/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:47:26,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:47:26,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:47:26,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:47:26,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:47:26,688 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:47:26,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:47:26,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:47:26,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:47:26,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:47:26,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:47:26,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:47:26,707 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:47:26,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:47:26,712 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:47:26,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:47:26,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:47:26,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:47:26,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:47:26,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:47:26,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:47:26,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:47:26,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:47:26,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:47:26,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:47:26,750 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:47:26,750 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:47:26,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:47:26,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:47:26,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:47:26,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:47:26,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:47:26,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:47:26,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:47:26,765 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:47:26,765 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:47:26,766 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:47:26,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:47:26,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:47:26,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:47:26,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:47:26,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:47:26,808 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:47:26,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:47:26,810 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:47:26,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:47:26,811 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:47:26,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:47:26,811 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:47:26,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:47:26,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:47:26,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:47:26,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:47:26,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:47:26,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:47:26,813 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:47:26,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:47:26,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:47:26,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:47:26,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:47:26,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:47:26,814 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:47:26,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:47:26,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:47:26,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:47:26,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:47:26,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:47:26,815 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:47:26,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:47:26,815 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:47:26,816 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:47:26,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:47:27,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:47:27,157 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:47:27,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:47:27,164 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:47:27,164 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:47:27,165 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-09 14:47:27,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/162be7c2a/7eb26d84ab994836b9b1349d84822818/FLAG11592edb3 [2020-10-09 14:47:27,898 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:47:27,899 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-09 14:47:27,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/162be7c2a/7eb26d84ab994836b9b1349d84822818/FLAG11592edb3 [2020-10-09 14:47:28,085 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/162be7c2a/7eb26d84ab994836b9b1349d84822818 [2020-10-09 14:47:28,097 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:47:28,098 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:47:28,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:47:28,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:47:28,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:47:28,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:28,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20075267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28, skipping insertion in model container [2020-10-09 14:47:28,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:28,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:47:28,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:47:28,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:47:28,768 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:47:28,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:47:28,916 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:47:28,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28 WrapperNode [2020-10-09 14:47:28,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:47:28,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:47:28,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:47:28,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:47:28,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:28,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:28,983 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:47:28,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:47:28,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:47:28,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:47:28,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:28,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:28,996 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:28,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:29,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:29,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:29,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... [2020-10-09 14:47:29,016 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:47:29,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:47:29,017 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:47:29,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:47:29,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:47:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 14:47:29,103 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 14:47:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 14:47:29,103 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 14:47:29,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:47:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 14:47:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:47:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:47:29,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 14:47:29,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:47:29,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:47:29,107 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:47:29,570 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:47:29,571 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 14:47:29,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:47:29 BoogieIcfgContainer [2020-10-09 14:47:29,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:47:29,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:47:29,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:47:29,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:47:29,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:47:28" (1/3) ... [2020-10-09 14:47:29,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b56ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:47:29, skipping insertion in model container [2020-10-09 14:47:29,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:47:28" (2/3) ... [2020-10-09 14:47:29,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b56ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:47:29, skipping insertion in model container [2020-10-09 14:47:29,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:47:29" (3/3) ... [2020-10-09 14:47:29,584 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-09 14:47:29,598 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:47:29,609 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:47:29,610 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:47:29,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,640 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,643 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,643 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,651 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,651 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,652 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,652 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,652 