INFO L82 PathProgramCache]: Analyzing trace with hash -999416206, now seen corresponding path program 1 times [2020-09-16 01:46:44,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:46:44,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984959553] [2020-09-16 01:46:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:46:44,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:46:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-16 01:46:44,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984959553] [2020-09-16 01:46:44,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513354443] [2020-09-16 01:46:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-16 01:46:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-16 01:46:44,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-16 01:46:44,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-16 01:46:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-16 01:46:44,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-16 01:46:44,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 8 [2020-09-16 01:46:44,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1970406264] [2020-09-16 01:46:44,311 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-16 01:46:44,313 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-16 01:46:44,318 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 56 transitions. [2020-09-16 01:46:44,318 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-16 01:46:44,419 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-16 01:46:44,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-16 01:46:44,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-16 01:46:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-16 01:46:44,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2020-09-16 01:46:44,421 INFO L87 Difference]: Start difference. First operand 116177 states and 549793 transitions. Second operand 9 states. [2020-09-16 01:46:46,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-16 01:46:46,329 INFO L93 Difference]: Finished difference Result 94230 states and 434726 transitions. [2020-09-16 01:46:46,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-16 01:46:46,329 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-16 01:46:46,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-16 01:46:46,730 INFO L225 Difference]: With dead ends: 94230 [2020-09-16 01:46:46,730 INFO L226 Difference]: Without dead ends: 94230 [2020-09-16 01:46:46,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2020-09-16 01:46:54,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94230 states. [2020-09-16 01:46:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94230 to 94012. [2020-09-16 01:46:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94012 states. [2020-09-16 01:46:56,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94012 states to 94012 states and 434318 transitions. [2020-09-16 01:46:56,732 INFO L78 Accepts]: Start accepts. Automaton has 94012 states and 434318 transitions. Word has length 24 [2020-09-16 01:46:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-16 01:46:56,733 INFO L479 AbstractCegarLoop]: Abstraction has 94012 states and 434318 transitions. [2020-09-16 01:46:56,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-16 01:46:56,733 INFO L276 IsEmpty]: Start isEmpty. Operand 94012 states and 434318 transitions. [2020-09-16 01:46:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-16 01:46:56,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-16 01:46:56,749 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-16 01:46:56,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-16 01:46:56,965 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-16 01:46:56,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-16 01:46:56,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1963695170, now seen corresponding path program 1 times [2020-09-16 01:46:56,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-16 01:46:56,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465370698] [2020-09-16 01:46:56,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-16 01:46:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:46:56,991 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:46:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-16 01:46:57,010 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-16 01:46:57,019 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-16 01:46:57,019 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-16 01:46:57,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-16 01:46:57,020 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-16 01:46:57,021 WARN L363 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-16 01:46:57,021 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-09-16 01:46:57,040 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,040 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,040 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,041 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,041 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,041 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,041 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,041 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,042 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,042 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,042 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,042 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,042 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,042 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,042 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,043 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,043 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,043 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,043 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,043 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,043 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,044 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,044 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,044 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,044 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,044 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,044 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,045 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,045 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,045 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,045 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,045 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,045 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,045 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,046 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,046 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,046 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,046 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,046 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,046 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,046 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,047 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,047 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,047 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,047 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,047 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,047 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,048 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,048 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,048 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,048 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,049 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,049 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,049 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,050 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,050 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,051 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,051 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,051 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,052 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,052 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,053 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,053 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,053 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,054 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,054 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,054 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,055 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,055 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,057 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,057 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,057 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,057 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,057 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,059 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,059 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,059 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,059 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,059 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,062 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,063 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,063 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,063 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,063 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-16 01:46:57,070 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-16 01:46:57,070 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-16 01:46:57,070 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-16 01:46:57,071 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-16 01:46:57,071 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-16 01:46:57,071 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-16 01:46:57,071 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-16 01:46:57,071 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-16 01:46:57,071 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-16 01:46:57,073 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 113 transitions, 324 flow [2020-09-16 01:46:57,073 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-09-16 01:46:57,614 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-09-16 01:46:57,614 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-09-16 01:46:57,640 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4546 events. 849/4546 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 38350 event pairs, 201 based on Foata normal form. 0/3761 useless extension candidates. Maximal degree in co-relation 2509. Up to 448 conditions per place. [2020-09-16 01:46:57,749 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-09-16 01:46:58,270 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-09-16 01:46:58,270 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-09-16 01:46:58,300 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4546 events. 849/4546 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 38350 event pairs, 201 based on Foata normal form. 0/3761 useless extension candidates. Maximal degree in co-relation 2509. Up to 448 conditions per place. [2020-09-16 01:46:59,187 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 4550 [2020-09-16 01:46:59,187 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-16 01:47:00,889 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-16 01:47:00,991 INFO L206 etLargeBlockEncoding]: Checked pairs total: 11131 [2020-09-16 01:47:00,992 INFO L214 etLargeBlockEncoding]: Total number of compositions: 75 [2020-09-16 01:47:00,992 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 48 transitions, 194 flow