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,652 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,662 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,663 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,663 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,663 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,663 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,664 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:47:29,688 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:47:29,714 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:47:29,714 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:47:29,714 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:47:29,714 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:47:29,714 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:47:29,714 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:47:29,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:47:29,715 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:47:29,730 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-09 14:47:29,776 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-09 14:47:29,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:47:29,789 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-09 14:47:29,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-09 14:47:29,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-09 14:47:29,836 INFO L129 PetriNetUnfolder]: 4/43 cut-off events. [2020-10-09 14:47:29,837 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:47:29,838 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:29,841 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:29,842 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash 305903693, now seen corresponding path program 1 times [2020-10-09 14:47:29,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:29,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371366292] [2020-10-09 14:47:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 14:47:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:30,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:30,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:30,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:30,210 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:30,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371366292] [2020-10-09 14:47:30,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:47:30,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-09 14:47:30,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358060943] [2020-10-09 14:47:30,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 14:47:30,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 14:47:30,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-09 14:47:30,420 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:30,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 112 flow. Second operand 9 states. [2020-10-09 14:47:30,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:30,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:30,425 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:30,875 INFO L129 PetriNetUnfolder]: 73/340 cut-off events. [2020-10-09 14:47:30,875 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:47:30,879 INFO L80 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 340 events. 73/340 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1887 event pairs, 0 based on Foata normal form. 78/390 useless extension candidates. Maximal degree in co-relation 444. Up to 45 conditions per place. [2020-10-09 14:47:30,883 INFO L132 encePairwiseOnDemand]: 44/55 looper letters, 17 selfloop transitions, 16 changer transitions 18/92 dead transitions. [2020-10-09 14:47:30,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 292 flow [2020-10-09 14:47:30,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 14:47:30,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 14:47:30,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 775 transitions. [2020-10-09 14:47:30,910 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8806818181818182 [2020-10-09 14:47:30,912 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 775 transitions. [2020-10-09 14:47:30,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 775 transitions. [2020-10-09 14:47:30,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:30,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 775 transitions. [2020-10-09 14:47:30,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 14:47:30,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 14:47:30,940 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 14:47:30,944 INFO L185 Difference]: Start difference. First operand has 55 places, 53 transitions, 112 flow. Second operand 16 states and 775 transitions. [2020-10-09 14:47:30,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 292 flow [2020-10-09 14:47:30,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 14:47:30,958 INFO L241 Difference]: Finished difference. Result has 82 places, 67 transitions, 250 flow [2020-10-09 14:47:30,961 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=250, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2020-10-09 14:47:30,963 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2020-10-09 14:47:30,964 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 250 flow [2020-10-09 14:47:30,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 14:47:30,964 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:30,964 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:31,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:47:31,179 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:31,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1723906183, now seen corresponding path program 1 times [2020-10-09 14:47:31,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:31,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [7942945] [2020-10-09 14:47:31,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:31,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 14:47:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:31,322 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:31,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:31,362 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:31,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [7942945] [2020-10-09 14:47:31,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:47:31,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2020-10-09 14:47:31,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902552144] [2020-10-09 14:47:31,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 14:47:31,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 14:47:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-09 14:47:31,706 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:31,707 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 250 flow. Second operand 11 states. [2020-10-09 14:47:31,708 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:31,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:31,708 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:32,248 INFO L129 PetriNetUnfolder]: 96/452 cut-off events. [2020-10-09 14:47:32,249 INFO L130 PetriNetUnfolder]: For 1731/1846 co-relation queries the response was YES. [2020-10-09 14:47:32,254 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 452 events. 96/452 cut-off events. For 1731/1846 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2535 event pairs, 1 based on Foata normal form. 25/434 useless extension candidates. Maximal degree in co-relation 1171. Up to 68 conditions per place. [2020-10-09 14:47:32,259 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 31 selfloop transitions, 42 changer transitions 43/150 dead transitions. [2020-10-09 14:47:32,259 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 150 transitions, 1174 flow [2020-10-09 14:47:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 14:47:32,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-09 14:47:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1062 transitions. [2020-10-09 14:47:32,265 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8395256916996048 [2020-10-09 14:47:32,266 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1062 transitions. [2020-10-09 14:47:32,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1062 transitions. [2020-10-09 14:47:32,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:32,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1062 transitions. [2020-10-09 14:47:32,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-09 14:47:32,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-09 14:47:32,275 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-09 14:47:32,275 INFO L185 Difference]: Start difference. First operand has 82 places, 67 transitions, 250 flow. Second operand 23 states and 1062 transitions. [2020-10-09 14:47:32,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 150 transitions, 1174 flow [2020-10-09 14:47:32,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 150 transitions, 1098 flow, removed 37 selfloop flow, removed 5 redundant places. [2020-10-09 14:47:32,294 INFO L241 Difference]: Finished difference. Result has 113 places, 92 transitions, 713 flow [2020-10-09 14:47:32,295 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=713, PETRI_PLACES=113, PETRI_TRANSITIONS=92} [2020-10-09 14:47:32,296 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2020-10-09 14:47:32,297 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 92 transitions, 713 flow [2020-10-09 14:47:32,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 14:47:32,297 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:32,298 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:32,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:47:32,512 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1269320736, now seen corresponding path program 1 times [2020-10-09 14:47:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:32,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320005054] [2020-10-09 14:47:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:32,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:32,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:47:32,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:32,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:32,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:32,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:32,725 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:32,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320005054] [2020-10-09 14:47:32,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1986388988] [2020-10-09 14:47:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:32,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:32,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:47:32,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:32,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:32,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:32,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:32,959 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:32,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104153581] [2020-10-09 14:47:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:47:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:33,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:47:33,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:33,039 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:33,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:33,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:33,071 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:33,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:47:33,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2020-10-09 14:47:33,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776265803] [2020-10-09 14:47:33,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:47:33,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:33,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:47:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:47:33,294 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:33,295 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 92 transitions, 713 flow. Second operand 13 states. [2020-10-09 14:47:33,295 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:33,296 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:33,296 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:34,054 INFO L129 PetriNetUnfolder]: 98/500 cut-off events. [2020-10-09 14:47:34,055 INFO L130 PetriNetUnfolder]: For 4940/5111 co-relation queries the response was YES. [2020-10-09 14:47:34,059 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 500 events. 98/500 cut-off events. For 4940/5111 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2760 event pairs, 2 based on Foata normal form. 42/490 useless extension candidates. Maximal degree in co-relation 1732. Up to 78 conditions per place. [2020-10-09 14:47:34,065 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 44 selfloop transitions, 56 changer transitions 25/159 dead transitions. [2020-10-09 14:47:34,065 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 159 transitions, 2058 flow [2020-10-09 14:47:34,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 14:47:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-09 14:47:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1192 transitions. [2020-10-09 14:47:34,071 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8335664335664336 [2020-10-09 14:47:34,071 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1192 transitions. [2020-10-09 14:47:34,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1192 transitions. [2020-10-09 14:47:34,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:34,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1192 transitions. [2020-10-09 14:47:34,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-09 14:47:34,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-09 14:47:34,080 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-09 14:47:34,080 INFO L185 Difference]: Start difference. First operand has 113 places, 92 transitions, 713 flow. Second operand 26 states and 1192 transitions. [2020-10-09 14:47:34,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 159 transitions, 2058 flow [2020-10-09 14:47:34,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1606 flow, removed 211 selfloop flow, removed 11 redundant places. [2020-10-09 14:47:34,101 INFO L241 Difference]: Finished difference. Result has 127 places, 114 transitions, 1030 flow [2020-10-09 14:47:34,102 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1030, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2020-10-09 14:47:34,103 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2020-10-09 14:47:34,103 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 1030 flow [2020-10-09 14:47:34,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:47:34,103 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:34,104 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:34,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:47:34,728 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1653313534, now seen corresponding path program 1 times [2020-10-09 14:47:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:34,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [140461912] [2020-10-09 14:47:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:47:34,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:34,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:34,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:34,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:34,896 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:34,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [140461912] [2020-10-09 14:47:34,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1450759705] [2020-10-09 14:47:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:47:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:35,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:35,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:35,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:35,116 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:35,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970275925] [2020-10-09 14:47:35,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:47:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:35,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:47:35,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:35,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:35,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:35,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:35,228 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:35,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:47:35,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 15 [2020-10-09 14:47:35,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575217828] [2020-10-09 14:47:35,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 14:47:35,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:35,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 14:47:35,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 14:47:35,433 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:35,434 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 1030 flow. Second operand 15 states. [2020-10-09 14:47:35,434 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:35,435 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:35,435 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:36,392 INFO L129 PetriNetUnfolder]: 111/618 cut-off events. [2020-10-09 14:47:36,393 INFO L130 PetriNetUnfolder]: For 8357/8454 co-relation queries the response was YES. [2020-10-09 14:47:36,400 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 618 events. 111/618 cut-off events. For 8357/8454 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3476 event pairs, 0 based on Foata normal form. 50/607 useless extension candidates. Maximal degree in co-relation 2323. Up to 78 conditions per place. [2020-10-09 14:47:36,410 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 36 selfloop transitions, 86 changer transitions 26/182 dead transitions. [2020-10-09 14:47:36,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 182 transitions, 2905 flow [2020-10-09 14:47:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 14:47:36,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-09 14:47:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1421 transitions. [2020-10-09 14:47:36,417 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8334310850439882 [2020-10-09 14:47:36,417 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1421 transitions. [2020-10-09 14:47:36,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1421 transitions. [2020-10-09 14:47:36,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:36,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1421 transitions. [2020-10-09 14:47:36,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-09 14:47:36,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-09 14:47:36,428 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-09 14:47:36,428 INFO L185 Difference]: Start difference. First operand has 127 places, 114 transitions, 1030 flow. Second operand 31 states and 1421 transitions. [2020-10-09 14:47:36,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 182 transitions, 2905 flow [2020-10-09 14:47:36,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 182 transitions, 2478 flow, removed 205 selfloop flow, removed 10 redundant places. [2020-10-09 14:47:36,471 INFO L241 Difference]: Finished difference. Result has 157 places, 142 transitions, 1593 flow [2020-10-09 14:47:36,472 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1593, PETRI_PLACES=157, PETRI_TRANSITIONS=142} [2020-10-09 14:47:36,472 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2020-10-09 14:47:36,476 INFO L481 AbstractCegarLoop]: Abstraction has has 157 places, 142 transitions, 1593 flow [2020-10-09 14:47:36,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 14:47:36,477 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:36,478 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:37,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:37,093 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:37,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:37,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1286568708, now seen corresponding path program 2 times [2020-10-09 14:47:37,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:37,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739883530] [2020-10-09 14:47:37,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:37,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:47:37,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:37,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:47:37,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:37,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:37,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:37,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739883530] [2020-10-09 14:47:37,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1122117587] [2020-10-09 14:47:37,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:37,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:47:37,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:37,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:47:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:37,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:37,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:37,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:37,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:37,668 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:37,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002576449] [2020-10-09 14:47:37,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-09 14:47:37,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:47:37,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:37,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:47:37,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:37,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:37,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:37,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:47:37,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2020-10-09 14:47:37,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154650403] [2020-10-09 14:47:37,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 14:47:37,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:37,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 14:47:37,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-10-09 14:47:37,904 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:37,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 142 transitions, 1593 flow. Second operand 24 states. [2020-10-09 14:47:37,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:37,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:37,906 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:39,534 INFO L129 PetriNetUnfolder]: 147/817 cut-off events. [2020-10-09 14:47:39,535 INFO L130 PetriNetUnfolder]: For 16115/16241 co-relation queries the response was YES. [2020-10-09 14:47:39,544 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3561 conditions, 817 events. 147/817 cut-off events. For 16115/16241 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4498 event pairs, 0 based on Foata normal form. 49/785 useless extension candidates. Maximal degree in co-relation 3486. Up to 101 conditions per place. [2020-10-09 14:47:39,553 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 60 selfloop transitions, 122 changer transitions 29/245 dead transitions. [2020-10-09 14:47:39,553 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 245 transitions, 4781 flow [2020-10-09 14:47:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-09 14:47:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-09 14:47:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2153 transitions. [2020-10-09 14:47:39,560 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8328820116054159 [2020-10-09 14:47:39,561 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2153 transitions. [2020-10-09 14:47:39,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2153 transitions. [2020-10-09 14:47:39,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:39,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2153 transitions. [2020-10-09 14:47:39,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-09 14:47:39,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-09 14:47:39,574 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-09 14:47:39,574 INFO L185 Difference]: Start difference. First operand has 157 places, 142 transitions, 1593 flow. Second operand 47 states and 2153 transitions. [2020-10-09 14:47:39,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 245 transitions, 4781 flow [2020-10-09 14:47:39,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 245 transitions, 3805 flow, removed 438 selfloop flow, removed 21 redundant places. [2020-10-09 14:47:39,626 INFO L241 Difference]: Finished difference. Result has 197 places, 186 transitions, 2238 flow [2020-10-09 14:47:39,627 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2238, PETRI_PLACES=197, PETRI_TRANSITIONS=186} [2020-10-09 14:47:39,628 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 142 predicate places. [2020-10-09 14:47:39,628 INFO L481 AbstractCegarLoop]: Abstraction has has 197 places, 186 transitions, 2238 flow [2020-10-09 14:47:39,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 14:47:39,628 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:39,628 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:40,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:40,243 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash -226858967, now seen corresponding path program 3 times [2020-10-09 14:47:40,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:40,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231048795] [2020-10-09 14:47:40,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:40,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 14:47:40,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:47:40,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:40,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:40,595 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:40,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:40,618 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,646 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,674 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,710 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,738 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,764 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,804 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,832 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,857 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,884 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,924 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,949 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:40,970 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:41,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231048795] [2020-10-09 14:47:41,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [567560196] [2020-10-09 14:47:41,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:41,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 14:47:41,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:41,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:47:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:41,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:41,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:41,268 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,272 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,274 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,278 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,289 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,293 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,296 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,299 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,305 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,313 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,316 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,320 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,323 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:41,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899129046] [2020-10-09 14:47:41,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:47:41,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 14:47:41,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:41,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:47:41,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:41,458 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:41,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:41,483 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,491 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,495 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,501 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,505 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,509 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,513 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,515 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,518 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,523 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,526 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,530 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,535 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:41,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:47:41,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 35 [2020-10-09 14:47:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52577420] [2020-10-09 14:47:41,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-09 14:47:41,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:41,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-09 14:47:41,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=932, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 14:47:41,942 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:41,944 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 186 transitions, 2238 flow. Second operand 35 states. [2020-10-09 14:47:41,944 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:41,944 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:41,944 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:43,591 INFO L129 PetriNetUnfolder]: 191/1251 cut-off events. [2020-10-09 14:47:43,592 INFO L130 PetriNetUnfolder]: For 38247/38328 co-relation queries the response was YES. [2020-10-09 14:47:43,611 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5603 conditions, 1251 events. 191/1251 cut-off events. For 38247/38328 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7954 event pairs, 0 based on Foata normal form. 36/1153 useless extension candidates. Maximal degree in co-relation 5515. Up to 148 conditions per place. [2020-10-09 14:47:43,625 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 142 selfloop transitions, 103 changer transitions 20/299 dead transitions. [2020-10-09 14:47:43,625 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 299 transitions, 6294 flow [2020-10-09 14:47:43,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-09 14:47:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-09 14:47:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2089 transitions. [2020-10-09 14:47:43,630 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8256916996047431 [2020-10-09 14:47:43,631 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2089 transitions. [2020-10-09 14:47:43,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2089 transitions. [2020-10-09 14:47:43,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:43,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2089 transitions. [2020-10-09 14:47:43,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 47 states. [2020-10-09 14:47:43,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 47 states. [2020-10-09 14:47:43,640 INFO L81 ComplementDD]: Finished complementDD. Result 47 states. [2020-10-09 14:47:43,641 INFO L185 Difference]: Start difference. First operand has 197 places, 186 transitions, 2238 flow. Second operand 46 states and 2089 transitions. [2020-10-09 14:47:43,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 299 transitions, 6294 flow [2020-10-09 14:47:43,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 299 transitions, 4581 flow, removed 823 selfloop flow, removed 22 redundant places. [2020-10-09 14:47:43,736 INFO L241 Difference]: Finished difference. Result has 223 places, 236 transitions, 2456 flow [2020-10-09 14:47:43,737 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2456, PETRI_PLACES=223, PETRI_TRANSITIONS=236} [2020-10-09 14:47:43,737 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 168 predicate places. [2020-10-09 14:47:43,737 INFO L481 AbstractCegarLoop]: Abstraction has has 223 places, 236 transitions, 2456 flow [2020-10-09 14:47:43,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-09 14:47:43,738 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:43,738 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:44,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3,14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:47:44,353 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:44,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1060204081, now seen corresponding path program 4 times [2020-10-09 14:47:44,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:44,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1987327121] [2020-10-09 14:47:44,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:44,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:47:44,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:47:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:44,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:44,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:44,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:44,694 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,716 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,738 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,764 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,790 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,822 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,845 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,872 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,916 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:44,959 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1987327121] [2020-10-09 14:47:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1864405452] [2020-10-09 14:47:45,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:45,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:47:45,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:45,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:47:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:45,200 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:45,219 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:45,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:45,262 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,267 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,270 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,273 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,276 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,279 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,283 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,287 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,294 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,298 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,301 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:45,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458364217] [2020-10-09 14:47:45,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:47:45,408 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:47:45,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:45,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 14:47:45,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:45,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:45,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:45,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:45,452 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,456 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,458 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,462 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,466 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,469 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,472 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,475 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,478 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,481 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,484 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:45,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:47:45,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 35 [2020-10-09 14:47:45,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412184657] [2020-10-09 14:47:45,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-09 14:47:45,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:45,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-09 14:47:45,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 14:47:45,986 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:45,987 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 236 transitions, 2456 flow. Second operand 35 states. [2020-10-09 14:47:45,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:45,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:45,987 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:48,315 INFO L129 PetriNetUnfolder]: 242/1616 cut-off events. [2020-10-09 14:47:48,315 INFO L130 PetriNetUnfolder]: For 55787/56054 co-relation queries the response was YES. [2020-10-09 14:47:48,340 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7125 conditions, 1616 events. 242/1616 cut-off events. For 55787/56054 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 11269 event pairs, 0 based on Foata normal form. 47/1494 useless extension candidates. Maximal degree in co-relation 7036. Up to 196 conditions per place. [2020-10-09 14:47:48,358 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 96 selfloop transitions, 196 changer transitions 26/352 dead transitions. [2020-10-09 14:47:48,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 352 transitions, 6943 flow [2020-10-09 14:47:48,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-09 14:47:48,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-09 14:47:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2459 transitions. [2020-10-09 14:47:48,364 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.827946127946128 [2020-10-09 14:47:48,364 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2459 transitions. [2020-10-09 14:47:48,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2459 transitions. [2020-10-09 14:47:48,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:48,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2459 transitions. [2020-10-09 14:47:48,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 55 states. [2020-10-09 14:47:48,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 55 states. [2020-10-09 14:47:48,379 INFO L81 ComplementDD]: Finished complementDD. Result 55 states. [2020-10-09 14:47:48,379 INFO L185 Difference]: Start difference. First operand has 223 places, 236 transitions, 2456 flow. Second operand 54 states and 2459 transitions. [2020-10-09 14:47:48,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 352 transitions, 6943 flow [2020-10-09 14:47:48,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 352 transitions, 6204 flow, removed 325 selfloop flow, removed 19 redundant places. [2020-10-09 14:47:48,506 INFO L241 Difference]: Finished difference. Result has 269 places, 284 transitions, 3451 flow [2020-10-09 14:47:48,507 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=3451, PETRI_PLACES=269, PETRI_TRANSITIONS=284} [2020-10-09 14:47:48,508 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 214 predicate places. [2020-10-09 14:47:48,508 INFO L481 AbstractCegarLoop]: Abstraction has has 269 places, 284 transitions, 3451 flow [2020-10-09 14:47:48,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-09 14:47:48,508 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:48,508 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:49,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:49,124 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash -205499389, now seen corresponding path program 5 times [2020-10-09 14:47:49,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:49,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619294713] [2020-10-09 14:47:49,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:49,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 14:47:49,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:49,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:47:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:49,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:49,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:49,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:49,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:49,441 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:49,463 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:49,487 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:49,528 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:49,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619294713] [2020-10-09 14:47:49,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1161694982] [2020-10-09 14:47:49,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:49,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 14:47:49,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:49,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:47:49,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:49,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:49,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:49,989 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:49,992 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:49,994 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:49,997 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:50,000 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:50,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29599496] [2020-10-09 14:47:50,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:47:50,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 14:47:50,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:47:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:50,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:50,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:50,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:50,152 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:50,157 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:50,166 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:50,169 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:50,172 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:50,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:47:50,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 35 [2020-10-09 14:47:50,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568751864] [2020-10-09 14:47:50,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-09 14:47:50,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-09 14:47:50,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 14:47:50,933 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:50,935 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 284 transitions, 3451 flow. Second operand 35 states. [2020-10-09 14:47:50,935 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:50,936 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:50,936 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:53,267 INFO L129 PetriNetUnfolder]: 280/1895 cut-off events. [2020-10-09 14:47:53,267 INFO L130 PetriNetUnfolder]: For 95626/96022 co-relation queries the response was YES. [2020-10-09 14:47:53,287 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9460 conditions, 1895 events. 280/1895 cut-off events. For 95626/96022 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 14108 event pairs, 0 based on Foata normal form. 50/1747 useless extension candidates. Maximal degree in co-relation 9358. Up to 227 conditions per place. [2020-10-09 14:47:53,308 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 75 selfloop transitions, 250 changer transitions 29/388 dead transitions. [2020-10-09 14:47:53,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 388 transitions, 8820 flow [2020-10-09 14:47:53,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-09 14:47:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-09 14:47:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2512 transitions. [2020-10-09 14:47:53,315 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8304132231404958 [2020-10-09 14:47:53,315 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2512 transitions. [2020-10-09 14:47:53,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2512 transitions. [2020-10-09 14:47:53,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:53,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2512 transitions. [2020-10-09 14:47:53,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 56 states. [2020-10-09 14:47:53,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 56 states. [2020-10-09 14:47:53,327 INFO L81 ComplementDD]: Finished complementDD. Result 56 states. [2020-10-09 14:47:53,328 INFO L185 Difference]: Start difference. First operand has 269 places, 284 transitions, 3451 flow. Second operand 55 states and 2512 transitions. [2020-10-09 14:47:53,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 388 transitions, 8820 flow [2020-10-09 14:47:53,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 388 transitions, 7704 flow, removed 472 selfloop flow, removed 27 redundant places. [2020-10-09 14:47:53,483 INFO L241 Difference]: Finished difference. Result has 310 places, 321 transitions, 4318 flow [2020-10-09 14:47:53,484 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2829, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=4318, PETRI_PLACES=310, PETRI_TRANSITIONS=321} [2020-10-09 14:47:53,484 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 255 predicate places. [2020-10-09 14:47:53,484 INFO L481 AbstractCegarLoop]: Abstraction has has 310 places, 321 transitions, 4318 flow [2020-10-09 14:47:53,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-09 14:47:53,484 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:53,484 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:54,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:54,086 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:54,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:54,087 INFO L82 PathProgramCache]: Analyzing trace with hash 554949024, now seen corresponding path program 6 times [2020-10-09 14:47:54,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:54,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1447378015] [2020-10-09 14:47:54,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:54,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 14:47:54,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:54,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 14:47:54,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:54,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:54,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:54,427 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:54,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1447378015] [2020-10-09 14:47:54,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1236480764] [2020-10-09 14:47:54,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:54,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 14:47:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 14:47:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:54,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:54,967 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:54,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:54,969 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:47:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:54,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544618869] [2020-10-09 14:47:54,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:47:55,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-09 14:47:55,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:47:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 14:47:55,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:55,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:55,094 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:55,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:55,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:47:55,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 21, 21] total 39 [2020-10-09 14:47:55,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993966540] [2020-10-09 14:47:55,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-09 14:47:55,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:47:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-09 14:47:55,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1160, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 14:47:56,403 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:47:56,405 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 321 transitions, 4318 flow. Second operand 39 states. [2020-10-09 14:47:56,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:47:56,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:47:56,406 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:47:58,528 INFO L129 PetriNetUnfolder]: 299/1979 cut-off events. [2020-10-09 14:47:58,528 INFO L130 PetriNetUnfolder]: For 147023/147540 co-relation queries the response was YES. [2020-10-09 14:47:58,545 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11499 conditions, 1979 events. 299/1979 cut-off events. For 147023/147540 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 14646 event pairs, 0 based on Foata normal form. 55/1827 useless extension candidates. Maximal degree in co-relation 11382. Up to 242 conditions per place. [2020-10-09 14:47:58,568 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 72 selfloop transitions, 271 changer transitions 20/397 dead transitions. [2020-10-09 14:47:58,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 397 transitions, 9898 flow [2020-10-09 14:47:58,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-09 14:47:58,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 14:47:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2287 transitions. [2020-10-09 14:47:58,575 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8316363636363636 [2020-10-09 14:47:58,575 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2287 transitions. [2020-10-09 14:47:58,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2287 transitions. [2020-10-09 14:47:58,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:47:58,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2287 transitions. [2020-10-09 14:47:58,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 51 states. [2020-10-09 14:47:58,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 51 states. [2020-10-09 14:47:58,586 INFO L81 ComplementDD]: Finished complementDD. Result 51 states. [2020-10-09 14:47:58,586 INFO L185 Difference]: Start difference. First operand has 310 places, 321 transitions, 4318 flow. Second operand 50 states and 2287 transitions. [2020-10-09 14:47:58,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 397 transitions, 9898 flow [2020-10-09 14:47:58,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 397 transitions, 8435 flow, removed 605 selfloop flow, removed 31 redundant places. [2020-10-09 14:47:58,839 INFO L241 Difference]: Finished difference. Result has 335 places, 339 transitions, 4942 flow [2020-10-09 14:47:58,841 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4942, PETRI_PLACES=335, PETRI_TRANSITIONS=339} [2020-10-09 14:47:58,841 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 280 predicate places. [2020-10-09 14:47:58,841 INFO L481 AbstractCegarLoop]: Abstraction has has 335 places, 339 transitions, 4942 flow [2020-10-09 14:47:58,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-09 14:47:58,842 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:47:58,842 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:47:59,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:47:59,456 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:47:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:47:59,457 INFO L82 PathProgramCache]: Analyzing trace with hash 139698311, now seen corresponding path program 7 times [2020-10-09 14:47:59,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:47:59,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [679133578] [2020-10-09 14:47:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2020-10-09 14:47:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:47:59,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 14:47:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:47:59,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:47:59,729 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:47:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:47:59,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:47:59,799 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:00,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [679133578] [2020-10-09 14:48:00,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1340847698] [2020-10-09 14:48:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 14:48:00,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:00,318 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:00,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:00,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:00,332 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:00,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926753304] [2020-10-09 14:48:00,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:48:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-09 14:48:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:00,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:00,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:00,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:00,455 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:00,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:00,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22, 22, 22, 22] total 41 [2020-10-09 14:48:00,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345415764] [2020-10-09 14:48:00,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-09 14:48:00,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:00,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-09 14:48:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1278, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 14:48:01,783 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:01,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 339 transitions, 4942 flow. Second operand 41 states. [2020-10-09 14:48:01,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:01,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:01,785 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:04,253 INFO L129 PetriNetUnfolder]: 323/2156 cut-off events. [2020-10-09 14:48:04,253 INFO L130 PetriNetUnfolder]: For 193225/193838 co-relation queries the response was YES. [2020-10-09 14:48:04,281 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13612 conditions, 2156 events. 323/2156 cut-off events. For 193225/193838 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 16094 event pairs, 0 based on Foata normal form. 73/2005 useless extension candidates. Maximal degree in co-relation 13487. Up to 263 conditions per place. [2020-10-09 14:48:04,304 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 80 selfloop transitions, 296 changer transitions 30/440 dead transitions. [2020-10-09 14:48:04,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 440 transitions, 12098 flow [2020-10-09 14:48:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-09 14:48:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-09 14:48:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 2604 transitions. [2020-10-09 14:48:04,311 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.830622009569378 [2020-10-09 14:48:04,311 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 2604 transitions. [2020-10-09 14:48:04,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 2604 transitions. [2020-10-09 14:48:04,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:04,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 2604 transitions. [2020-10-09 14:48:04,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 58 states. [2020-10-09 14:48:04,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 58 states. [2020-10-09 14:48:04,322 INFO L81 ComplementDD]: Finished complementDD. Result 58 states. [2020-10-09 14:48:04,323 INFO L185 Difference]: Start difference. First operand has 335 places, 339 transitions, 4942 flow. Second operand 57 states and 2604 transitions. [2020-10-09 14:48:04,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 440 transitions, 12098 flow [2020-10-09 14:48:04,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 440 transitions, 9428 flow, removed 1112 selfloop flow, removed 42 redundant places. [2020-10-09 14:48:04,845 INFO L241 Difference]: Finished difference. Result has 361 places, 365 transitions, 5428 flow [2020-10-09 14:48:04,846 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=5428, PETRI_PLACES=361, PETRI_TRANSITIONS=365} [2020-10-09 14:48:04,847 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 306 predicate places. [2020-10-09 14:48:04,847 INFO L481 AbstractCegarLoop]: Abstraction has has 361 places, 365 transitions, 5428 flow [2020-10-09 14:48:04,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-09 14:48:04,847 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:04,847 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:48:05,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 mathsat -unsat_core_generation=3 [2020-10-09 14:48:05,449 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:05,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1428477843, now seen corresponding path program 8 times [2020-10-09 14:48:05,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:05,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669665591] [2020-10-09 14:48:05,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:05,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:48:05,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:05,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 14:48:05,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:05,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:05,788 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:05,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:06,038 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669665591] [2020-10-09 14:48:06,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1520509605] [2020-10-09 14:48:06,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 29 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:06,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:48:06,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 25 conjunts are in the unsatisfiable core [2020-10-09 14:48:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:06,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:06,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:06,246 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669880329] [2020-10-09 14:48:06,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:48:06,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:48:06,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:06,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-09 14:48:06,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:06,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:06,536 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:06,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24, 24, 24, 24] total 27 [2020-10-09 14:48:06,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780214942] [2020-10-09 14:48:06,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-09 14:48:06,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:06,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-09 14:48:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-10-09 14:48:07,310 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:07,311 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 365 transitions, 5428 flow. Second operand 27 states. [2020-10-09 14:48:07,311 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:07,312 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:07,312 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:09,402 INFO L129 PetriNetUnfolder]: 309/2120 cut-off events. [2020-10-09 14:48:09,402 INFO L130 PetriNetUnfolder]: For 157519/157735 co-relation queries the response was YES. [2020-10-09 14:48:09,422 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12013 conditions, 2120 events. 309/2120 cut-off events. For 157519/157735 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 15693 event pairs, 0 based on Foata normal form. 62/1960 useless extension candidates. Maximal degree in co-relation 11879. Up to 255 conditions per place. [2020-10-09 14:48:09,435 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 79 selfloop transitions, 290 changer transitions 5/408 dead transitions. [2020-10-09 14:48:09,435 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 408 transitions, 9070 flow [2020-10-09 14:48:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-09 14:48:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-09 14:48:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2050 transitions. [2020-10-09 14:48:09,446 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8282828282828283 [2020-10-09 14:48:09,446 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2050 transitions. [2020-10-09 14:48:09,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2050 transitions. [2020-10-09 14:48:09,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:09,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2050 transitions. [2020-10-09 14:48:09,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 46 states. [2020-10-09 14:48:09,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 46 states. [2020-10-09 14:48:09,452 INFO L81 ComplementDD]: Finished complementDD. Result 46 states. [2020-10-09 14:48:09,452 INFO L185 Difference]: Start difference. First operand has 361 places, 365 transitions, 5428 flow. Second operand 45 states and 2050 transitions. [2020-10-09 14:48:09,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 408 transitions, 9070 flow [2020-10-09 14:48:09,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 408 transitions, 7793 flow, removed 420 selfloop flow, removed 43 redundant places. [2020-10-09 14:48:09,728 INFO L241 Difference]: Finished difference. Result has 358 places, 369 transitions, 5118 flow [2020-10-09 14:48:09,730 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4351, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5118, PETRI_PLACES=358, PETRI_TRANSITIONS=369} [2020-10-09 14:48:09,731 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 303 predicate places. [2020-10-09 14:48:09,731 INFO L481 AbstractCegarLoop]: Abstraction has has 358 places, 369 transitions, 5118 flow [2020-10-09 14:48:09,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-09 14:48:09,731 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:09,731 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:48:10,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 mathsat -unsat_core_generation=3,29 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:10,333 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:10,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:10,334 INFO L82 PathProgramCache]: Analyzing trace with hash -838103338, now seen corresponding path program 9 times [2020-10-09 14:48:10,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:10,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954074523] [2020-10-09 14:48:10,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 31 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:10,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-09 14:48:10,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-09 14:48:10,406 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 14:48:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 14:48:10,436 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 14:48:10,624 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 14:48:10,625 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 14:48:10,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 mathsat -unsat_core_generation=3 [2020-10-09 14:48:11,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:48:11 BasicIcfg [2020-10-09 14:48:11,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:48:11,064 INFO L168 Benchmark]: Toolchain (without parser) took 42965.10 ms. Allocated memory was 244.8 MB in the beginning and 890.8 MB in the end (delta: 645.9 MB). Free memory was 197.7 MB in the beginning and 371.7 MB in the end (delta: -174.0 MB). Peak memory consumption was 472.0 MB. Max. memory is 14.2 GB. [2020-10-09 14:48:11,065 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 244.8 MB. Free memory is still 218.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:48:11,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 818.62 ms. Allocated memory was 244.8 MB in the beginning and 298.3 MB in the end (delta: 53.5 MB). Free memory was 197.7 MB in the beginning and 253.7 MB in the end (delta: -56.1 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. [2020-10-09 14:48:11,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.19 ms. Allocated memory is still 298.3 MB. Free memory is still 253.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:48:11,066 INFO L168 Benchmark]: Boogie Preprocessor took 33.37 ms. Allocated memory is still 298.3 MB. Free memory was 253.7 MB in the beginning and 251.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:48:11,067 INFO L168 Benchmark]: RCFGBuilder took 556.62 ms. Allocated memory is still 298.3 MB. Free memory was 251.2 MB in the beginning and 231.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 14.2 GB. [2020-10-09 14:48:11,068 INFO L168 Benchmark]: TraceAbstraction took 41486.21 ms. Allocated memory was 298.3 MB in the beginning and 890.8 MB in the end (delta: 592.4 MB). Free memory was 229.1 MB in the beginning and 371.7 MB in the end (delta: -142.5 MB). Peak memory consumption was 449.9 MB. Max. memory is 14.2 GB. [2020-10-09 14:48:11,071 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 244.8 MB. Free memory is still 218.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 818.62 ms. Allocated memory was 244.8 MB in the beginning and 298.3 MB in the end (delta: 53.5 MB). Free memory was 197.7 MB in the beginning and 253.7 MB in the end (delta: -56.1 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 64.19 ms. Allocated memory is still 298.3 MB. Free memory is still 253.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 33.37 ms. Allocated memory is still 298.3 MB. Free memory was 253.7 MB in the beginning and 251.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 556.62 ms. Allocated memory is still 298.3 MB. Free memory was 251.2 MB in the beginning and 231.6 MB in the end (delta: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 14.2 GB. * TraceAbstraction took 41486.21 ms. Allocated memory was 298.3 MB in the beginning and 890.8 MB in the end (delta: 592.4 MB). Free memory was 229.1 MB in the beginning and 371.7 MB in the end (delta: -142.5 MB). Peak memory consumption was 449.9 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; VAL [i=3, j=6] [L693] 0 pthread_t id1, id2; VAL [i=3, j=6] [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=1] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=2] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=2] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=1] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=3] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=3, k=4] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=4, k=5] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=6] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=6] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=7] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=9] [L677] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=7] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=8, k=9] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L685] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L700] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L702] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 41.1s, OverallIterations: 12, TraceHistogramMax: 10, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 959 SDslu, 608 SDs, 0 SdLazy, 2857 SolverSat, 1438 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4775 GetRequests, 4075 SyntacticMatches, 59 SemanticMatches, 641 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13472 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5428occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 2347 NumberOfCodeBlocks, 2347 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 4396 ConstructedInterpolants, 0 QuantifiedInterpolants, 1456076 SizeOfPredicates, 418 NumberOfNonLiveVariables, 4544 ConjunctsInSsa, 511 ConjunctsInUnsatCore, 58 InterpolantComputations, 4 PerfectInterpolantSequences, 0/8622 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...